---
title: "About Learn web development - Learn web development | MDN"
chunk: 3/4
source: "https://developer.mozilla.org/en-US/docs/Learn_web_development/About"
category: "reference"
tags: "web, html, css, javascript, documentation"
date_saved: "2026-05-05T05:50:15.977749+00:00"
instance: "kb-cron"
---

**Note:** Educators should use this material as a guide, but its use does not imply endorsement by Mozilla. ##  [Update process](https://developer.mozilla.org/en-US/docs/Learn_web_development/About#update_process)
The web development industry is changing constantly and rapidly. To keep our recommendations current, we will review our material regularly, update our [changelog](https://developer.mozilla.org/en-US/docs/Learn_web_development/Changelog), and make an announcement every year, contacting the creators of known conforming courses to let them know the course has changed and encourage them to review/update their courses as appropriate. We intend to do this in Q2 each year, to give educators time over Q2/Q3 to implement changes before the start of the following academic year. ##  [Frequently asked questions](https://developer.mozilla.org/en-US/docs/Learn_web_development/About#frequently_asked_questions)
###  [Scrimba partnership questions](https://developer.mozilla.org/en-US/docs/Learn_web_development/About#scrimba_partnership_questions)
#### How does MDN know Scrimba's courses are high quality and follow best practices? Scrimba already had a great reputation before we started talking to them about a partnership. However, we didn't just take the community's word for it. We did an extensive review of Scrimba's [Frontend Developer Career Path](https://scrimba.com/the-frontend-developer-career-path-c0j:details?via=mdn) (FDCP) and provided them with feedback on possible improvements, focusing on increasing coverage of best practices and conformance to our [Core modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core). Scrimba implemented all of our feedback, and the FDCP is even better than it was before. Now that it conforms to our Curriculum Core, we are confident it aligns with MDN standards. #### Is MDN sharing user data with Scrimba? We prioritize user privacy and transparency. The only information MDN shares with Scrimba is user navigation to Scrimba from MDN, and this happens through their own actions by following a link that is marked as external. In cases where we embed Scrimba content on MDN, Scrimba won't see user data until a user chooses to interact with Scrimba's content. #### Scrimba's content isn't free. Doesn't this conflict with MDN's philosophy of providing free content? A lot of Scrimba's content requires a paid subscription, but they also offer several complete courses that are free to access after you register. It is also worth pointing out that Scrimba's courses are not necessary to make use of MDN Learn Web Development — they are an enhancement for those who wish to pay for a structured course that covers our curriculum core. You can still learn all our learning outcomes for free by working through our articles. #### Is a certification awarded on completing Scrimba's Frontend Developer Career Path? Yes, once you complete all the topics in the Frontend Developer Career Path, you can access a certificate of completion to share with potential employers or include in your portfolio. See [Where can I find my completion certificate?](https://forum.scrimba.com/t/where-can-i-find-my-completion-certificate/43?via=mdn) for more information. ##  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 28, 2025 by [MDN contributors](https://developer.mozilla.org/en-US/docs/Learn_web_development/About/contributors.txt). [View this page on GitHub](https://github.com/mdn/content/blob/main/files/en-us/learn_web_development/about/index.md?plain=1 "Folder: en-us/learn_web_development/about \(Opens in a new tab\)") • [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%2FLearn_web_development%2FAbout&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%2Flearn_web_development%2Fabout%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FLearn_web_development%2FAbout%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-us%2Flearn_web_development%2Fabout%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Fbe1922d62a0d31e4e3441db0e943aed8df736481%0A*+Document+last+modified%3A+2025-04-28T14%3A28%3A26.000Z%0A%0A%3C%2Fdetails%3E "This will take you to GitHub to file a new issue.")
  1. [Learn web development](https://developer.mozilla.org/en-US/docs/Learn_web_development)
  2. [MDN curriculum](https://developer.mozilla.org/en-US/curriculum/)
  3. [Getting started modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started)
  4. [Environment setup](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup)
    1. [Installing software](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Installing_software)
    2. [Browsing the web](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Browsing_the_web)
    3. [Code editors](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Code_editors)
    4. [Dealing with files](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Dealing_with_files)
    5. [Command line](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Command_line)
  5. [Your first website](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website)
    1. [What will it look like?](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website/What_will_your_website_look_like)
    2. [Creating the content](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Creating_the_content)
    3. [Styling the content](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Styling_the_content)
    4. [Adding interactivity](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Adding_interactivity)
    5. [Publishing](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Publishing_your_website)
  6. [Web standards](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Web_standards)
    1. [How the web works](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Web_standards/How_the_web_works)
    2. [The web standards model](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Web_standards/The_web_standards_model)
    3. [How browsers load websites](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Web_standards/How_browsers_load_websites)
  7. [Soft skills](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Soft_skills)
    1. [Research and learning](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Research_and_learning)
    2. [Collaboration and teamwork](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Collaboration_and_teamwork)
    3. [Workflows and processes](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Workflows_and_processes)
    4. [Finding a job](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Finding_a_job)
  8. [Core modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core)
  9. [Structuring content with HTML](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content)
    1. [Basic HTML syntax](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Basic_HTML_syntax)
    2. [Web page metadata](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Webpage_metadata)
    3. [Headings and paragraphs](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Headings_and_paragraphs)
    4. [Emphasis and importance](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Emphasis_and_importance)
    5. [Lists](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Lists)
    6. [Test: HTML text basics](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/HTML_text_basics)
    7. [Advanced text features](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Advanced_text_features)
    8. [Test: Advanced HTML text](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/Advanced_HTML_text)
    9. [Challenge: Letter markup](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Marking_up_a_letter)
    10. [Structuring documents](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_documents)
    11. [Creating links](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Creating_links)
    12. [Test: Links](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/Links)
    13. [Challenge: Bird watching site](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_a_page_of_content)
    14. [Images](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_images)
    15. [Test: Images](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/Images)
    16. [Video and audio](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_video_and_audio)
    17. [Test: Audio and video](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/Audio_and_video)
    18. [Challenge: Splash page](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Splash_page)
    19. [Table basics](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_table_basics)
    20. [Table accessibility](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Table_accessibility)
    21. [Challenge: Planet data table](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Planet_data_table)
    22. [Forms and buttons](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_forms)
    23. [Test: Forms and buttons](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills/Forms_and_buttons)
    24. [Challenge: Feedback form](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Forms_challenge)
    25. [Debugging HTML](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Debugging_HTML)
    26. [Test: HTML tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Test_your_skills)
    27. Additional tutorials
      1. [Vector graphics](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/Including_vector_graphics_in_HTML)
      2. [Embedding technologies](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content/General_embedding_technologies)
  10. [CSS styling basics](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics)
    1. [What is CSS?](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/What_is_CSS)
    2. [CSS getting started](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Getting_started)
    3. [Challenge: Biography page](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Styling_a_bio_page)
    4. [Basic selectors](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Basic_selectors)
    5. [Attribute selectors](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Attribute_selectors)
    6. [Pseudo-classes and elements](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Pseudo_classes_and_elements)
    7. [Combinators](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Combinators)
    8. [Test: Selectors](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Selectors)
    9. [Box model](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Box_model)
    10. [Test: Box model](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Box_model)
    11. [Handling conflicts](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Handling_conflicts)
    12. [Test: Cascade](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Cascade)
    13. [Challenge: Fixing blog styles](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Fixing_blog_styles)
    14. [Values and units](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Values_and_units)
    15. [Test: Values and units](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Values)
    16. [Sizing](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Sizing)
    17. [Test: Sizing](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Sizing)
    18. [Backgrounds and borders](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Backgrounds_and_borders)
    19. [Test: Backgrounds and borders](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Backgrounds_and_borders)
    20. [Overflow](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Overflow)
    21. [Test: Overflow](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Overflow)
    22. [Challenge: Sizing and decorating](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Size_decorate_content_panel)
    23. [Images, media, forms](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Images_media_forms)
    24. [Test: Images and forms](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills/Images)
    25. [Styling tables](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Tables)
    26. [Challenge: Styling color scheme search](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Home_color_scheme_search)
    27. [Debugging CSS](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Debugging_CSS)
    28. [Test: Styling basics tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Test_your_skills)
    29. Additional tutorials
      1. [Advanced styling effects](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Advanced_styling_effects)
      2. [Cascade layers](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Cascade_layers)
      3. [Multiple text directions](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Handling_different_text_directions)
      4. [Organizing your CSS](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics/Organizing)
  11. [CSS text styling](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling)
    1. [Text and font fundamentals](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling/Fundamentals)
    2. [Styling lists](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling/Styling_lists)
    3. [Styling links](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling/Styling_links)
    4. [Web fonts](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling/Web_fonts)
    5. [Challenge: Community school homepage](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Text_styling/Typesetting_a_homepage)
  12. [CSS layout](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout)
    1. [Introduction](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Introduction)
    2. [Floats](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Floats)
    3. [Test: Floats](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills/Floats)
    4. [Positioning](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Positioning)
    5. [Test: Positioning](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills/Position)
    6. [Flexbox](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Flexbox)
    7. [Test: Flexbox](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills/Flexbox)
    8. [CSS grid layout](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Grids)
    9. [Test: CSS grid](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills/Grid)
    10. [Challenge: Fundamental layout](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Fundamental_Layout_Comprehension)
    11. [Responsive web design](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Responsive_Design)
    12. [Media queries](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Media_queries)
    13. [Test: RWD & media queries](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills/Responsive_design)
    14. [Challenge: mobile-first](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Mobile-first_challenge)
    15. [Test: Layout tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Test_your_skills)
    16. Additional tutorials
      1. [Multiple-column layout](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Multiple-column_Layout)
      2. [Practical positioning examples](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Practical_positioning_examples)
      3. [Legacy layout methods](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Legacy_Layout_Methods)
      4. [Supporting older browsers](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout/Supporting_Older_Browsers)
  13. [Dynamic scripting with JavaScript](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting)
    1. [What is JavaScript?](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/What_is_JavaScript)
    2. [JavaScript walkthrough](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/A_first_splash)
    3. [Troubleshooting](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/What_went_wrong)
    4. [Variables](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Variables)
    5. [Test: Variables](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Variables)
    6. [Numbers and operators](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Math)
    7. [Test: Math](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Math)
    8. [Strings](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Strings)
    9. [String methods](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Useful_string_methods)
    10. [Test: Strings](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Strings)
    11. [Arrays](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Arrays)
    12. [Test: Arrays](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Arrays)
    13. [Challenge: Story generator](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Silly_story_generator)
    14. [Conditionals](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Conditionals)
    15. [Test: Conditionals](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Conditionals)
    16. [Loops](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Loops)
    17. [Test: Loops](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Loops)
    18. [Functions](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Functions)
    19. [Build your own function](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Build_your_own_function)
    20. [Function return values](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Return_values)
    21. [Test: Functions](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Functions)
    22. [Events](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Events)
    23. [Event bubbling](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Event_bubbling)
    24. [Test: Events](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Events)
    25. [Objects](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Object_basics)
    26. [Test: Objects](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/Object_basics)
    27. [DOM scripting](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/DOM_scripting)
    28. [Challenge: Image gallery](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Image_gallery)
    29. [Network requests](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Network_requests)
    30. [JSON](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/JSON)
    31. [Test: JSON](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills/JSON)
    32. [Challenge: House data UI](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/House_data_UI)
    33. [Debugging and error handling](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Debugging_JavaScript)
    34. [Test: JavaScript tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting/Test_your_skills)
  14. [JavaScript frameworks and libraries](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries)
    1. [Introduction](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Introduction)
    2. [Framework features](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Main_features)
    3. [React getting started](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_getting_started)
    4. [React ToDo app](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_todo_list_beginning)
    5. [React components](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_components)
    6. [React events and state](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_events_state)
    7. [React editing, filtering, conditional UI](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_filtering_conditional_rendering)
    8. [React accessibility](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_accessibility)
    9. [React resources](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_resources)
  15. [Accessibility](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility)
    1. [What is accessibility?](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/What_is_accessibility)
    2. [Accessibility tools](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Tooling)
    3. [Accessible HTML](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/HTML)
    4. [Test: HTML a11y](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Test_your_skills/HTML)
    5. [Accessible CSS and JS](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/CSS_and_JavaScript)
    6. [Test: CSS/JS a11y](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Test_your_skills/CSS_and_JavaScript)
    7. [WAI-ARIA](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/WAI-ARIA_basics)
    8. [Test: WAI-ARIA](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Test_your_skills/WAI-ARIA)
    9. [Accessible multimedia](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Multimedia)
    10. [Mobile accessibility](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Mobile)
    11. [Challenge: A11y debugging](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Accessibility_troubleshooting)
    12. [Test: A11y tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Accessibility/Test_your_skills)
  16. [Design for developers](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Design_for_developers)
  17. [Version control](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Version_control)
  18. [Extension modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions)
  19. [Advanced JavaScript objects](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects)
    1. [Object prototypes](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_prototypes)
    2. [Object-oriented programming](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object-oriented_programming)
    3. [Classes in JavaScript](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Classes_in_JavaScript)
    4. [Test: Object-oriented JavaScript](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Test_your_skills/Object-oriented_JavaScript)
    5. [Object building practice](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_building_practice)
    6. [Challenge: Bouncing balls features](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Adding_bouncing_balls_features)
    7. [Test: OOJS tests index](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Test_your_skills)
  20. [Client-side web APIs](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs)
    1. [Introduction](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Introduction)
    2. [Video and audio](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Video_and_audio_APIs)
    3. [Drawing graphics](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Drawing_graphics)
    4. [Client-side storage](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Client-side_storage)
    5. [Third-party APIs](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Third_party_APIs)
  21. [Asynchronous JavaScript](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS)
    1. [Introduction](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing)
    2. [Using promises](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS/Promises)
    3. [Implementing promise-based APIs](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS/Implementing_a_promise-based_API)
    4. [Introducing workers](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing_workers)
    5. [Challenge: Animation sequence](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Async_JS/Sequencing_animations)
  22. [Web forms](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms)
    1. [Your first form](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Your_first_form)
    2. [How to structure a web form](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/How_to_structure_a_web_form)
    3. [Basic native form controls](https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Basic_native_form_controls)
    4.