CSSRule: parentRule property

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 (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