CSSSupportsRule

The CSSSupportsRule interface represents a single CSS @supports at-rule.

Properties

Inherits properties from its ancestors CSSConditionRule, CSSGroupingRule, and CSSRule.

Methods

Inherits methods from its ancestors CSSConditionRule, CSSGroupingRule, and CSSRule.

Examples

The CSS includes a CSS feature query using the @supports at-rule, containing one style rule. This will be the first CSSRule returned by document.styleSheets[0].cssRules. myRules[0] therefore returns a CSSSupportsRule object.

@supports (display: grid) {
  body {
    color: blue;
  }
}

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); // a CSSSupportsRule representing the feature query.

Specifications

Specification
CSS Conditional Rules Module Level 3 (CSS Conditional 3) # the-csssupportsrule-interface

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`CSSSupportsRule`	28	12	22	No	12.1	9	≤37	28	22	15 12.1-14	9	1.5