CSSKeyframeRule

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 CSSKeyframeRule interface describes an object representing a set of styles for a given keyframe. It corresponds to the contents of a single keyframe of a @keyframes at-rule.

Instance properties

Inherits properties from its ancestor CSSRule.

CSSKeyframeRule.keyText: Represents the key of the keyframe, like '10%', '75%'. The from keyword maps to '0%' and the to keyword maps to '100%'.
CSSKeyframeRule.style Read only: Returns a CSSStyleDeclaration of the CSS style associated with the keyframe.

Instance methods

No specific methods; inherits methods from its ancestor CSSRule.

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, which will contain individual CSSKeyFrameRule objects for each keyframe.

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[0]); // a CSSKeyframeRule representing an individual keyframe.

Specifications

Specification
CSS Animations Level 1 # interface-csskeyframerule

Browser compatibility

BCD tables only load in the browser