CSS Custom Functions and Mixins

The CSS working group (CSSWG) has decided to start working on an Editor's Draft (ED) about CSS Custom Functions and Mixins. These two may be the last big advantages that CSS preprocessors like Sass have over vanilla CSS.

• https://github.com/w3c/csswg-drafts/issues/9350
  • #issuecomment-1939628591
• https://css.oddbird.net/sasslike/mixins-functions/
• https://wiki.csswg.org/spec/process