CSSRule: parentRule property

{{ APIRef("CSSOM") }}

The parentRule property of the {{domxref("CSSRule")}} interface returns the containing rule of the current rule if this exists, or otherwise returns null.

Value

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

Examples

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

  body {
    color: blue;
  }
}

let myRules = document.styleSheets[0].cssRules;
let childRules = myRules[0].cssRules;
console.log(childRules[0].parentRule); // a CSSMediaRule

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}