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Это экспериментальная технология
Так как спецификация этой технологии ещё не стабилизировалась, смотрите таблицу совместимости по поводу использования в различных браузерах. Также заметьте, что синтаксис и поведение экспериментальной технологии может измениться в будущих версиях браузеров, вслед за изменениями спецификации.

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.

Properties

Also implements properties from its parent interface, EventTarget.

ServiceWorkerRegistration.scope Только для чтения
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 Только для чтения
Returns a service worker whose state is installing. This is initially set to null.
ServiceWorkerRegistration.waiting Только для чтения
Returns a service worker whose state is waiting. This is initially set to null.
ServiceWorkerRegistration.active Только для чтения
Returns a service worker whose state is either activating or activated. This is initially set to null. An active worker will control a ServiceWorkerClient if the client's URL falls within the scope of the registration (the scope option set when ServiceWorkerContainer.register is first called.)
ServiceWorkerRegistration.navigationPreload Только для чтения
Returns the instance of NavigationPreloadManager associated with the current service worker registration.
serviceWorkerRegistration.periodicSync Только для чтения
Returns a reference to the PeriodicSyncManager interface, which manages periodic background synchronization processes.
ServiceWorkerRegistration.pushManager Только для чтения
Returns a reference to the PushManager interface for managing push subscriptions including subscribing, getting an active subscription, and accessing push permission status.
ServiceWorkerRegistration.sync  Только для чтения  
Returns a reference to the SyncManager interface, which manages background synchronization processes.

Event handlers

ServiceWorkerRegistration.onupdatefound Только для чтения
An EventListener property called whenever an event of type updatefound is fired; it is fired any time the ServiceWorkerRegistration.installing property acquires a new service worker.

Methods

Also implements methods from its parent interface, EventTarget.

ServiceWorkerRegistration.getNotifications()
Returns a Promise that resolves to an array of Notification objects.
ServiceWorkerRegistration.showNotification()
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. The service worker will finish any ongoing operations before it is unregistered.

Examples

In this example, the code first checks whether the browser supports service workers and if so registers one. Next, it adds and updatefound event in which it uses the service worker registration to listen for further changes to the service worker's state. If the service worker hasn't changed since the last time it was registered, than the updatefound event will not be fired.

if ('serviceWorker' in navigator) {
  navigator.serviceWorker.register('/sw.js')
  .then(function(registration) {
    registration.addEventListener('updatefound', function() {
      // If updatefound is fired, it means that there's
      // a new service worker being installed.
      var installingWorker = registration.installing;
      console.log('A new service worker is being installed:',
        installingWorker);

      // You can listen for changes to the installing service worker's
      // state via installingWorker.onstatechange
    });
  })
  .catch(function(error) {
    console.log('Service worker registration failed:', error);
  });
} else {
  console.log('Service workers are not supported.');
}

Specifications

Specification Status Comment
Service Workers
Определение 'ServiceWorkerRegistration' в этой спецификации.
Рабочий черновик Initial definition.
Push API
Определение 'PushManager' в этой спецификации.
Рабочий черновик Adds the pushManager property.
Notifications API Живой стандарт Adds the showNotification() method and the getNotifications() method.
Web Background Synchronization Живой стандарт Adds the sync property.

Browser compatibility

ВозможностьChromeEdgeFirefoxInternet ExplorerOperaSafari
Базовая поддержка40

161

17

442 Нет27 Нет
scope40

161

17

442 Нет27 Нет
installing40

161

17

442 Нет27 Нет
waiting40

161

17

442 Нет27 Нет
active40

161

17

442 Нет27 Нет
navigationPreload59

161

17

442 Нет46 Нет
periodicSync40

161

17

442 Нет27 Нет
pushManager40

161

17

442 Нет27 Нет
sync49

161

17

442 Нет36 Нет
onupdatefound40

161

17

442 Нет27 Нет
getNotifications40

161

17

462 Нет27 Нет
showNotification40

161

17

462 Нет27 Нет
update453 4

161

17

442 Нет325 6 Нет
unregister40

161

17

442 Нет27 Нет
updateViaCache ? ? ? ? ? ?
ВозможностьAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Базовая поддержка4040 ?4427 Нет4.0
scope4040 ?4427 Нет4.0
installing4040 ?4427 Нет4.0
waiting4040 ?4427 Нет4.0
active4040 ?4427 Нет4.0
navigationPreload5959 ?4446 Нет4.0
periodicSync4040 ?4427 Нет4.0
pushManager4040 ?4427 Нет4.0
sync4949 ?4436 Нет4.0
onupdatefound4040 ?4427 Нет4.0
getNotifications4040 ?4627 Нет4.0
showNotification4040 ?4627 Нет4.0
update453 4453 4 ?44325 6 Нет4.0
unregister4040 ?4427 Нет4.0
updateViaCache ? ? ? ? ? ? ?

1. From version 16: this feature is behind the Enable service workers preference.

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

3. Starting with Chrome 46, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.

4. Before Chrome 48, this method always bypassed the browser cache. Starting with Chrome 48, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.

5. Starting with Opera 33, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.

6. Before Opera 35, this method always bypassed the browser cache. Starting with Opera 35, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.

See also

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