The Compatibility Standard standardizes a number of (often vendor-prefixed) CSS properties and DOM APIs that web browsers need to support for compatibility with the web.
Code of conduct
We are committed to providing a friendly, safe, and welcoming environment for all. Please read and respect the WHATWG Code of Conduct.
Please add your name to the Acknowledgments section in your first pull request, even for trivial fixes. The names are sorted lexicographically.
For quick local iteration, run
make. To verify your changes locally, run
make deploy. See more
WHATWG Contributor Guidelines.
If you can commit to this repository, see the WHATWG Maintainer Guidelines.
Tests can be found in the
compat/ directory of