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PushSubscriptionOptions: applicationServerKey property

The applicationServerKey read-only property of the PushSubscriptionOptions interface contains the public key used by the push server.

Value

A public key your push server uses to send messages to client apps via a push server. This value is part of a signing key pair generated by your application server, and usable with elliptic curve digital signature (ECDSA), over the P-256 curve. If no applicationServerKey member is passed when initialized, it will be set to null.

Examples

In the example below the value of applicationServerKey is printed to the console.

js

navigator.serviceWorker.ready.then((reg) => {
  reg.pushManager.getSubscription().then((subscription) => {
    const options = subscription.options;
    console.log(options.applicationServerKey); // the public key
  });
});

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
applicationServerKey 54 17 44 No 41
16Supported on macOS 13 and later
No 54 48 41 16.4 6.0

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https://developer.mozilla.org/en-US/docs/Web/API/PushSubscriptionOptions/applicationServerKey