Baseline Widely available *
The CSSKeyframesRule interface describes an object representing a complete set of keyframes for a CSS animation. It corresponds to the contents of a whole @keyframes at-rule.
Inherits properties from its ancestor CSSRule.
CSSKeyframesRule.name
Represents the name of the keyframes, used by the animation-name property.
CSSKeyframesRule.cssRules Read only
Returns a CSSRuleList of the keyframes in the list.
CSSKeyframesRule.length Read only
Returns the number of keyframes in the list.
Inherits methods from its ancestor CSSRule.
CSSKeyframesRule.appendRule()
Inserts a new keyframe rule into the current CSSKeyframesRule. The parameter is a string containing a keyframe in the same format as an entry of a @keyframes at-rule. If it contains more than one keyframe rule, a DOMException with a SYNTAX_ERR is thrown.
CSSKeyframesRule.deleteRule()
Deletes a keyframe rule from the current CSSKeyframesRule. The parameter is the index of the keyframe to be deleted, expressed as a string resolving as a number between 0% and 100%.
CSSKeyframesRule.findRule()
Returns a keyframe rule corresponding to the given key. The key is a string containing an index of the keyframe to be returned, resolving to a percentage between 0% and 100%. If no such keyframe exists, findRule returns null.
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.
@keyframes slide-in {
from {
transform: translateX(0%);
}
to {
transform: translateX(100%);
}
}
const myRules = document.styleSheets[0].cssRules;
const keyframes = myRules[0]; // a CSSKeyframesRule
CSSKeyframesRule can be indexed like an array, and functions similar to its cssRules property.
const keyframes = document.styleSheets[0].cssRules[0];
for (let i = 0; i < keyframes.length; i++) {
console.log(keyframes[i].keyText);
}
// Output:
// 0%
// 100%
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