PushManager.getSubscription()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The PushManager.getSubscription() method of the PushManager interface retrieves an existing push subscription.

It returns a Promise that resolves to a PushSubscription object containing details of an existing subscription. If no existing subscription exists, this resolves to a null value.

Syntax

​PushManager.getSubscription().then(function(pushSubscription) { ... } );

Parameters

None.

Returns

A Promise that resolves to a PushSubscription object or null.

Example

This code snippet is taken from a push messaging and notification sample. (No live demo is available.)

// We need the service worker registration to check for a subscription
  navigator.serviceWorker.ready.then(function(serviceWorkerRegistration) {
    // Do we already have a push message subscription?
    serviceWorkerRegistration.pushManager.getSubscription()
      .then(function(subscription) {
        // Enable any UI which subscribes / unsubscribes from
        // push messages.
        var 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(function(err) {
        window.Demo.debug.log('Error during getSubscription()', err);
      });
  });

Specifications

Specification Status Comment
Push API
The definition of 'getSubscription()' in that specification.
Working Draft Initial definition.

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!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 42.0 (Yes) 44.0 (44.0)[1] No support ? No support
Feature Android Android Webview Edge Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support No support (Yes) 48.0 (48)[2] No support No support No support No support 42.0

Document Tags and Contributors

 Contributors to this page: arjunyel, kalpeshmange, libbymc, chrisdavidmills, jpmedley, kscarfone
 Last updated by: arjunyel,