Google Firebase Notification

You'll need to import the javascript file in your website before starting from this link.

1) To Retrive FCM Token

Plain JS

const { Messaging: FirebaseMessaging } = window.WTN.Firebase

FirebaseMessaging.getFCMToken({
    callback:function(data){
        //data.token contains fcm token
        //store it in your backend to send notification
    }
})

ES 6+

2) To Subscribe to particular topic

Plain JS

const { Messaging: FirebaseMessaging } = window.WTN.Firebase

FirebaseMessaging.subscribe({
    toTopic: "Your Topic Name"
})

ES 6+

3) To Unsubscribe from particular topic

Plain JS

const { Messaging: FirebaseMessaging } = window.WTN.Firebase

FirebaseMessaging.unsubscribe({
    fromTopic: "Your Topic Name"
})

ES 6+

In order to specify the desired URL that will be accessed upon clicking the notification, it is necessary to pass the corresponding URL through the "deepLink" key.