w3c/mathml-core

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MathML Core draft

Stars: 56
Forks: 20
Open beginner issues: 0
Indexed issues: 117

Dominant language: HTML
License: No license data
Last GitHub push: Jul 27, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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117 open issues indexed

Add drawable attribute to MathMLElement Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#341 · 4 comments · 2 reactions · Opened Sep 17, 2026
TODOs for MathML `<a>` element Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

w3c/mathml-core#340 · 1 comment · Opened Aug 31, 2026
Mark 'math-style' and 'math-depth' as "font-affecting properties" Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

w3c/mathml-core#339 · 1 reaction · Opened Aug 18, 2026
Best Practice for Vertical Math (Elementary) Open

accessibility MathML 4

w3c/mathml-core#334 · 15 comments · 2 assignees · Opened Jul 2, 2026
Should <a> element navigate to javascript:-URLs when clicking ? Open

Agenda

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/mathml-core#333 · 13 comments · Opened Jun 24, 2026
Why is the use of `<mphantom>` discouraged? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

w3c/mathml-core#332 · Opened Jun 15, 2026
Poor bounding box for stretched "/" Open

w3c/mathml-core#323 · 1 comment · 1 assignee · Opened May 2, 2026
Add a template for reporting issue Open

Agenda

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

w3c/mathml-core#318 · 3 comments · Opened Mar 23, 2026
Problems with “Root with index” Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#317 · 1 comment · Opened Mar 17, 2026
Unclear how to use `Operators_fence` special table Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

w3c/mathml-core#315 · Opened Mar 12, 2026
Clarify when token elements should fall back to non-MathML layout Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/mathml-core#313 · Opened Mar 2, 2026
Additional spec work for links Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/mathml-core#312 · 11 comments · 1 reaction · Opened Mar 1, 2026
Look into making combining accents work in Chrome Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/mathml-core#311 · 2 comments · Opened Feb 23, 2026
MathML-Core Meeting Agenda, Monday Feb 23, 2026 Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#310 · 2 comments · Opened Feb 20, 2026
Supporting `calc(100% + 0.333em)` in the `width` attribute of `<mpadded>` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#306 · 5 comments · Opened Jan 6, 2026
Cramped subscripts Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#304 · Opened Dec 17, 2025
Intent of MathML-Core B.3 is unclear Open

MathML Core need specification update

w3c/mathml-core#309 · 2 comments · 1 assignee · Opened Dec 5, 2025
Accent gap Open

browser-tracking

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#301 · 1 comment · 1 reaction · Opened Nov 15, 2025
Add note for authors about preventing whitespace trimming and collapsing in `<ms>` elements Open

need specification update needs-tests

Difficulty 1/5 Under an hour Newbie friendliness 68/100

w3c/mathml-core#290 · Opened Jun 25, 2025
Clarify/modify usage of quotes in `<ms>` elements for compatibility with full MathML Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#289 · 1 comment · Opened Jun 25, 2025
infix form missing for `||` operator in Figures 26, 27 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

w3c/mathml-core#287 · Opened May 5, 2025
Operator spacing adjacent to <mtext> Open

needs-tests

Difficulty 4/5 3-5 days Newbie friendliness 35/100

w3c/mathml-core#286 · 10 comments · Opened Mar 12, 2025
Update Implementation report link / verify tests Open

Agenda need specification update

w3c/mathml-core#283 · 1 comment · 1 assignee · Opened Feb 21, 2025
Clarify the language around deprecated features of MathML Open

Agenda

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#279 · 7 comments · Opened Jan 15, 2025
How is inline stretch size constraint determined? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#270 · 7 comments · Opened Dec 14, 2024
Interaction between height and baseline alignment Open

css/html5 MathML Core need specification update

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#259 · 6 comments · Opened Sep 18, 2024
Consider support for the box-sizing property Open

css/html5 MathML Core

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#257 · 2 comments · 1 reaction · Opened Sep 5, 2024
Superscript consistent baseline in rows. Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/mathml-core#255 · 1 comment · Opened Aug 11, 2024
Accent rendering with <mover accent="true"> Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

w3c/mathml-core#254 · 2 comments · 1 reaction · Opened Aug 10, 2024
Be more explicit about how to get a largeop glyph Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#253 · 1 comment · Opened Aug 9, 2024
::before and ::after pseudo-elements Open

level-2

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/mathml-core#247 · 4 comments · Opened Jun 4, 2024
Consider adding menclose to core Open

level-2

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#245 · 23 comments · 1 reaction · Opened May 24, 2024
Support `.ownerMathElement` (or something akin to it) Open

level-2

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#241 · 5 comments · Opened Apr 30, 2024
[interop] Text fragments + MathML Open

w3c/mathml-core#240 · 4 comments · 1 reaction · 1 assignee · Opened Apr 28, 2024
Add more details to the stretchy algorithm Open

need specification update

w3c/mathml-core#238 · 7 comments · 1 assignee · Opened Apr 17, 2024
Define that (and how) glyph assemblies are mirrored in rtl formulas Open

level-2

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#235 · 3 comments · Opened Apr 9, 2024
Whether/when to mirror operators Open

level-2

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#233 · 4 comments · Opened Apr 9, 2024
lspace/rspace have confusing names Open

need specification update

w3c/mathml-core#232 · 7 comments · 1 reaction · 1 assignee · Opened Apr 9, 2024
minsize adjustment when target size T = Tascent + Tdescent ≤ 0 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/mathml-core#230 · Opened Apr 5, 2024
Native MathML rendering problems Open

browser-tracking

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#229 · 18 comments · Opened Apr 4, 2024
MathML support in the HTML Sanitizer API Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

w3c/mathml-core#227 · 25 comments · Opened Mar 25, 2024
Draft: Check against APA FAST Review Checklist Open

meta-tracking

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#222 · Opened Feb 26, 2024
Searching or matching text Open

i18n-tracker

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#220 · 3 comments · Opened Feb 7, 2024
Draft: Check against i18n Review Checklist Open

meta-tracking

Difficulty 4/5 3-5 days Newbie friendliness 35/100

w3c/mathml-core#219 · Opened Feb 7, 2024
Idea: Consider introducing CSS math-leading-space / math-trailing-space properties Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#218 · 5 comments · Opened Feb 5, 2024
Interpretation of spaceAfterScript for mmultiscripts's prescripts Open

css/html5 need tests needs-tests opentype/tex

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/mathml-core#217 · 15 comments · Opened Jan 26, 2024
Misaligned brackets Open

implementation

Difficulty 3/5 1-2 days Newbie friendliness 30/100

w3c/mathml-core#215 · 7 comments · Opened Jan 22, 2024
munder, mover, munderover: needs clarity in spec and consistency in implementation Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#213 · 3 comments · Opened Nov 27, 2023
reflowing content inside MathML token elements Open

Agenda level-2

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/mathml-core#208 · 1 comment · Opened Oct 3, 2023
Should we say that application/mathml+xml is a MIME type supported by browsers? Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

w3c/mathml-core#204 · 7 comments · Opened Jul 31, 2023

w3c/mathml-core

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