ReadonlyendpointThe endpoint read-only property of the PushSubscription interface returns a string containing the endpoint associated with the push subscription.
ReadonlyexpirationThe expirationTime read-only property of the PushSubscription interface returns a DOMHighResTimeStamp of the subscription expiration time associated with the push subscription, if there is one, or null otherwise.
ReadonlyoptionsThe options read-only property of the PushSubscription interface is an object containing the options used to create the subscription.
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.
The toJSON() method of the PushSubscription interface is a standard serializer: it returns a JSON representation of the subscription properties, providing a useful shortcut.
The unsubscribe() method of the PushSubscription interface returns a Promise that resolves to a boolean value when the current subscription is successfully unsubscribed.
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PushSubscriptioninterface of the Push API provides a subscription's URL endpoint along with the public key and secrets that should be used for encrypting push messages to this subscription. This information must be passed to the application server, using any desired application-specific method. Available only in secure contexts.MDN Reference