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
โPushManager.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 arenโt 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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getSubscription | Chrome Full support 42 | Edge
Full support
16
| Firefox
Full support
44
| IE No support No | Opera Full support 29 | Safari No support No | WebView Android No support No | Chrome Android Full support 42 | Firefox Android
Full support
48
| Opera Android Full support 29 | Safari iOS No support No | Samsung Internet Android Full support 4.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.