CSSStyleSheet: ownerRule 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 read-only CSSStyleSheet property ownerRule returns the CSSImportRule corresponding to the @import at-rule which imported the stylesheet into the document. If the stylesheet wasn't imported into the document using @import, the returned value is null.

Value

A CSSImportRule corresponding to the @import rule which imported the stylesheet into the document. If the stylesheet wasn't imported into the document using @import, the returned value is null.

Examples

This snippet of code looks for rules which were not imported into the document using an @import at-rule.

js
const ruleList = document.styleSheets[0].cssRules;

for (const rule of ruleList) {
  if (!rule.ownerRule) {
    /* rule is not imported */
  }
}

This snippet obtains a reference to the stylesheet associated with the @import and processes it in some manner:

js
const ruleList = document.styleSheets[0].cssRules;

for (const rule of ruleList) {
  if (rule.ownerRule) {
    checkStylesheet(rule.ownerRule.styleSheet);
  }
}

Specifications

Specification
CSS Object Model (CSSOM)
# dom-cssstylesheet-ownerrule

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
ownerRule

Legend

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Full support
Full support

See also