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Last updated 2020-11-11 20:17:56
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 WG has published an updated Working Draft of CSS Values & Units Level 4. This specification defines the CSS property definition grammar, and the value types that are common across many specs, such as <number> or <string>.
Significant changes since the previous (2019) Working Draft are listed Changes section. New to this draft is:
aspect-ratio media query and re-used in the new aspect-ratio property in CSS Box Sizing Level 4.
round(), sin(), pow(), and some accompanying numeric constants
src() function, which is identical to url() but requires quoted strings (which makes it possible for it to take functions that evaluate to strings, such as attr() or var()).
attr() function (with some substantial pending issues)
Please send feedback by either 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 email one of the editors and ask them to forward your comment.)