files/en-us/web/api/serviceworkerregistration/unregister/index.md
{{APIRef("Service Workers API")}}{{SecureContext_Header}} {{AvailableInWorkers}}
The unregister() method of the
{{domxref("ServiceWorkerRegistration")}} interface unregisters the service worker
registration and returns a {{jsxref("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 {{domxref("ServiceWorkerContainer.register()")}}
with the same scope.) The service worker will finish any ongoing operations before it is
unregistered.
unregister()
None.
{{jsxref("Promise")}} resolves with a boolean indicating whether the service worker has unregistered or not.
The following simple example registers a service worker example, but then immediately unregisters it again:
if ("serviceWorker" in navigator) {
navigator.serviceWorker
.register("/sw.js", { scope: "/" })
.then((registration) => {
// registration worked
console.log("Registration succeeded.");
registration.unregister().then((boolean) => {
// if boolean = true, unregister is successful
});
})
.catch((error) => {
// registration failed
console.error(`Registration failed with ${error}`);
});
}
{{Specifications}}
{{Compat}}