Web/API/PushSubscription/getKey

This is an experimental technologyCheck 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.

Syntax

var key = subscription.getKey(name);

Parameters

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

p256dh

An Elliptic curve Diffie–Hellman public key on the P-256 curve (that is, the NIST secp256r1 elliptic curve). The resulting key is an uncompressed point in ANSI X9.62 format.
auth: An authentication secret, as described in Message Encryption for Web Push.

Returns

An ArrayBuffer.

Example

reg.pushManager.getSubscription()  
  .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  
    return;  
  }

  // 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');

    ...

Specifications

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

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getKey()`	Chrome Full support 42	Edge Full support 16	Firefox Full support 44 Notes' Full support 44 Notes' Notes' Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	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
See implementation notes.': See implementation notes.

PushSubscription.getKey() by Mozilla Contributors is licensed under CC-BY-SA 2.5.