The unregister()
method of the ServiceWorkerRegistration
interface unregisters the service worker registration and returns a Promise
. The promise will resolve to false
if no registration was found, otherwise it resolves to true
irrespective of whether unregistration happened or not (it may not unregister if someone else just called ServiceWorkerContainer.register()
with the same scope.) The service worker will finish any ongoing operations before it is unregistered.
Note: This feature is available in Web Workers.
Syntax
serviceWorkerRegistration.unregister().then(function(boolean) { });
Parameters
None.
Return value
Promise
resolves with a boolean indicating whether the service worker has unregistered or not.
Example
The following simple example registers a service worker example, but then immediately unregisters it again:
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('/sw-test/sw.js', {scope: 'sw-test'}).then(function(registration) {
// registration worked
console.log('Registration succeeded.');
registration.unregister().then(function(boolean) {
// if boolean = true, unregister is successful
});
}).catch(function(error) {
// registration failed
console.log('Registration failed with ' + error);
});
};
Specifications
Specification | Status | Comment |
Service WorkersThe definition of 'ServiceWorkerRegistration.unregister()' in that specification. | Working Draft | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 40 |
Edge Full support 17 Full support 17 Full support 16 Disabled' From version 16: this feature is behind the |
Firefox Full support 44 Full support 44 Notes' Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API. |
IE
No support No |
Opera
Full support 27 |
Safari
Full support 11.1 |
WebView Android
Full support 40 |
Chrome Android
Full support 40 |
Firefox Android
Full support 44 |
Opera Android
Full support 27 |
Safari iOS
Full support 11.3 |
Samsung Internet Android
Full support 4.0 |
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.
- See implementation notes.'
- See implementation notes.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
- Using Service Workers
- Service workers basic code example
- Is ServiceWorker ready?
Promise
- Using web workers
ServiceWorkerRegistration.unregister() by Mozilla Contributors is licensed under CC-BY-SA 2.5.