Cloud Messaging

Any Realtime app needs to send Realtime notifications. Firebase Cloud Messaging (FCM) provides a platform that helps you send the messages and notifications to the app user in Realtime. You can send hundreds of billions of messages per day for free across different platforms: Android, iOS, and web. We can also schedule the message delivery—immediately or in future. Notification messages are integrated with Firebase Analytics, so no coding is required to monitor user engagement.

Service Workers are supported on the following browsers:

• Chrome: 50+
• Firefox: 44+
• Opera Mobile: 37+

// Retrieve Firebase Messaging object.
const messaging = firebase.messaging();
messaging.requestPermission()
.then(function() {
 console.log('Notification permission granted.');
 // Retrieve the Instance ID token for use with FCM.
 // ...
})
.catch(function(err) {
 console.log('Unable to get permission to notify.', err);
});