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Response.useFinalURL

Obsolete
This feature is obsolete.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.

Specifications

Specification	Status	Comment
Fetch The definition of 'useFinalURL' in that specification.	Living Standard	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	42 42 41 Disabled Disabled From version 41: this feature is behind the `Experimental Web Platform Features` preference. To change preferences in Chrome, visit chrome://flags.	Yes	39 39 34 Disabled Disabled From version 34: this feature is behind the `dom.fetch.enabled` preference. To change preferences in Firefox, visit about:config.	No	29 29 28 Disabled Disabled From version 28: this feature is behind the `Experimental Web Platform Features` preference.	No