Last Call: CSS Conditional Rules Module Level 3

The Cascading Style Sheets (CSS) Working Group has published a Last Call Working Draft of CSS Conditional Rules Module Level 3. This module contains the features of CSS for conditional processing of parts of style sheets, conditioned on capabilities of the processor or the document the style sheet is being applied to. It includes and extends the functionality of CSS level 2, which builds on CSS level 1. The main extensions compared to level 2 are allowing nesting of certain at-rules inside ‘@media’, and the addition of the ‘@supports’ rule for conditional processing. Comments are welcome through 10 January. Learn more about the Style Activity.