ServiceWorkerRegistration
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Примечание: Эта возможность доступна в Web Workers.
Интерфейс ServiceWorkerRegistration
ссылается на регистрацию Service Worker. Вы можете зарегистрировать Service Worker, чтобы контролировать одну или несколько страниц на одном домене.
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.
Свойства
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 tonull
. ServiceWorkerRegistration.waiting
Только для чтения-
Returns a service worker whose state is
waiting
. This is initially set tonull
. ServiceWorkerRegistration.active
Только для чтения-
Returns a service worker whose state is either
activating
oractivated
. This is initially set tonull
. An active worker will control aServiceWorkerClient
if the client's URL falls within the scope of the registration (thescope
option set whenServiceWorkerContainer.register
is first called.) -
Returns the instance of
NavigationPreloadManager
associated with the current service worker registration. serviceWorkerRegistration.periodicSync
Non-standard 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
Non-standard 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 typeupdatefound
is fired; it is fired any time theServiceWorkerRegistration.installing
property acquires a new service worker.
Методы
Also implements methods from its parent interface, EventTarget
.
ServiceWorkerRegistration.getNotifications()
-
Returns a
Promise
that resolves to an array ofNotification
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.
Примеры
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.");
}
Спецификации
Specification |
---|
Service Workers # serviceworkerregistration-interface |
Push API # extensions-to-the-serviceworkerregistration-interface |
Совместимость с браузерами
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