CSSKeyframesRule: deleteRule() method

{{APIRef("CSSOM") }}

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

Syntax

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 ({{jsxref("undefined")}}).

Examples

The CSS includes a keyframes at-rule. This will be the first {{domxref("CSSRule")}} returned by document.styleSheets[0].cssRules. myRules[0] returns a {{domxref("CSSKeyframesRule")}} object. Returning the cssRules property would return a {{domxref("CSSRuleList")}} containing two rules.

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

@keyframes slide-in {
  from {
    transform: translateX(0%);
  }

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

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

{{Specifications}}

Browser compatibility

{{Compat}}