Location: ancestorOrigins

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.


const ancestors = location.ancestorOrigins;


Specification Status Comment
HTML Living Standard
The definition of 'ancestorOrigins ' in that specification.
Living Standard

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
ancestorOriginsChrome Full support 20Edge Full support 79Firefox No support NoIE No support NoOpera Full support 15Safari Full support 6WebView Android Full support 4.4Chrome Android Full support 25Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 6Samsung Internet Android Full support 1.5


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