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mdn/content

The official source for MDN Web Docs content. Home to over 14,000 pages of documentation about HTML, CSS, JS, HTTP, Web APIs, and more.

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 (10,944 stars)
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 (23,216 forks)
Indexed issues
 (94 indexed issues)
open beginner issues
 (77 open beginner issues)
Latest indexed
Jun 11, 2026
Last GitHub push
Aug 19, 2026
License
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Contributing guide
Contributing guide
Code of conduct
Code of conduct
Dominant language
Markdown
PR merge metrics
 (Avg merge 7d 3h) (147 merged PRs in 30d)
Beginner labels
help wantedgood first issue

Issues

94 indexed issues

Open
Event timeStamp accuracy description is misleading
Content:WebAPIhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #40673 · Aug 8, 2025 · Markdown · 10,944 stars

2 comments0 reactions0 assignees
Open
<aside> implicit role="complementary" is conditional
Content:AccessibilityContent:HTMLhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #40664 · Aug 7, 2025 · Markdown · 10,944 stars

8 comments0 reactions0 assignees
Closed
Mention Firefox Anti-fingerprinting on `getImageData()` page
Content:WebAPIhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #39084 · Apr 11, 2025 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Closed
List other URL-based payment method identifiers
Content:WebAPIhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #38581 · Mar 11, 2025 · Markdown · 10,944 stars

5 comments0 reactions0 assignees
Open
Can't open example on detecting device orientation page
Content:WebAPIarea: Device Orientationhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #38423 · Feb 26, 2025 · Markdown · 10,944 stars

3 comments0 reactions0 assignees
Open
Clarify image.decode() failure on lazy-loaded images
Content:WebAPIarea: DOM/CSSOMhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #38034 · Feb 8, 2025 · Markdown · 10,944 stars

2 comments0 reactions0 assignees
Open
Screenreaders swallow keyboard events
Content:Accessibilityhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #37887 · Jan 30, 2025 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Open
Add missing Wasm docs: Table instructions
Content:wasmdocument not writtenhelp wanted
Why recommendedHas a beginner-friendly label · Repository active this month
Has a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #37855 · Jan 28, 2025 · Markdown · 10,944 stars

3 comments0 reactions1 assignee
Open
Add missing Wasm docs: Reference instructions
Content:wasmdocument not writtenhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #37854 · Jan 28, 2025 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Open
Add missing Wasm docs: Vector/SIMD instructions
Content:wasmdocument not writtenhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #37853 · Jan 28, 2025 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Open
Popover API needs Accessibility Info
Content:WebAPIhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #37465 · Jan 1, 2025 · Markdown · 10,944 stars

1 comment0 reactions0 assignees
Closed
Opus audio codec in MP4 incorectly listed as "mp4a.ad"
Content:Mediagoal: accuracyhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #36771 · Nov 13, 2024 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Open
Update/revert docs on Firefox CSP SVG sprite blocking
Content:HTTPContent:Securityhelp wanted
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #36745 · Nov 11, 2024 · Markdown · 10,944 stars

1 comment1 reaction0 assignees
Open
Inconsistency in dragover event timing information
Content:WebAPIarea: DnDgoal: consistencyhelp wanted
Why recommendedNo assignee yet · No comments yet
No assignee yetNo comments yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #36689 · Nov 7, 2024 · Markdown · 10,944 stars

0 comments0 reactions0 assignees
Open
FontFace doc: sizeAdjust is missing
Content:WebAPIdocument not writtenhelp wantedneeds BCD update
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelRepository active this monthContributing guide available

mdn / content · #36587 · Oct 31, 2024 · Markdown · 10,944 stars

3 comments0 reactions0 assignees