The userVisibleOnly read-only property of the PushSubscriptionOptions interface indicates if the returned push subscription will only be used for messages whose effect is made visible to the user.

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

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

navigator.serviceWorker.ready.then((reg) => {
  reg.pushManager.getSubscription().then((subscription) => {
    const options = subscription.options;
    console.log(options.userVisibleOnly); // true if this is a user visible subscription
  });
});