W3C Invites Implementations of CSS Custom Properties for Cascading Variables Module Level 1

The CSS Working Group invites implementations of a Candidate Recommendation Snapshot of CSS Custom Properties for Cascading Variables Module Level 1. This module introduces cascading variables as a new primitive value type that is accepted by all CSS properties, and custom properties for defining them.

CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.