ServiceWorkerRegistration

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.

ServiceWorkerRegistration.active 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) 非标准 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) 非标准 只读

Returns a reference to the SyncManager (en-US) interface, which manages background synchronization processes.

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.

ServiceWorkerRegistration.update()

Checks the server for an updated version of the service worker without consulting caches.

ServiceWorkerRegistration.unregister()

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';
}

• Using Service Workers (en-US)
• Service workers basic code example
• Is ServiceWorker ready?
• Promise
• Using web workers