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 ⁨August 2016⁩.

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

Syntax

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.

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%);   } }

let myRules = document.styleSheets[0].cssRules; let keyframes = myRules[0]; // a CSSKeyframesRule console.log(keyframes.findRule("to")); // a CSSKeyframeRule object