CSSSupportsRule

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

CSSRule CSSGroupingRule CSSConditionRule CSSSupportsRule

Instance properties

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

Instance 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.

css
@supports (display: grid) {
  body {
    color: blue;
  }
}
js
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); // a CSSSupportsRule representing the feature query.

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android
CSSSupportsRule 28 12 22 12.1 9 28 22 1512.1–14 9 1.5 4.4

See also

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https://developer.mozilla.org/en-US/docs/Web/API/CSSSupportsRule