Experimental: 这是一个实验中的功能

The ServiceWorkerRegistration interface of the ServiceWorker API represents the service worker registration. You register a service worker to control one or more pages that share the same origin.

The lifetime of a service worker registration is beyond that of the ServiceWorkerRegistration objects that represent them within the lifetime of their corresponding service worker clients. The browser maintains a persistent list of active ServiceWorkerRegistration objects.

Note: This feature is available in Web Workers.


Also implements properties from its parent interface, EventTarget.

ServiceWorkerRegistration.scope (en-US) 只读
Returns a unique identifier for a service worker registration. This must be on the same origin as the document that registers the ServiceWorker.
ServiceWorkerRegistration.installing (en-US) 只读
Returns a service worker whose state is installing. This is initially set to null.
ServiceWorkerRegistration.waiting (en-US) 只读
Returns a service worker whose state is installed. This is initially set to null. 只读
Returns a service worker whose state is either activating or activated. This is initially set to null. An active worker will control a ServiceWorkerClient (en-US) if the client's URL falls within the scope of the registration (the scope option set when ServiceWorkerContainer.register is first called.)
serviceWorkerRegistration.periodicSync (en-US) 只读
Returns a reference to the PeriodicSyncManager (en-US) interface, which manages periodic background synchronization processes.
ServiceWorkerRegistration.pushManager 只读
Returns a reference to the PushManager interface for managing push subscriptions including subscribing, getting an active subscription, and accessing push permission status.
ServiceWorkerRegistration.sync (en-US)  只读  
Returns a reference to the SyncManager (en-US) interface, which manages background synchronization processes.

Event handlers

ServiceWorkerRegistration.onupdatefound (en-US) 只读
An EventListener property called whenever an event of type updatefound is fired; it is fired any time the ServiceWorkerRegistration.installing (en-US) property acquires a new service worker.


Also implements methods from its parent interface, EventTarget.

ServiceWorkerRegistration.getNotifications() (en-US)
Returns a Promise that resolves to an array of Notification objects.
ServiceWorkerRegistration.showNotification() (en-US)
Displays the notification with the requested title.
Checks the server for an updated version of the service worker without consulting caches.
Unregisters the service worker registration and returns a promise (see Promise). The service worker will finish any ongoing operations before it is unregistered.


This code snippet is from the service worker registration-events sample (live demo). The code checks to see if the browser supports service workers and if there's currently a service worker handling requests on this page for the current navigation.

Any new service workers are registered; if there's an existing service worker, the code overrides its default scope so that the registration applies to the current directory and everything underneath it. The example also reports any registration failures.

if ('serviceWorker' in navigator) {
  document.querySelector('#availability').innerText = 'are';
  document.querySelector('#controlled').innerText = navigator.serviceWorker.controller ? 'is' : 'is not';
  navigator.serviceWorker.register('service-worker.js', {scope: './'}).then(function(registration) {
    document.querySelector('#register').textContent = 'succeeded';
  }).catch(function(error) {
    document.querySelector('#register').textContent = 'failed: ' + error;
} else {
  document.querySelector('#availability').innerText = 'are not';


Specification Status Comment
Service Workers
Working Draft Initial definition.
Push API
Working Draft Adds the pushManager property.
Notifications API Living Standard Adds the showNotification() (en-US) method and the getNotifications() (en-US) method.
Web Background Synchronization Living Standard Adds the sync (en-US) property.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 40.0 44.0 (44.0)[1] 未实现 ? 未实现
Available in web workers (Yes) 44.0 (44.0)[1] 未实现 ? 未实现
getNotifications(), showNotification() (Yes) 46.0 (46.0)[1] 未实现 ? 未实现
sync property 49.0        
Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support 未实现 未实现 44.0 (44.0) (Yes) 未实现 ? 未实现 40.0
Available in web workers 未实现 未实现 44.0 (44.0) (Yes) 未实现 ? 未实现 (Yes)
getNotifications(), showNotification() 未实现 未实现 46.0 (46.0) (Yes) 未实现 ? 未实现 (Yes)
sync property 未实现 未实现           49.0

[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)

See also