1. Web
  2. Web APIs
  3. Location
  4. ancestorOrigins

Location: ancestorOrigins property

Baseline 2026
Newly available

Since February 2026, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The ancestorOrigins read-only property of the Location interface is a static DOMStringList containing, in reverse order, the origins of all ancestor browsing contexts of the document associated with the given Location object.

You can use location.ancestorOrigins in the script for a document to determine, for example, whenever the document is being framed by a site which you don't expect it to be framed by. You can also use it to vary the behavior of the document based on what site or list of sites is framing it.

Value

A DOMStringList.

Specifications

Specification
HTML
# dom-location-ancestororigins-dev

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
ancestorOrigins
Chrome – Full support
Chrome 20 (Release date: 2012-06-26)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 148 (Release date: 2026-02-24)
footnote Full support
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – Full support
Safari 6 (Release date: 2012-07-25)
footnote Full support
Chrome Android – Full support
Chrome Android 25 (Release date: 2013-02-27)
footnote Full support
Firefox for Android – Full support
Firefox for Android 148 (Release date: 2026-02-24)
footnote Full support
Opera Android – Full support
Opera Android 14 (Release date: 2013-05-21)
footnote Full support
Safari on iOS – Full support
Safari on iOS 6 (Release date: 2012-09-10)
footnote Full support
Samsung Internet – Full support
Samsung Internet 1.5 (Release date: 2013-09-25)
footnote Full support
WebView Android – Full support
WebView Android 4.4 (Release date: 2013-12-09)
footnote Full support
WebView on iOS – Full support
WebView on iOS 6 (Release date: 2012-09-10)
footnote Full support
Deno – No support
Deno 1.7 (Release date: 2021-01-19)
footnote , disabled
disabled From version 1.7 users must explicitly set the --location [url] runtime flag.
footnote This value is always empty in Deno.

Tip: you can click/tap on a cell for more information.

Full support
No support
See implementation notes.
User must explicitly enable this feature.

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