The CSSConditionRule interface inherits from CSSGroupingRule. CSSMediaRule and CSSSupportsRule both inherit from CSSConditionRule. Before the introduction of CSSConditionRule in Blink, CSSMediaRule inherited from CSSGroupingRule, while CSSSupportsRule inherited from CSSRule and duplicated the members of CSSGroupingRule.


Editor's draft

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 56
  • Chrome for Android release 56
  • Android WebView release 56

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped/Shipping
  • Shipped/Shipping
  • No signal
  • No signals


Last updated on 2020-11-19