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Last updated 2021-09-30 23:04:58
This is a page from the Cascading Style Sheets Working Group Blog. Some other places to find information are the “current work” page, the www-style mailing list, the Future of CSS syndicator, and the issue list on Github.
Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
The CSS Working Group has published an updated Working Draft of CSS Values and Units Level 4. This specification defines the CSS property definition grammar, and the value types that are common across many specs, such as <length> or <string>.
New to this draft is the interpolation function mix() which accepts a percentage representing linear progress between two values. More advanced interpolations are also being discussed for Level 5, see e.g. Issue 6245.
Other changes since the last Working Draft are all listed in the Changes section.
Please send feedback by either commenting or filing an issue in GitHub (preferable) or sending mail to the (archived) public mailing list www-style@w3.org with the spec code ([css-values-4]) and your comment topic in the subject line. (Alternatively, you can message one of the editors and ask them to forward your comment.)