Web/API/Response/useFinalURL

ObsoleteThis feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

The useFinalURL property of the Response interface contains a boolean stating whether this is the final URL of the response.

This property applies only to ServiceWorkers. In other contexts it will return undefined.

Syntax

var isfinalURL = Response.useFinalURL;

Value

A Boolean indicating whether or not the URL is final rather than a redirect.

Example

Consider a script residing in page index.html:

fetch('/test').then((r) => console.log(r.url))

test.html is being controlled by the service worker sw.js:

onfetch = (e) => {
  e.respondWith(fetch('/page2').then((r) => {
    r.usefinalURL = true;
    return r;
  })
}

The output will be /page2 and not /test in index.html, since setting the usefinalURL means that the response's URL is not set to request's URL.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`useFinalURL` Experimental'Deprecated'	Chrome Full support 42 Full support 42 Full support 41 Disabled' Disabled' From version 41: this feature is behind the `Experimental Web Platform Features` preference. To change preferences in Chrome, visit chrome://flags.	Edge Full support ≤18	Firefox Full support 39 Full support 39 Full support 34 Disabled' Disabled' From version 34: this feature is behind the `dom.fetch.enabled` preference. To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 29 Full support 29 Full support 28 Disabled' Disabled' From version 28: this feature is behind the `Experimental Web Platform Features` preference.	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 39 Full support 39 Full support 34 Disabled' Disabled' From version 34: this feature is behind the `dom.fetch.enabled` preference. To change preferences in Firefox, visit about:config.	Opera Android Full support 29 Full support 29 Full support 28 Disabled' Disabled' From version 28: this feature is behind the `Experimental Web Platform Features` preference.	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
Deprecated. Not for use in new websites.': Deprecated. Not for use in new websites.
User must explicitly enable this feature.': User must explicitly enable this feature.