permissionState method
The permissionState() method of the
PushManager interface returns a Promise that resolves to a
string indicating the permission state of the push manager. Possible
values are 'prompt', 'denied', or 'granted'.
Note: As of Firefox 44, the permissions for Notifications and Push have been merged. If permission is granted for notifications, push will also be enabled.
Implementation
external JSPromise<JSString> permissionState(
[PushSubscriptionOptionsInit options]);