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PushSubscription: getKey() method - Web APIs | MDN
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PushSubscription: getKey() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2023.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Web Workers.
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
js
getKey(name)
Parameters
name-
A string 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.
Return value
An ArrayBuffer or null if no public key can be found.
Examples
js
reg.pushManager.getSubscription().then((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
const endpoint = subscription.endpoint;
const key = subscription.getKey("p256dh");
const auth = subscription.getKey("auth");
// …
});
Specifications
| Specification |
|---|
| Push API # dom-pushsubscription-getkey |
Browser compatibility
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