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CSSKeyframesRule: deleteRule() method

The deleteRule() method of the CSSKeyframeRule interface deletes the CSSKeyFrameRule that matches the specified keyframe selector.

Syntax

js

deleteRule(select)

Parameters

select

A string which contains the keyframe selector of the rule to be deleted, 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

None (undefined).

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. Returning the cssRules property would return a CSSRuleList containing two rules.

After deleting a rule with deleteRule() the cssRules property returns a CSSRuleList containing one rule.

css

@keyframes slidein {
  from {
    transform: translateX(0%);
  }

  to {
    transform: translateX(100%);
  }
}

js

let myRules = document.styleSheets[0].cssRules;
let keyframes = myRules[0]; // a CSSKeyframesRule
keyframes.deleteRule("to");
console.log(keyframes.cssRules); // a CSSRuleList object with one rule

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
deleteRule 1 12 5 10 12 4 4.4 18 5 12 3.2 1.0

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https://developer.mozilla.org/en-US/docs/Web/API/CSSKeyframesRule/deleteRule