CSSKeyframesRule: cssRules property

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 read-only cssRules property of the CSSKeyframeRule interface returns a CSSRuleList containing the rules in the keyframes at-rule.

Note: The CSSKeyframeRule itself is indexable like an array, and functions similarly to its cssRules property.

Value

Examples

The CSS includes a keyframes at-rule. This will be the first CSSRule returned by document.styleSheets[0].cssRules. myRules[0] returns a CSSKeyframesRule object. The cssRules property returns a CSSRuleList containing two rules.

css
@keyframes slide-in {
  from {
    transform: translateX(0%);
  }

  to {
    transform: translateX(100%);
  }
}
js
let myRules = document.styleSheets[0].cssRules;
let keyframes = myRules[0]; // a CSSKeyframesRule
console.log(keyframes.cssRules); // a CSSRuleList object with two rules

Specifications

Specification
CSS Animations Level 1
# dom-csskeyframesrule-cssrules

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
cssRules

Legend

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Full support
Full support