The options read-only property of the PushSubscription interface is an object containing the options used to create the subscription.

An read-only PushSubscriptionOptions object containing the following values:

userVisibleOnly

A boolean, indicating that the returned push subscription will only be used for messages whose effect is made visible to the user.

applicationServerKey

A public key your push server will use 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.