CSSSupportsRule

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

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

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

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
CSSSupportsRule

Legend

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Full support
Full support
Has more compatibility info.

See also