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.
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
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Legend
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- Full support
- Full support
- Has more compatibility info.