PushManager: getSubscription() Methode

Sicherer Kontext: Diese Funktion ist nur in sicheren Kontexten (HTTPS) in einigen oder allen unterstützenden Browsern verfügbar.

Hinweis: Diese Funktion ist in Web Workers verfügbar.

getSubscription()

// We need the service worker registration to check for a subscription
navigator.serviceWorker.ready.then((serviceWorkerRegistration) => {
 // Do we already have a push message subscription?
 serviceWorkerRegistration.pushManager
 .getSubscription()
 .then((subscription) => {
 // Enable any UI which subscribes / unsubscribes from
 // push messages.
 const pushButton = document.querySelector(".js-push-button");
 pushButton.disabled = false;
 if (!subscription) {
 // We aren't subscribed to push, so set UI
 // to allow the user to enable push
 return;
 }
 // Keep your server in sync with the latest subscriptionId
 sendSubscriptionToServer(subscription);
 showCurlCommand(subscription);
 // Set your UI to show they have subscribed for
 // push messages
 pushButton.textContent = "Disable Push Messages";
 isPushEnabled = true;
 })
 .catch((err) => {
 console.error(`Error during getSubscription(): ${err}`);
 });
});

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