markup-validator
https://github.com/w3c/markup-validator
HTML
Triage Issues!
When you volunteer to triage issues, you'll receive an email each day with a link to an open issue that needs help in this project. You'll also receive instructions on how to triage issues.
Triage Docs!
Receive a documented method or class from your favorite GitHub repos in your inbox every day. If you're really pro, receive undocumented methods or classes and supercharge your commit history.
HTML not yet supported1 Subscribers
Add a CodeTriage badge to markup-validator
Help out
- Issues
- Native radio within ARIA radio passes validator
- https://validator.w3.org/check?uri=referer checks random page totally unrelated to the actual referring page
- warning: failed to load external entity "http://www.w3.org/TR/MathML2/dtd/isonum.ent"
- Wrong unicode domain name decoding
- https://validator.w3.org/check?uri=referer no longer (?) checking actual referer, but my homepage
- HTML snippet for "valid" Icon(s) on your Web page
- Error 404
- html custom-elements broken in head section.
- Attributes aria-posinset and aria-setsize not allowed on element a at this point.
- Warn about obsolete shortcut icon in favicon spec
- Docs
- HTML not yet supported