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getToken() function

Subscribes the FirebaseMessaging instance to push notifications. Returns an Firebase Cloud Messaging registration token that can be used to send push messages to that FirebaseMessaging instance.

If a notification permission isn't already granted, this method asks the user for permission. The returned promise rejects if the user does not allow the app to show notifications.

Signature:

export declare function getToken(messaging: FirebaseMessaging, options?: {
    vapidKey?: string;
    swReg?: ServiceWorkerRegistration;
}): Promise<string>;

Parameters

Parameter	Type	Description
messaging	FirebaseMessaging	The FirebaseMessaging instance.
options

Returns:

Promise<string>

The promise resolves with an FCM registration token.