Window: external property

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The external property of the Window API returns an instance of the External interface, which was intended to contain functions related to adding external search providers to the browser. However, this is now deprecated, and the contained methods are now dummy functions that do nothing as per spec.

Instance methods

The External object has the following methods:

Method Description
AddSearchProvider(descriptionURL) Dummy function; does nothing. Used to register search descriptions.
IsSearchProviderInstalled() Dummy function; does nothing.

Specifications

Specification
HTML
# external

Browser compatibility

desktop mobile server
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
external
Deprecated
Chrome – Full support
Chrome 1 (Release date: 2008-12-11)
footnote Full support
Edge – Full support
Edge 12 (Release date: 2015-07-29)
footnote Full support
Firefox – No support
Firefox 1 – 101 (Release date: 2004-11-09)
altname
footnote Removed in 102 and later
altname Alternate name: sidebar
Firefox – Full support
Firefox 2 (Release date: 2006-10-24)
footnote
footnote From Firefox 78 AddSearchProvider() does nothing, as the specification requires.
Opera – Full support
Opera 15 (Release date: 2013-07-02)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – Full support
Chrome Android 18 (Release date: 2012-06-27)
footnote Full support
Firefox for Android – No support
Firefox for Android 4 – 101 (Release date: 2011-03-29)
altname
footnote Removed in 102 and later
altname Alternate name: sidebar
Firefox for Android – Full support
Firefox for Android 4 (Release date: 2011-03-29)
footnote
footnote From Firefox for Android 79 AddSearchProvider() does nothing, as the specification requires.
Opera Android – Full support
Opera Android 14 (Release date: 2013-05-21)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support
Samsung Internet – Full support
Samsung Internet 1 (Release date: 2013-04-27)
footnote Full support
WebView Android – Full support
WebView Android 4.4.3 (Release date: 2014-06-02)
footnote Full support
WebView on iOS – No support
WebView on iOS
footnote No support
Deno – No support
Deno
footnote No support

Legend

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

Full support
Full support
No support
No support
Deprecated. Not for use in new websites.
See implementation notes.
Uses a non-standard name
Has more compatibility info.