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 of the CSS Object Model (CSSOM) 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 |