CSSKeyframesRule: length property
The read-only length
property of the CSSKeyframeRule
interface returns the number of CSSKeyframeRule
objects in its list. You can then access each keyframe rule by its index directly on the CSSKeyframeRule
object.
Value
A non-negative integer. It should have the same value as the length
of the cssRules
property.
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
const myRules = document.styleSheets[0].cssRules;
const keyframes = myRules[0]; // a CSSKeyframesRule
console.log(keyframes.length); // 2
Specifications
Specification |
---|
CSS Animations Level 1 # dom-csskeyframesrule-length |
Browser compatibility
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