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This feature is obsolete.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 compatibility
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 42 411 | Yes | 39 342 | No | 29 283 | No |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | No | No | Yes | 39 342 | No | No | No |
1. From version 41: this feature is behind the Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.
2. From version 34: this feature is behind the dom.fetch.enabled preference. To change preferences in Firefox, visit about:config.
3. From version 28: this feature is behind the Experimental Web Platform Features preference.