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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4216441 No29 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No42 ?4829 No4.0

1. Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).

Document Tags and Contributors

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