# kb

id: visual-viewport-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Visual_Viewport-1.md
category: reference
title: Visual viewport - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Visual_Viewport
date_saved: 2026-05-05T05:48:34.366900+00:00
instance: kb-cron
parent: visual-viewport-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Nov 19, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Visual_Viewport/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/visual_viewport/index.md?plain=1 "Folder: en-us/glossary/visual_viewport \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVisual_Viewport&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fvisual_viewport%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVisual_Viewport%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fvisual_viewport%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F9be502ee0f8b030908e59d30884190281acb8054%0A*+Document+last+modified%3A+2025-11-19T16%3A16%3A06.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: voip-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/VoIP-0.md
category: reference
title: VoIP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/VoIP
date_saved: 2026-05-05T05:48:36.691190+00:00
instance: kb-cron
parent: voip-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/VoIP#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/VoIP#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: voip-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/VoIP-1.md
category: reference
title: VoIP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/VoIP
date_saved: 2026-05-05T05:48:36.691190+00:00
instance: kb-cron
parent: voip-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/VoIP/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/voip/index.md?plain=1 "Folder: en-us/glossary/voip \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVoIP&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fvoip%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVoIP%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fvoip%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: void-element-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Void_element-0.md
category: reference
title: Void element - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Void_element
date_saved: 2026-05-05T05:48:39.015862+00:00
instance: kb-cron
parent: void-element-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Void_element#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Void_element#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: void-element-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Void_element-1.md
category: reference
title: Void element - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Void_element
date_saved: 2026-05-05T05:48:39.015862+00:00
instance: kb-cron
parent: void-element-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Apr 7, 2026 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Void_element/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/void_element/index.md?plain=1 "Folder: en-us/glossary/void_element \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVoid_element&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fvoid_element%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FVoid_element%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fvoid_element%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Fd559e66723de93ce6c59eb5d22a29afca7265c2a%0A*+Document+last+modified%3A+2026-04-07T16%3A49%3A20.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: w3c-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/W3C-0.md
category: reference
title: W3C - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/W3C
date_saved: 2026-05-05T05:48:41.729535+00:00
instance: kb-cron
parent: w3c-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/W3C#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/W3C#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: w3c-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/W3C-1.md
category: reference
title: W3C - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/W3C
date_saved: 2026-05-05T05:48:41.729535+00:00
instance: kb-cron
parent: w3c-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/W3C/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/w3c/index.md?plain=1 "Folder: en-us/glossary/w3c \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FW3C&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fw3c%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FW3C%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fw3c%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: wai-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WAI-0.md
category: reference
title: WAI - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WAI
date_saved: 2026-05-05T05:48:44.282653+00:00
instance: kb-cron
parent: wai-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WAI#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WAI#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: wai-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WAI-1.md
category: reference
title: WAI - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WAI
date_saved: 2026-05-05T05:48:44.282653+00:00
instance: kb-cron
parent: wai-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WAI/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/wai/index.md?plain=1 "Folder: en-us/glossary/wai \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWAI&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwai%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWAI%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwai%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: wcag-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WCAG-0.md
category: reference
title: WCAG - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WCAG
date_saved: 2026-05-05T05:48:46.787158+00:00
instance: kb-cron
parent: wcag-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WCAG#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WCAG#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: wcag-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WCAG-1.md
category: reference
title: WCAG - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WCAG
date_saved: 2026-05-05T05:48:46.787158+00:00
instance: kb-cron
parent: wcag-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WCAG/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/wcag/index.md?plain=1 "Folder: en-us/glossary/wcag \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWCAG&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwcag%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWCAG%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwcag%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: whatwg-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WHATWG-0.md
category: reference
title: WHATWG - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WHATWG
date_saved: 2026-05-05T05:48:49.174675+00:00
instance: kb-cron
parent: whatwg-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WHATWG#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WHATWG#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: whatwg-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WHATWG-1.md
category: reference
title: WHATWG - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WHATWG
date_saved: 2026-05-05T05:48:49.174675+00:00
instance: kb-cron
parent: whatwg-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WHATWG/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/whatwg/index.md?plain=1 "Folder: en-us/glossary/whatwg \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWHATWG&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwhatwg%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWHATWG%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwhatwg%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webassembly-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebAssembly-0.md
category: reference
title: WebAssembly - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly
date_saved: 2026-05-05T05:48:51.466136+00:00
instance: kb-cron
parent: webassembly-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webassembly-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebAssembly-1.md
category: reference
title: WebAssembly - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly
date_saved: 2026-05-05T05:48:51.466136+00:00
instance: kb-cron
parent: webassembly-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebAssembly/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webassembly/index.md?plain=1 "Folder: en-us/glossary/webassembly \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebAssembly&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebassembly%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebAssembly%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebassembly%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webdav-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebDAV-0.md
category: reference
title: WebDAV - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebDAV
date_saved: 2026-05-05T05:48:54.120783+00:00
instance: kb-cron
parent: webdav-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebDAV#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebDAV#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webdav-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebDAV-1.md
category: reference
title: WebDAV - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebDAV
date_saved: 2026-05-05T05:48:54.120783+00:00
instance: kb-cron
parent: webdav-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebDAV/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webdav/index.md?plain=1 "Folder: en-us/glossary/webdav \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebDAV&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebdav%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebDAV%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebdav%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webextensions-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebExtensions-0.md
category: reference
title: WebExtensions - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions
date_saved: 2026-05-05T05:48:56.573416+00:00
instance: kb-cron
parent: webextensions-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webextensions-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebExtensions-1.md
category: reference
title: WebExtensions - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions
date_saved: 2026-05-05T05:48:56.573416+00:00
instance: kb-cron
parent: webextensions-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebExtensions/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webextensions/index.md?plain=1 "Folder: en-us/glossary/webextensions \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebExtensions&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebextensions%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebExtensions%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebextensions%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webgl-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebGL-0.md
category: reference
title: WebGL - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebGL
date_saved: 2026-05-05T05:48:59.260653+00:00
instance: kb-cron
parent: webgl-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebGL#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebGL#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webgl-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebGL-1.md
category: reference
title: WebGL - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebGL
date_saved: 2026-05-05T05:48:59.260653+00:00
instance: kb-cron
parent: webgl-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebGL/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webgl/index.md?plain=1 "Folder: en-us/glossary/webgl \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebGL&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebgl%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebGL%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebgl%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webidl-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebIDL-0.md
category: reference
title: WebIDL - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebIDL
date_saved: 2026-05-05T05:49:01.796307+00:00
instance: kb-cron
parent: webidl-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebIDL#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebIDL#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webidl-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebIDL-1.md
category: reference
title: WebIDL - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebIDL
date_saved: 2026-05-05T05:49:01.796307+00:00
instance: kb-cron
parent: webidl-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebIDL/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webidl/index.md?plain=1 "Folder: en-us/glossary/webidl \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebIDL&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebidl%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebIDL%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebidl%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webkit-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebKit-0.md
category: reference
title: WebKit - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebKit
date_saved: 2026-05-05T05:49:04.170954+00:00
instance: kb-cron
parent: webkit-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebKit#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebKit#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webkit-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebKit-1.md
category: reference
title: WebKit - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebKit
date_saved: 2026-05-05T05:49:04.170954+00:00
instance: kb-cron
parent: webkit-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Oct 28, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebKit/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webkit/index.md?plain=1 "Folder: en-us/glossary/webkit \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebKit&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebkit%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebKit%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebkit%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F1f6d5b39a5883789ece6b570227648113c7021a1%0A*+Document+last+modified%3A+2025-10-28T16%3A22%3A04.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webm-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebM-0.md
category: reference
title: WebM - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebM
date_saved: 2026-05-05T05:49:06.533492+00:00
instance: kb-cron
parent: webm-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebM#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebM#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webm-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebM-1.md
category: reference
title: WebM - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebM
date_saved: 2026-05-05T05:49:06.533492+00:00
instance: kb-cron
parent: webm-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebM/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webm/index.md?plain=1 "Folder: en-us/glossary/webm \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebM&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebm%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebM%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebm%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webp-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebP-0.md
category: reference
title: WebP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebP
date_saved: 2026-05-05T05:49:08.945549+00:00
instance: kb-cron
parent: webp-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebP#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebP#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webp-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebP-1.md
category: reference
title: WebP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebP
date_saved: 2026-05-05T05:49:08.945549+00:00
instance: kb-cron
parent: webp-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Aug 4, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebP/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webp/index.md?plain=1 "Folder: en-us/glossary/webp \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebP&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebp%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebP%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebp%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F1ac2997717ee7e899121ab045cf5b391e1e15518%0A*+Document+last+modified%3A+2025-08-04T18%3A47%3A53.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webrtc-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebRTC-0.md
category: reference
title: WebRTC - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebRTC
date_saved: 2026-05-05T05:49:11.433243+00:00
instance: kb-cron
parent: webrtc-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebRTC#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebRTC#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webrtc-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebRTC-1.md
category: reference
title: WebRTC - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebRTC
date_saved: 2026-05-05T05:49:11.433243+00:00
instance: kb-cron
parent: webrtc-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebRTC/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webrtc/index.md?plain=1 "Folder: en-us/glossary/webrtc \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebRTC&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebrtc%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebRTC%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebrtc%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: websockets-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebSockets-0.md
category: reference
title: WebSockets - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebSockets
date_saved: 2026-05-05T05:49:13.951753+00:00
instance: kb-cron
parent: websockets-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebSockets#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebSockets#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: websockets-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebSockets-1.md
category: reference
title: WebSockets - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebSockets
date_saved: 2026-05-05T05:49:13.951753+00:00
instance: kb-cron
parent: websockets-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebSockets/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/websockets/index.md?plain=1 "Folder: en-us/glossary/websockets \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebSockets&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebsockets%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebSockets%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebsockets%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: webvtt-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WebVTT-0.md
category: reference
title: WebVTT - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebVTT
date_saved: 2026-05-05T05:49:16.480385+00:00
instance: kb-cron
parent: webvtt-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WebVTT#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WebVTT#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: webvtt-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WebVTT-1.md
category: reference
title: WebVTT - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WebVTT
date_saved: 2026-05-05T05:49:16.480385+00:00
instance: kb-cron
parent: webvtt-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WebVTT/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/webvtt/index.md?plain=1 "Folder: en-us/glossary/webvtt \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebVTT&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwebvtt%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWebVTT%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwebvtt%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: web-performance-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_performance-0.md
category: reference
title: Web performance - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_performance
date_saved: 2026-05-05T05:49:18.717759+00:00
instance: kb-cron
parent: web-performance-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Web_performance#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Web_performance#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: web-performance-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_performance-1.md
category: reference
title: Web performance - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_performance
date_saved: 2026-05-05T05:49:18.717759+00:00
instance: kb-cron
parent: web-performance-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Web_performance/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/web_performance/index.md?plain=1 "Folder: en-us/glossary/web_performance \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_performance&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fweb_performance%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_performance%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fweb_performance%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: web-server-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_server-0.md
category: reference
title: Web server - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_server
date_saved: 2026-05-05T05:49:21.374673+00:00
instance: kb-cron
parent: web-server-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Web_server#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Web_server#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: web-server-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_server-1.md
category: reference
title: Web server - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_server
date_saved: 2026-05-05T05:49:21.374673+00:00
instance: kb-cron
parent: web-server-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Web_server/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/web_server/index.md?plain=1 "Folder: en-us/glossary/web_server \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_server&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fweb_server%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_server%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fweb_server%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: web-standards-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_standards-0.md
category: reference
title: Web standards - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_standards
date_saved: 2026-05-05T05:49:23.652432+00:00
instance: kb-cron
parent: web-standards-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Web_standards#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Web_standards#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: web-standards-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Web_standards-1.md
category: reference
title: Web standards - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Web_standards
date_saved: 2026-05-05T05:49:23.652432+00:00
instance: kb-cron
parent: web-standards-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Web_standards/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/web_standards/index.md?plain=1 "Folder: en-us/glossary/web_standards \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_standards&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fweb_standards%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWeb_standards%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fweb_standards%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: whitespace-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Whitespace-0.md
category: reference
title: Whitespace - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Whitespace
date_saved: 2026-05-05T05:49:26.049959+00:00
instance: kb-cron
parent: whitespace-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Whitespace#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Whitespace#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: whitespace-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Whitespace-1.md
category: reference
title: Whitespace - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Whitespace
date_saved: 2026-05-05T05:49:26.049959+00:00
instance: kb-cron
parent: whitespace-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Nov 7, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Whitespace/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/whitespace/index.md?plain=1 "Folder: en-us/glossary/whitespace \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWhitespace&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwhitespace%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWhitespace%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwhitespace%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F85fccefc8066bd49af4ddafc12c77f35265c7e2d%0A*+Document+last+modified%3A+2025-11-07T15%3A58%3A06.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: windowproxy-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/WindowProxy-0.md
category: reference
title: WindowProxy - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy
date_saved: 2026-05-05T05:49:28.328809+00:00
instance: kb-cron
parent: windowproxy-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: windowproxy-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/WindowProxy-1.md
category: reference
title: WindowProxy - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy
date_saved: 2026-05-05T05:49:28.328809+00:00
instance: kb-cron
parent: windowproxy-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/WindowProxy/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/windowproxy/index.md?plain=1 "Folder: en-us/glossary/windowproxy \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWindowProxy&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwindowproxy%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWindowProxy%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwindowproxy%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: world-wide-web-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web-0.md
category: reference
title: World Wide Web - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web
date_saved: 2026-05-05T05:49:30.909977+00:00
instance: kb-cron
parent: world-wide-web-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: world-wide-web-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web-1.md
category: reference
title: World Wide Web - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web
date_saved: 2026-05-05T05:49:30.909977+00:00
instance: kb-cron
parent: world-wide-web-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/World_Wide_Web/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/world_wide_web/index.md?plain=1 "Folder: en-us/glossary/world_wide_web \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWorld_Wide_Web&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fworld_wide_web%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWorld_Wide_Web%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fworld_wide_web%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: wrapper-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Wrapper-0.md
category: reference
title: Wrapper - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Wrapper
date_saved: 2026-05-05T05:49:33.475537+00:00
instance: kb-cron
parent: wrapper-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Wrapper#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Wrapper#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: wrapper-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Wrapper-1.md
category: reference
title: Wrapper - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Wrapper
date_saved: 2026-05-05T05:49:33.475537+00:00
instance: kb-cron
parent: wrapper-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Wrapper/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/wrapper/index.md?plain=1 "Folder: en-us/glossary/wrapper \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWrapper&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fwrapper%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FWrapper%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fwrapper%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xforms-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XForms-0.md
category: reference
title: XForms - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XForms
date_saved: 2026-05-05T05:49:35.982735+00:00
instance: kb-cron
parent: xforms-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XForms#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XForms#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xforms-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XForms-1.md
category: reference
title: XForms - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XForms
date_saved: 2026-05-05T05:49:35.982735+00:00
instance: kb-cron
parent: xforms-glossary-mdn-20260505-0
summary:
# XForms **XForms** is a convention for building Web forms and processing form data in the [XML](https://developer.mozilla.org/en-US/docs/Glossary/XML) format. **Note:** No major browser supports XForms any longer—we suggest using [Web forms](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms) instead. ## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XForms/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xforms/index.md?plain=1 "Folder: en-us/glossary/xforms \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXForms&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxforms%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXForms%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxforms%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2.


id: xhtml-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XHTML-0.md
category: reference
title: XHTML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XHTML
date_saved: 2026-05-05T05:49:38.457620+00:00
instance: kb-cron
parent: xhtml-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XHTML#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XHTML#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xhtml-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XHTML-1.md
category: reference
title: XHTML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XHTML
date_saved: 2026-05-05T05:49:38.457620+00:00
instance: kb-cron
parent: xhtml-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Nov 13, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XHTML/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xhtml/index.md?plain=1 "Folder: en-us/glossary/xhtml \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXHTML&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxhtml%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXHTML%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxhtml%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F0c81cbce5f95a0be935724bcd936f5592774eb3a%0A*+Document+last+modified%3A+2025-11-13T20%3A10%3A50.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xinclude-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XInclude-0.md
category: reference
title: XInclude - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XInclude
date_saved: 2026-05-05T05:49:41.125393+00:00
instance: kb-cron
parent: xinclude-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XInclude#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XInclude#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xinclude-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XInclude-1.md
category: reference
title: XInclude - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XInclude
date_saved: 2026-05-05T05:49:41.125393+00:00
instance: kb-cron
parent: xinclude-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XInclude/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xinclude/index.md?plain=1 "Folder: en-us/glossary/xinclude \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXInclude&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxinclude%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXInclude%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxinclude%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xlink-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XLink-0.md
category: reference
title: XLink - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XLink
date_saved: 2026-05-05T05:49:43.441473+00:00
instance: kb-cron
parent: xlink-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XLink#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XLink#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xlink-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XLink-1.md
category: reference
title: XLink - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XLink
date_saved: 2026-05-05T05:49:43.441473+00:00
instance: kb-cron
parent: xlink-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Nov 13, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XLink/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xlink/index.md?plain=1 "Folder: en-us/glossary/xlink \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXLink&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxlink%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXLink%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxlink%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F0c81cbce5f95a0be935724bcd936f5592774eb3a%0A*+Document+last+modified%3A+2025-11-13T20%3A10%3A50.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xml-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XML-0.md
category: reference
title: XML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XML
date_saved: 2026-05-05T05:49:45.895207+00:00
instance: kb-cron
parent: xml-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XML#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XML#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xml-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XML-1.md
category: reference
title: XML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XML
date_saved: 2026-05-05T05:49:45.895207+00:00
instance: kb-cron
parent: xml-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XML/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xml/index.md?plain=1 "Folder: en-us/glossary/xml \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXML&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxml%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXML%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxml%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xmlhttprequest-xhr-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest-0.md
category: reference
title: XMLHttpRequest (XHR) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest
date_saved: 2026-05-05T05:49:48.357853+00:00
instance: kb-cron
parent: xmlhttprequest-xhr-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xmlhttprequest-xhr-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest-1.md
category: reference
title: XMLHttpRequest (XHR) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest
date_saved: 2026-05-05T05:49:48.357853+00:00
instance: kb-cron
parent: xmlhttprequest-xhr-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XMLHttpRequest/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xmlhttprequest/index.md?plain=1 "Folder: en-us/glossary/xmlhttprequest \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXMLHttpRequest&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxmlhttprequest%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXMLHttpRequest%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxmlhttprequest%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xpath-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XPath-0.md
category: reference
title: XPath - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XPath
date_saved: 2026-05-05T05:49:50.953787+00:00
instance: kb-cron
parent: xpath-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XPath#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XPath#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xpath-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XPath-1.md
category: reference
title: XPath - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XPath
date_saved: 2026-05-05T05:49:50.953787+00:00
instance: kb-cron
parent: xpath-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XPath/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xpath/index.md?plain=1 "Folder: en-us/glossary/xpath \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXPath&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxpath%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXPath%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxpath%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xquery-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XQuery-0.md
category: reference
title: XQuery - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XQuery
date_saved: 2026-05-05T05:49:53.503375+00:00
instance: kb-cron
parent: xquery-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XQuery#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XQuery#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xquery-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XQuery-1.md
category: reference
title: XQuery - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XQuery
date_saved: 2026-05-05T05:49:53.503375+00:00
instance: kb-cron
parent: xquery-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XQuery/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xquery/index.md?plain=1 "Folder: en-us/glossary/xquery \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXQuery&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxquery%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXQuery%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxquery%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: xslt-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/XSLT-0.md
category: reference
title: XSLT - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XSLT
date_saved: 2026-05-05T05:49:56.232928+00:00
instance: kb-cron
parent: xslt-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/XSLT#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/XSLT#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: xslt-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/XSLT-1.md
category: reference
title: XSLT - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/XSLT
date_saved: 2026-05-05T05:49:56.232928+00:00
instance: kb-cron
parent: xslt-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/XSLT/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/xslt/index.md?plain=1 "Folder: en-us/glossary/xslt \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXSLT&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fxslt%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FXSLT%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fxslt%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: zstandard-compression-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression-0.md
category: reference
title: Zstandard compression - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression
date_saved: 2026-05-05T05:49:58.763864+00:00
instance: kb-cron
parent: zstandard-compression-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: zstandard-compression-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression-1.md
category: reference
title: Zstandard compression - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression
date_saved: 2026-05-05T05:49:58.763864+00:00
instance: kb-cron
parent: zstandard-compression-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Zstandard_compression/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/zstandard_compression/index.md?plain=1 "Folder: en-us/glossary/zstandard_compression \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FZstandard_compression&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fzstandard_compression%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FZstandard_compression%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fzstandard_compression%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. [bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache) 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: bfcache-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/bfcache-0.md
category: reference
title: bfcache - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/bfcache
date_saved: 2026-05-05T05:50:01.435395+00:00
instance: kb-cron
parent: bfcache-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/bfcache#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/bfcache#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


id: bfcache-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/bfcache-1.md
category: reference
title: bfcache - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/bfcache
date_saved: 2026-05-05T05:50:01.435395+00:00
instance: kb-cron
parent: bfcache-glossary-mdn-20260505-0
summary:
## Help improve MDN [Learn how to contribute](https://developer.mozilla.org/en-US/docs/MDN/Community/Getting_started) This page was last modified on Jul 11, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/bfcache/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/bfcache/index.md?plain=1 "Folder: en-us/glossary/bfcache \(Opens in a new tab\)") • [Report a problem with this content](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2Fbfcache&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-us%2Fglossary%2Fbfcache%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2Fbfcache%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fbfcache%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F2547f622337d6cbf8c3794776b17ed377d6aad57%0A*+Document+last+modified%3A+2025-07-11T14%3A45%3A59.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.") 1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary) 2. 1. [Abstraction](https://developer.mozilla.org/en-US/docs/Glossary/Abstraction) 2. [Accent](https://developer.mozilla.org/en-US/docs/Glossary/Accent) 3. [Accessibility](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility) 4. [Accessibility tree](https://developer.mozilla.org/en-US/docs/Glossary/Accessibility_tree) 5. [Accessible description](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description) 6. [Accessible name](https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name) 7. [Adobe Flash](https://developer.mozilla.org/en-US/docs/Glossary/Adobe_Flash) 8. [Advance measure](https://developer.mozilla.org/en-US/docs/Glossary/Advance_measure) 9. [Ajax](https://developer.mozilla.org/en-US/docs/Glossary/AJAX) 10. [Algorithm](https://developer.mozilla.org/en-US/docs/Glossary/Algorithm) 11. [Alignment container](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Container) 12. [Alignment subject](https://developer.mozilla.org/en-US/docs/Glossary/Alignment_Subject) 13. [Alpha (alpha channel)](https://developer.mozilla.org/en-US/docs/Glossary/Alpha) 14. [ALPN](https://developer.mozilla.org/en-US/docs/Glossary/ALPN) 15. [API](https://developer.mozilla.org/en-US/docs/Glossary/API) 16. [Apple Safari](https://developer.mozilla.org/en-US/docs/Glossary/Apple_Safari) 17. [Application context](https://developer.mozilla.org/en-US/docs/Glossary/Application_context) 18. [Argument](https://developer.mozilla.org/en-US/docs/Glossary/Argument) 19. [ARIA](https://developer.mozilla.org/en-US/docs/Glossary/ARIA) 20. [ARPA](https://developer.mozilla.org/en-US/docs/Glossary/ARPA) 21. [ARPANET](https://developer.mozilla.org/en-US/docs/Glossary/Arpanet) 22. [Array](https://developer.mozilla.org/en-US/docs/Glossary/Array) 23. [ASCII](https://developer.mozilla.org/en-US/docs/Glossary/ASCII) 24. [Aspect ratio](https://developer.mozilla.org/en-US/docs/Glossary/Aspect_ratio) 25. [Asynchronous](https://developer.mozilla.org/en-US/docs/Glossary/Asynchronous) 26. [ATAG](https://developer.mozilla.org/en-US/docs/Glossary/ATAG) 27. [Attribute](https://developer.mozilla.org/en-US/docs/Glossary/Attribute) 28. [Authentication](https://developer.mozilla.org/en-US/docs/Glossary/Authentication) 29. [Authenticator](https://developer.mozilla.org/en-US/docs/Glossary/Authenticator) 30. [Bandwidth](https://developer.mozilla.org/en-US/docs/Glossary/Bandwidth) 31. [Base64](https://developer.mozilla.org/en-US/docs/Glossary/Base64) 32. [Baseline](https://developer.mozilla.org/en-US/docs/Glossary/Baseline) 1. [Baseline (compatibility)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility) 2. [Baseline (typography)](https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Typography) 33. [BCP 47 language tag](https://developer.mozilla.org/en-US/docs/Glossary/BCP_47_language_tag) 34. [Beacon](https://developer.mozilla.org/en-US/docs/Glossary/Beacon) 35. [Bézier curve](https://developer.mozilla.org/en-US/docs/Glossary/Bezier_curve) 36. _[bfcache](https://developer.mozilla.org/en-US/docs/Glossary/bfcache)_ 37. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi) 38. [BigInt](https://developer.mozilla.org/en-US/docs/Glossary/BigInt) 39. [Binding](https://developer.mozilla.org/en-US/docs/Glossary/Binding) 40. [Bitwise flags](https://developer.mozilla.org/en-US/docs/Glossary/Bitwise_flags) 41. [Blink](https://developer.mozilla.org/en-US/docs/Glossary/Blink) 42. [blink element (<blink> tag)](https://developer.mozilla.org/en-US/docs/Glossary/blink_element) 43. [Block](https://developer.mozilla.org/en-US/docs/Glossary/Block) 1. [Block (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/Block/CSS) 2. [Block (scripting)](https://developer.mozilla.org/en-US/docs/Glossary/Block/Scripting) 44. [Block cipher mode of operation](https://developer.mozilla.org/en-US/docs/Glossary/Block_cipher_mode_of_operation) 45. [Block-level content](https://developer.mozilla.org/en-US/docs/Glossary/Block-level_content) 46. [Boolean](https://developer.mozilla.org/en-US/docs/Glossary/Boolean) 1. [Boolean (JavaScript)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/JavaScript) 2. [Boolean attribute (ARIA)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/ARIA) 3. [Boolean attribute (HTML)](https://developer.mozilla.org/en-US/docs/Glossary/Boolean/HTML) 47. [Bounding box](https://developer.mozilla.org/en-US/docs/Glossary/Bounding_box) 48. [Breadcrumb](https://developer.mozilla.org/en-US/docs/Glossary/Breadcrumb) 49. [Brotli


id: blink-element-blink-tag-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/blink_element-0.md
category: reference
title: blink element (<blink> tag) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/blink_element
date_saved: 2026-05-05T05:50:03.738561+00:00
instance: kb-cron
parent: blink-element-blink-tag-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/blink_element#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/blink_element#search) [ MDN ](https://developer.mozilla.org/en-US/) HTML [HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML) HTML reference * [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements) * [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes) * [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references") HTML guides * [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images) * [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet) * [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats) * [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides") Markup languages * [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG) * [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML) * [XML](https://developer.mozilla.org/en-US/docs/Web/XML) CSS [CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS) CSS reference * [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties) * [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors) * [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules) * [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references") CSS guides * [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction) * [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using) * [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts) * [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides") Layout cookbook * [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts) * [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element) * [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card) * [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook) JavaScriptJS [JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript) JS reference * [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects) * [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators) * [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements) * [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references") JS guides * [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling) * [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration) * [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects) * [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes) * [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides") Web APIs [Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API) Web API reference * [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API) * [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) * [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API) * [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API) * [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API) * [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) * [See all…](https://developer.mozilla.org/en-US/docs/Web/API


