CSSRule: parentRule property

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 parentRule property of the CSSRule interface returns the containing rule of the current rule if this exists, or otherwise returns null.

Value

A CSSRule which is the type of the containing rules. If the current rule is inside a media query, this would return CSSMediaRule. Otherwise it returns null.

Examples

css
@media (min-width: 500px) {
  .box {
    width: 100px;
    height: 200px;
    background-color: red;
  }

  body {
    color: blue;
  }
}
js
let myRules = document.styleSheets[0].cssRules;
let childRules = myRules[0].cssRules;
console.log(childRules[0].parentRule); // a CSSMediaRule

Specifications

Specification
CSS Object Model (CSSOM)
# dom-cssrule-parentrule

Browser compatibility

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