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

The getKey() method of the PushSubscription interface returns an ArrayBuffer representing a client public key, which can then be sent to a server and used in encrypting push message data.


var key = subscription.getKey(name);


A DOMString representing the encryption method used to generate a client key.  The value can be:


An ArrayBuffer.


  .then(function(subscription) {  
  // Enable any UI which subscribes / unsubscribes from  
  // push messages.  
  subBtn.disabled = false;

  if (!subscription) {  
    console.log('Not yet subscribed to Push')
    // We aren't subscribed to push, so set UI  
    // to allow the user to enable push  

  // Set your UI to show they have subscribed for  
  // push messages  
  subBtn.textContent = 'Unsubscribe from Push Messaging';  
  isPushEnabled = true;  
  // initialize status, which includes setting UI elements for subscribed status
  // and updating Subscribers list via push
  var endpoint = subscription.endpoint;
  var key = subscription.getKey('p256dh');
  var auth = subscription.getKey('auth');



Specification Status Comment
Push API Working Draft This is the Push API spec, but note that getKey() is not currently specified in here. It is currently Firefox-only experimental.

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 No support (Yes) 44.0 (44.0)[1] No support 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 No support

Document Tags and Contributors

 Contributors to this page: libbymc, g0ne, chrisdavidmills, jpmedley, m_t
 Last updated by: libbymc,