CSSKeyframesRule: findRule() method

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 findRule() method of the CSSKeyframeRule interface finds the CSSKeyFrameRule that matches the specified keyframe selector.

Syntax

js
findRule(select)

Parameters

select

A string which contains the keyframe selector of the rule to be found, which must be:

  • a comma-separated list of percentage values between 0% and 100%;
  • or, the keywords from or to

Note that the number and order of the values in the specified keyframe selector must match those of the targeted keyframe rule(s). White-space is disregarded.

Return value

A CSSKeyframeRule which is the last matching rule. If no rules are found, nothing is returned.

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. Calling findRule("to") returns a CSSKeyframeRule representing the second rule.

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.findRule("to")); // a CSSKeyframeRule object

Specifications

Specification
CSS Animations Level 1
# interface-csskeyframesrule-findrule

Browser compatibility

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