# kb

id: repaint-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Repaint-1.md
category: reference
title: Repaint - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Repaint
date_saved: 2026-05-05T05:42:38.846764+00:00
instance: kb-cron
parent: repaint-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/Repaint/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/repaint/index.md?plain=1 "Folder: en-us/glossary/repaint \(Opens in a new tab\)") • [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%2FRepaint&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%2Frepaint%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRepaint%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frepaint%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: repaint-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Repaint-2.md
category: reference
title: Repaint - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Repaint
date_saved: 2026-05-05T05:42:38.846764+00:00
instance: kb-cron
parent: repaint-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. _[Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint)_ 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: replaced-elements-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Replaced_elements-0.md
category: reference
title: Replaced elements - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements
date_saved: 2026-05-05T05:42:41.580983+00:00
instance: kb-cron
parent: replaced-elements-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements#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: replaced-elements-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Replaced_elements-1.md
category: reference
title: Replaced elements - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements
date_saved: 2026-05-05T05:42:41.580983+00:00
instance: kb-cron
parent: replaced-elements-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/Replaced_elements/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/replaced_elements/index.md?plain=1 "Folder: en-us/glossary/replaced_elements \(Opens in a new tab\)") • [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%2FReplaced_elements&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%2Freplaced_elements%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FReplaced_elements%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Freplaced_elements%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: replaced-elements-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Replaced_elements-2.md
category: reference
title: Replaced elements - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements
date_saved: 2026-05-05T05:42:41.580983+00:00
instance: kb-cron
parent: replaced-elements-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. _[Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements)_ 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: replay-attack-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Replay_attack-0.md
category: reference
title: Replay attack - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack
date_saved: 2026-05-05T05:42:44.172313+00:00
instance: kb-cron
parent: replay-attack-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack#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: replay-attack-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Replay_attack-1.md
category: reference
title: Replay attack - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack
date_saved: 2026-05-05T05:42:44.172313+00:00
instance: kb-cron
parent: replay-attack-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 Dec 15, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/replay_attack/index.md?plain=1 "Folder: en-us/glossary/replay_attack \(Opens in a new tab\)") • [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%2FReplay_attack&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%2Freplay_attack%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FReplay_attack%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Freplay_attack%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Fdc788bf0ea36cb1ebe809c82aaae2c77cb3e18c0%0A*+Document+last+modified%3A+2025-12-15T07%3A46%3A57.000Z%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: replay-attack-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Replay_attack-2.md
category: reference
title: Replay attack - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack
date_saved: 2026-05-05T05:42:44.172313+00:00
instance: kb-cron
parent: replay-attack-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. _[Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack)_ 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: repo-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Repo-0.md
category: reference
title: Repo - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Repo
date_saved: 2026-05-05T05:42:46.649871+00:00
instance: kb-cron
parent: repo-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Repo#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Repo#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: repo-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Repo-1.md
category: reference
title: Repo - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Repo
date_saved: 2026-05-05T05:42:46.649871+00:00
instance: kb-cron
parent: repo-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/Repo/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/repo/index.md?plain=1 "Folder: en-us/glossary/repo \(Opens in a new tab\)") • [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%2FRepo&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%2Frepo%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRepo%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frepo%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: repo-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Repo-2.md
category: reference
title: Repo - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Repo
date_saved: 2026-05-05T05:42:46.649871+00:00
instance: kb-cron
parent: repo-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. _[Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo)_ 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: reporting-directive-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Reporting_directive-0.md
category: reference
title: Reporting directive - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive
date_saved: 2026-05-05T05:42:49.084700+00:00
instance: kb-cron
parent: reporting-directive-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive#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: reporting-directive-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Reporting_directive-1.md
category: reference
title: Reporting directive - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive
date_saved: 2026-05-05T05:42:49.084700+00:00
instance: kb-cron
parent: reporting-directive-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/Reporting_directive/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/reporting_directive/index.md?plain=1 "Folder: en-us/glossary/reporting_directive \(Opens in a new tab\)") • [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%2FReporting_directive&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%2Freporting_directive%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FReporting_directive%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Freporting_directive%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: reporting-directive-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Reporting_directive-2.md
category: reference
title: Reporting directive - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive
date_saved: 2026-05-05T05:42:49.084700+00:00
instance: kb-cron
parent: reporting-directive-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. _[Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive)_ 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: representation-header-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Representation_header-0.md
category: reference
title: Representation header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Representation_header
date_saved: 2026-05-05T05:42:51.537182+00:00
instance: kb-cron
parent: representation-header-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header#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: representation-header-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Representation_header-1.md
category: reference
title: Representation header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Representation_header
date_saved: 2026-05-05T05:42:51.537182+00:00
instance: kb-cron
parent: representation-header-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/Representation_header/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/representation_header/index.md?plain=1 "Folder: en-us/glossary/representation_header \(Opens in a new tab\)") • [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%2FRepresentation_header&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%2Frepresentation_header%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRepresentation_header%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frepresentation_header%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: representation-header-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Representation_header-2.md
category: reference
title: Representation header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Representation_header
date_saved: 2026-05-05T05:42:51.537182+00:00
instance: kb-cron
parent: representation-header-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. _[Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header)_ 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: request-header-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Request_header-0.md
category: reference
title: Request header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Request_header
date_saved: 2026-05-05T05:42:53.981590+00:00
instance: kb-cron
parent: request-header-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Request_header#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Request_header#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: request-header-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Request_header-1.md
category: reference
title: Request header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Request_header
date_saved: 2026-05-05T05:42:53.981590+00:00
instance: kb-cron
parent: request-header-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/Request_header/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/request_header/index.md?plain=1 "Folder: en-us/glossary/request_header \(Opens in a new tab\)") • [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%2FRequest_header&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%2Frequest_header%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRequest_header%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frequest_header%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: request-header-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Request_header-2.md
category: reference
title: Request header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Request_header
date_saved: 2026-05-05T05:42:53.981590+00:00
instance: kb-cron
parent: request-header-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. _[Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header)_ 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: resource-timing-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Resource_Timing-0.md
category: reference
title: Resource Timing - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing
date_saved: 2026-05-05T05:42:57.005140+00:00
instance: kb-cron
parent: resource-timing-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing#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: resource-timing-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Resource_Timing-1.md
category: reference
title: Resource Timing - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing
date_saved: 2026-05-05T05:42:57.005140+00:00
instance: kb-cron
parent: resource-timing-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/Resource_Timing/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/resource_timing/index.md?plain=1 "Folder: en-us/glossary/resource_timing \(Opens in a new tab\)") • [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%2FResource_Timing&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%2Fresource_timing%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FResource_Timing%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fresource_timing%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: resource-timing-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Resource_Timing-2.md
category: reference
title: Resource Timing - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing
date_saved: 2026-05-05T05:42:57.005140+00:00
instance: kb-cron
parent: resource-timing-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. _[Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing)_ 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: response-header-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Response_header-0.md
category: reference
title: Response header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Response_header
date_saved: 2026-05-05T05:42:59.418956+00:00
instance: kb-cron
parent: response-header-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Response_header#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Response_header#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: response-header-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Response_header-1.md
category: reference
title: Response header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Response_header
date_saved: 2026-05-05T05:42:59.418956+00:00
instance: kb-cron
parent: response-header-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 28, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Response_header/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/response_header/index.md?plain=1 "Folder: en-us/glossary/response_header \(Opens in a new tab\)") • [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%2FResponse_header&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%2Fresponse_header%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FResponse_header%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fresponse_header%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F099a15b4234071958980dcae0e122a7145fdbdfa%0A*+Document+last+modified%3A+2025-07-28T03%3A46%3A54.000Z%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: response-header-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Response_header-2.md
category: reference
title: Response header - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Response_header
date_saved: 2026-05-05T05:42:59.418956+00:00
instance: kb-cron
parent: response-header-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. _[Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header)_ 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: responsive-web-design-rwd-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design-0.md
category: reference
title: Responsive Web Design (RWD) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design
date_saved: 2026-05-05T05:43:02.044891+00:00
instance: kb-cron
parent: responsive-web-design-rwd-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design#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: responsive-web-design-rwd-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design-1.md
category: reference
title: Responsive Web Design (RWD) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design
date_saved: 2026-05-05T05:43:02.044891+00:00
instance: kb-cron
parent: responsive-web-design-rwd-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 18, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/responsive_web_design/index.md?plain=1 "Folder: en-us/glossary/responsive_web_design \(Opens in a new tab\)") • [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%2FResponsive_web_design&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%2Fresponsive_web_design%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FResponsive_web_design%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fresponsive_web_design%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F13839b2979cc244034ffb1fe243240778b0cd23f%0A*+Document+last+modified%3A+2025-07-18T15%3A04%3A24.000Z%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: responsive-web-design-rwd-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design-2.md
category: reference
title: Responsive Web Design (RWD) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design
date_saved: 2026-05-05T05:43:02.044891+00:00
instance: kb-cron
parent: responsive-web-design-rwd-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. _[Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design)_ 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: robots-txt-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Robots.txt-0.md
category: reference
title: Robots.txt - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt
date_saved: 2026-05-05T05:43:04.860870+00:00
instance: kb-cron
parent: robots-txt-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt#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: robots-txt-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Robots.txt-1.md
category: reference
title: Robots.txt - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt
date_saved: 2026-05-05T05:43:04.860870+00:00
instance: kb-cron
parent: robots-txt-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 26, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/robots.txt/index.md?plain=1 "Folder: en-us/glossary/robots.txt \(Opens in a new tab\)") • [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%2FRobots.txt&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%2Frobots.txt%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRobots.txt%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frobots.txt%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F01768f6dcc74acdbd32d2e91512939003b86ac6c%0A*+Document+last+modified%3A+2025-11-26T01%3A16%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: robots-txt-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Robots.txt-2.md
category: reference
title: Robots.txt - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt
date_saved: 2026-05-05T05:43:04.860870+00:00
instance: kb-cron
parent: robots-txt-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. _[Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt)_ 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: round-trip-time-rtt-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time-0.md
category: reference
title: Round Trip Time (RTT) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time
date_saved: 2026-05-05T05:43:08.325739+00:00
instance: kb-cron
parent: round-trip-time-rtt-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time#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: round-trip-time-rtt-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time-1.md
category: reference
title: Round Trip Time (RTT) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time
date_saved: 2026-05-05T05:43:08.325739+00:00
instance: kb-cron
parent: round-trip-time-rtt-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 6, 2026 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/round_trip_time/index.md?plain=1 "Folder: en-us/glossary/round_trip_time \(Opens in a new tab\)") • [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%2FRound_Trip_Time&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%2Fround_trip_time%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRound_Trip_Time%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fround_trip_time%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Ff796ce2e42e778743c5e961135cf4841d8a9b7c4%0A*+Document+last+modified%3A+2026-04-06T03%3A23%3A54.000Z%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: round-trip-time-rtt-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time-2.md
category: reference
title: Round Trip Time (RTT) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time
date_saved: 2026-05-05T05:43:08.325739+00:00
instance: kb-cron
parent: round-trip-time-rtt-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. _[Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time)_ 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: router-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Router-0.md
category: reference
title: Router - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Router
date_saved: 2026-05-05T05:43:10.829634+00:00
instance: kb-cron
parent: router-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Router#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Router#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: router-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Router-1.md
category: reference
title: Router - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Router
date_saved: 2026-05-05T05:43:10.829634+00:00
instance: kb-cron
parent: router-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/Router/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/router/index.md?plain=1 "Folder: en-us/glossary/router \(Opens in a new tab\)") • [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%2FRouter&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%2Frouter%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRouter%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frouter%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: router-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Router-2.md
category: reference
title: Router - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Router
date_saved: 2026-05-05T05:43:10.829634+00:00
instance: kb-cron
parent: router-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. _[Router](https://developer.mozilla.org/en-US/docs/Glossary/Router)_ 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: rsync-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Rsync-0.md
category: reference
title: Rsync - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Rsync
date_saved: 2026-05-05T05:43:13.551482+00:00
instance: kb-cron
parent: rsync-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Rsync#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Rsync#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: rsync-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Rsync-1.md
category: reference
title: Rsync - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Rsync
date_saved: 2026-05-05T05:43:13.551482+00:00
instance: kb-cron
parent: rsync-glossary-mdn-20260505-0
summary:
You can also make a connection over SSH using the `-e` option as shown: There are numerous examples on the Internet, including those at the [official website](https://rsync.samba.org/examples.html), and at the [Wikipedia entry](https://en.wikipedia.org/wiki/Rsync#Examples) for rsync. ## 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/Rsync/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/rsync/index.md?plain=1 "Folder: en-us/glossary/rsync \(Opens in a new tab\)") • [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%2FRsync&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%2Frsync%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRsync%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Frsync%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.


id: rsync-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Rsync-2.md
category: reference
title: Rsync - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Rsync
date_saved: 2026-05-05T05:43:13.551482+00:00
instance: kb-cron
parent: rsync-glossary-mdn-20260505-0
summary:
[QUIC](https://developer.mozilla.org/en-US/docs/Glossary/QUIC) 409. [RAIL](https://developer.mozilla.org/en-US/docs/Glossary/RAIL) 410. [Random Number Generator](https://developer.mozilla.org/en-US/docs/Glossary/RNG) 411. [Raster image](https://developer.mozilla.org/en-US/docs/Glossary/Raster_image) 412. [Rate limit](https://developer.mozilla.org/en-US/docs/Glossary/Rate_limit) 413. [RDF](https://developer.mozilla.org/en-US/docs/Glossary/RDF) 414. [Reading order](https://developer.mozilla.org/en-US/docs/Glossary/Reading_order) 415. [Real User Monitoring (RUM)](https://developer.mozilla.org/en-US/docs/Glossary/Real_User_Monitoring) 416. [Recursion](https://developer.mozilla.org/en-US/docs/Glossary/Recursion) 417. [Reflow](https://developer.mozilla.org/en-US/docs/Glossary/Reflow) 418. [Registrable domain](https://developer.mozilla.org/en-US/docs/Glossary/Registrable_domain) 419. [Regular expression](https://developer.mozilla.org/en-US/docs/Glossary/Regular_expression) 420. [Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. _[Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync)_ 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy)


id: ruby-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/Ruby-0.md
category: reference
title: Ruby - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Ruby
date_saved: 2026-05-05T05:43:16.044602+00:00
instance: kb-cron
parent: ruby-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/Ruby#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/Ruby#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: ruby-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/Ruby-1.md
category: reference
title: Ruby - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Ruby
date_saved: 2026-05-05T05:43:16.044602+00:00
instance: kb-cron
parent: ruby-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 Feb 5, 2026 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Glossary/Ruby/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/ruby/index.md?plain=1 "Folder: en-us/glossary/ruby \(Opens in a new tab\)") • [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%2FRuby&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%2Fruby%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FRuby%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fruby%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F038bda33048810c222cc32b71f52f14d53495a1d%0A*+Document+last+modified%3A+2026-02-05T13%3A56%3A05.000Z%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: ruby-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/Ruby-2.md
category: reference
title: Ruby - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/Ruby
date_saved: 2026-05-05T05:43:16.044602+00:00
instance: kb-cron
parent: ruby-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. _[Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby)_ 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: scm-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SCM-0.md
category: reference
title: SCM - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCM
date_saved: 2026-05-05T05:43:26.618838+00:00
instance: kb-cron
parent: scm-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SCM#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SCM#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: scm-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SCM-1.md
category: reference
title: SCM - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCM
date_saved: 2026-05-05T05:43:26.618838+00:00
instance: kb-cron
parent: scm-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/SCM/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/scm/index.md?plain=1 "Folder: en-us/glossary/scm \(Opens in a new tab\)") • [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%2FSCM&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%2Fscm%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSCM%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fscm%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: scm-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SCM-2.md
category: reference
title: SCM - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCM
date_saved: 2026-05-05T05:43:26.618838+00:00
instance: kb-cron
parent: scm-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. _[SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM)_ 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: sctp-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SCTP-0.md
category: reference
title: SCTP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCTP
date_saved: 2026-05-05T05:43:29.057330+00:00
instance: kb-cron
parent: sctp-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SCTP#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SCTP#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: sctp-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SCTP-1.md
category: reference
title: SCTP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCTP
date_saved: 2026-05-05T05:43:29.057330+00:00
instance: kb-cron
parent: sctp-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/SCTP/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sctp/index.md?plain=1 "Folder: en-us/glossary/sctp \(Opens in a new tab\)") • [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%2FSCTP&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%2Fsctp%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSCTP%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsctp%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: sctp-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SCTP-2.md
category: reference
title: SCTP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SCTP
date_saved: 2026-05-05T05:43:29.057330+00:00
instance: kb-cron
parent: sctp-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. _[SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP)_ 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: sdk-software-development-kit-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SDK-0.md
category: reference
title: SDK (Software Development Kit) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDK
date_saved: 2026-05-05T05:43:31.579918+00:00
instance: kb-cron
parent: sdk-software-development-kit-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SDK#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SDK#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: sdk-software-development-kit-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SDK-1.md
category: reference
title: SDK (Software Development Kit) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDK
date_saved: 2026-05-05T05:43:31.579918+00:00
instance: kb-cron
parent: sdk-software-development-kit-glossary-mdn-20260505-0
summary:
SDKs are usually provided by the owner of a software platform, to support developers targeting the platform. For example, Google provides an [Android SDK](https://developer.android.com/studio) for developers writing Android apps. In many respects, the [developer tools](https://developer.mozilla.org/en-US/docs/Glossary/Developer_Tools) built into modern web browsers provide a similar function for web developers. ## 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/SDK/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sdk/index.md?plain=1 "Folder: en-us/glossary/sdk \(Opens in a new tab\)") • [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%2FSDK&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%2Fsdk%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSDK%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsdk%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)


id: sdk-software-development-kit-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SDK-2.md
category: reference
title: SDK (Software Development Kit) - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDK
date_saved: 2026-05-05T05:43:31.579918+00:00
instance: kb-cron
parent: sdk-software-development-kit-glossary-mdn-20260505-0
summary:
[Pseudo-element](https://developer.mozilla.org/en-US/docs/Glossary/Pseudo-element) 403. [Pseudocode](https://developer.mozilla.org/en-US/docs/Glossary/Pseudocode) 404. [Public-key cryptography](https://developer.mozilla.org/en-US/docs/Glossary/Public-key_cryptography) 405. [Python](https://developer.mozilla.org/en-US/docs/Glossary/Python) 406. [Quality values](https://developer.mozilla.org/en-US/docs/Glossary/Quality_values) 407. [Quaternion](https://developer.mozilla.org/en-US/docs/Glossary/Quaternion) 408. [QUIC](https://developer.mozilla.org/en-US/docs/Glossary/QUIC) 409. [RAIL](https://developer.mozilla.org/en-US/docs/Glossary/RAIL) 410. [Random Number Generator](https://developer.mozilla.org/en-US/docs/Glossary/RNG) 411. [Raster image](https://developer.mozilla.org/en-US/docs/Glossary/Raster_image) 412. [Rate limit](https://developer.mozilla.org/en-US/docs/Glossary/Rate_limit) 413. [RDF](https://developer.mozilla.org/en-US/docs/Glossary/RDF) 414. [Reading order](https://developer.mozilla.org/en-US/docs/Glossary/Reading_order) 415. [Real User Monitoring (RUM)](https://developer.mozilla.org/en-US/docs/Glossary/Real_User_Monitoring) 416. [Recursion](https://developer.mozilla.org/en-US/docs/Glossary/Recursion) 417. [Reflow](https://developer.mozilla.org/en-US/docs/Glossary/Reflow) 418. [Registrable domain](https://developer.mozilla.org/en-US/docs/Glossary/Registrable_domain) 419. [Regular expression](https://developer.mozilla.org/en-US/docs/Glossary/Regular_expression) 420. [Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. _[SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK)_ 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470.


id: sdp-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SDP-0.md
category: reference
title: SDP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDP
date_saved: 2026-05-05T05:43:34.037830+00:00
instance: kb-cron
parent: sdp-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SDP#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SDP#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: sdp-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SDP-1.md
category: reference
title: SDP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDP
date_saved: 2026-05-05T05:43:34.037830+00:00
instance: kb-cron
parent: sdp-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/SDP/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sdp/index.md?plain=1 "Folder: en-us/glossary/sdp \(Opens in a new tab\)") • [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%2FSDP&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%2Fsdp%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSDP%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsdp%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: sdp-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SDP-2.md
category: reference
title: SDP - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SDP
date_saved: 2026-05-05T05:43:34.037830+00:00
instance: kb-cron
parent: sdp-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. _[SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP)_ 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: seo-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SEO-0.md
category: reference
title: SEO - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SEO
date_saved: 2026-05-05T05:43:36.474014+00:00
instance: kb-cron
parent: seo-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SEO#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SEO#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: seo-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SEO-1.md
category: reference
title: SEO - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SEO
date_saved: 2026-05-05T05:43:36.474014+00:00
instance: kb-cron
parent: seo-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/SEO/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/seo/index.md?plain=1 "Folder: en-us/glossary/seo \(Opens in a new tab\)") • [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%2FSEO&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%2Fseo%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSEO%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fseo%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: seo-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SEO-2.md
category: reference
title: SEO - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SEO
date_saved: 2026-05-05T05:43:36.474014+00:00
instance: kb-cron
parent: seo-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. _[SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO)_ 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: sgml-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SGML-0.md
category: reference
title: SGML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SGML
date_saved: 2026-05-05T05:43:38.993716+00:00
instance: kb-cron
parent: sgml-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SGML#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SGML#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: sgml-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SGML-1.md
category: reference
title: SGML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SGML
date_saved: 2026-05-05T05:43:38.993716+00:00
instance: kb-cron
parent: sgml-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/SGML/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sgml/index.md?plain=1 "Folder: en-us/glossary/sgml \(Opens in a new tab\)") • [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%2FSGML&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%2Fsgml%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSGML%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsgml%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: sgml-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SGML-2.md
category: reference
title: SGML - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SGML
date_saved: 2026-05-05T05:43:38.993716+00:00
instance: kb-cron
parent: sgml-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. _[SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML)_ 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: simd-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SIMD-0.md
category: reference
title: SIMD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SIMD
date_saved: 2026-05-05T05:43:41.699382+00:00
instance: kb-cron
parent: simd-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SIMD#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SIMD#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: simd-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SIMD-1.md
category: reference
title: SIMD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SIMD
date_saved: 2026-05-05T05:43:41.699382+00:00
instance: kb-cron
parent: simd-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/SIMD/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/simd/index.md?plain=1 "Folder: en-us/glossary/simd \(Opens in a new tab\)") • [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%2FSIMD&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%2Fsimd%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSIMD%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsimd%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: simd-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SIMD-2.md
category: reference
title: SIMD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SIMD
date_saved: 2026-05-05T05:43:41.699382+00:00
instance: kb-cron
parent: simd-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. _[SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD)_ 478. [SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD) 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: sisd-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SISD-0.md
category: reference
title: SISD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SISD
date_saved: 2026-05-05T05:43:44.365616+00:00
instance: kb-cron
parent: sisd-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SISD#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SISD#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: sisd-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SISD-1.md
category: reference
title: SISD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SISD
date_saved: 2026-05-05T05:43:44.365616+00:00
instance: kb-cron
parent: sisd-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/SISD/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sisd/index.md?plain=1 "Folder: en-us/glossary/sisd \(Opens in a new tab\)") • [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%2FSISD&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%2Fsisd%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSISD%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsisd%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: sisd-glossary-mdn-20260505-2
file: data/developer.mozilla.org/en-US/docs/Glossary/SISD-2.md
category: reference
title: SISD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SISD
date_saved: 2026-05-05T05:43:44.365616+00:00
instance: kb-cron
parent: sisd-glossary-mdn-20260505-0
summary:
[Relying party](https://developer.mozilla.org/en-US/docs/Glossary/Relying_party) 421. [Render-blocking](https://developer.mozilla.org/en-US/docs/Glossary/Render_blocking) 422. [Repaint](https://developer.mozilla.org/en-US/docs/Glossary/Repaint) 423. [Replaced elements](https://developer.mozilla.org/en-US/docs/Glossary/Replaced_elements) 424. [Replay attack](https://developer.mozilla.org/en-US/docs/Glossary/Replay_attack) 425. [Repo](https://developer.mozilla.org/en-US/docs/Glossary/Repo) 426. [Reporting directive](https://developer.mozilla.org/en-US/docs/Glossary/Reporting_directive) 427. [Representation header](https://developer.mozilla.org/en-US/docs/Glossary/Representation_header) 428. [Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request_header) 429. [Resource Timing](https://developer.mozilla.org/en-US/docs/Glossary/Resource_Timing) 430. [Response header](https://developer.mozilla.org/en-US/docs/Glossary/Response_header) 431. [Responsive Web Design (RWD)](https://developer.mozilla.org/en-US/docs/Glossary/Responsive_web_design) 432. [REST](https://developer.mozilla.org/en-US/docs/Glossary/REST) 433. [RGB](https://developer.mozilla.org/en-US/docs/Glossary/RGB) 434. [RIL](https://developer.mozilla.org/en-US/docs/Glossary/RIL) 435. [Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) 436. [Round Trip Time (RTT)](https://developer.mozilla.org/en-US/docs/Glossary/Round_Trip_Time) 437. [Router](https://developer.mozilla.org/en-US/docs/Glossary/Router) 438. [RSS](https://developer.mozilla.org/en-US/docs/Glossary/RSS) 439. [Rsync](https://developer.mozilla.org/en-US/docs/Glossary/Rsync) 440. [RTCP (RTP Control Protocol)](https://developer.mozilla.org/en-US/docs/Glossary/RTCP) 441. [RTF](https://developer.mozilla.org/en-US/docs/Glossary/RTF) 442. [RTL (Right to Left)](https://developer.mozilla.org/en-US/docs/Glossary/RTL) 443. [RTP (Real-time Transport Protocol) and SRTP (Secure RTP)](https://developer.mozilla.org/en-US/docs/Glossary/RTP) 444. [RTSP: Real-time streaming protocol](https://developer.mozilla.org/en-US/docs/Glossary/RTSP) 445. [Ruby](https://developer.mozilla.org/en-US/docs/Glossary/Ruby) 446. [Safe](https://developer.mozilla.org/en-US/docs/Glossary/Safe) 1. [Safe (HTTP Methods)](https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP) 447. [Salt](https://developer.mozilla.org/en-US/docs/Glossary/Salt) 448. [Same-origin policy](https://developer.mozilla.org/en-US/docs/Glossary/Same-origin_policy) 449. [SCM](https://developer.mozilla.org/en-US/docs/Glossary/SCM) 450. [Scope](https://developer.mozilla.org/en-US/docs/Glossary/Scope) 451. [Screen reader](https://developer.mozilla.org/en-US/docs/Glossary/Screen_reader) 452. [Script-supporting element](https://developer.mozilla.org/en-US/docs/Glossary/Script-supporting_element) 453. [Scroll boundary](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_boundary) 454. [Scroll chaining](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_chaining) 455. [Scroll container](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_container) 456. [Scroll snap](https://developer.mozilla.org/en-US/docs/Glossary/Scroll_snap) 457. [SCTP](https://developer.mozilla.org/en-US/docs/Glossary/SCTP) 458. [SDK (Software Development Kit)](https://developer.mozilla.org/en-US/docs/Glossary/SDK) 459. [SDP](https://developer.mozilla.org/en-US/docs/Glossary/SDP) 460. [Search engine](https://developer.mozilla.org/en-US/docs/Glossary/Search_engine) 461. [Secure context](https://developer.mozilla.org/en-US/docs/Glossary/Secure_Context) 462. [Secure Sockets Layer (SSL)](https://developer.mozilla.org/en-US/docs/Glossary/SSL) 463. [Selector (CSS)](https://developer.mozilla.org/en-US/docs/Glossary/CSS_Selector) 464. [Semantics](https://developer.mozilla.org/en-US/docs/Glossary/Semantics) 465. [SEO](https://developer.mozilla.org/en-US/docs/Glossary/SEO) 466. [Serializable object](https://developer.mozilla.org/en-US/docs/Glossary/Serializable_object) 467. [Serialization](https://developer.mozilla.org/en-US/docs/Glossary/Serialization) 468. [Server](https://developer.mozilla.org/en-US/docs/Glossary/Server) 469. [Server Timing](https://developer.mozilla.org/en-US/docs/Glossary/Server_Timing) 470. [Server-side rendering (SSR)](https://developer.mozilla.org/en-US/docs/Glossary/SSR) 471. [Session hijacking](https://developer.mozilla.org/en-US/docs/Glossary/Session_Hijacking) 472. [SGML](https://developer.mozilla.org/en-US/docs/Glossary/SGML) 473. [Shadow tree](https://developer.mozilla.org/en-US/docs/Glossary/Shadow_tree) 474. [Shallow copy](https://developer.mozilla.org/en-US/docs/Glossary/Shallow_copy) 475. [Shim](https://developer.mozilla.org/en-US/docs/Glossary/Shim) 476. [Signature](https://developer.mozilla.org/en-US/docs/Glossary/Signature) 1. [Signature (functions)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Function) 2. [Signature (security)](https://developer.mozilla.org/en-US/docs/Glossary/Signature/Security) 477. [SIMD](https://developer.mozilla.org/en-US/docs/Glossary/SIMD) 478. _[SISD](https://developer.mozilla.org/en-US/docs/Glossary/SISD)_ 479. [Site](https://developer.mozilla.org/en-US/docs/Glossary/Site) 480. [Site map](https://developer.mozilla.org/en-US/docs/Glossary/Site_map) 481. [SLD](https://developer.mozilla.org/en-US/docs/Glossary/SLD) 482. [Sloppy mode](https://developer.mozilla.org/en-US/docs/Glossary/Sloppy_mode) 483. [Slug](https://developer.mozilla.org/en-US/docs/Glossary/Slug) 484. [Smoke test](https://developer.mozilla.org/en-US/docs/Glossary/Smoke_Test) 485. [SMPTE (Society of Motion


id: sld-glossary-mdn-20260505-0
file: data/developer.mozilla.org/en-US/docs/Glossary/SLD-0.md
category: reference
title: SLD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SLD
date_saved: 2026-05-05T05:43:46.755605+00:00
instance: kb-cron
parent: sld-glossary-mdn-20260505-0
summary:
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/SLD#content) * [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/SLD#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: sld-glossary-mdn-20260505-1
file: data/developer.mozilla.org/en-US/docs/Glossary/SLD-1.md
category: reference
title: SLD - Glossary | MDN
tags: web, html, css, javascript, documentation
source_url: https://developer.mozilla.org/en-US/docs/Glossary/SLD
date_saved: 2026-05-05T05:43:46.755605+00:00
instance: kb-cron
parent: sld-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/SLD/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/glossary/sld/index.md?plain=1 "Folder: en-us/glossary/sld \(Opens in a new tab\)") • [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%2FSLD&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%2Fsld%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FGlossary%2FSLD%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Fglossary%2Fsld%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


