A PushSubscriptionOptions object represents additional options associated with a push subscription.
The userVisibleOnly option, when set to true, indicates that the push subscription will only be used
for push messages whose effect is made visible to the user, for example by displaying a Web Notification.
A PushSubscriptionOptions object represents additional options associated with a push subscription.
The userVisibleOnly option, when set to true, indicates that the push subscription will only be used for push messages whose effect is made visible to the user, for example by displaying a Web Notification.