Firebase sw.js not respnding after closing browser - firebase

Question

I have created firebase project for using Cloud Messaging . until now I have sent a message from backend to client successfully when the browser (chrome) is open but when I close the browser notification not sending until reopening of the browser in below code you can see my firebase-messaging-sw.js
importScripts('https://www.gstatic.com/firebasejs/5.0.4/firebase-app.js');
importScripts('https://www.gstatic.com/firebasejs/5.0.4/firebase-messaging.js');
firebase.initializeApp({
messagingSenderId: "My-Sender-Id"
});
const messaging = firebase.messaging();
messaging.setBackgroundMessageHandler(function(payload) {
console.log('[firebase-messaging-sw.js] Received background message ', payload);
// Customize notification here
var notificationTitle = 'Background Message Title';
var notificationOptions = {
body: 'Background Message body.',
icon: '/firebase-logo.png'
};
return self.registration.showNotification(notificationTitle,
notificationOptions);
});
self.addEventListener('push', function(e) {
var data;
if (e.data) {
data = JSON.parse(e.data.text()).data;
} else {
data = {};
}
var title = data.title;
var options = {
body: data.body,
icon: 'assets/custom/img/logo.png',
vibrate: [100, 50, 100],
requireInteraction: true,
data: data.data ? data.data : null,
dir: "rtl",
actions: [{
action: data.action,
title: 'open',
icon: 'images/checkmark.png'
},
{
action: 'close',
title: 'close',
icon: 'images/xmark.png'
},
]
};
e.waitUntil(
self.registration.showNotification(title, options)
);
});
self.addEventListener('notificationclick', function(event) {
console.log('On notification click: ', event.notification.tag);
event.notification.close();
if (event.action != "" && event.action != "close") {
return clients.openWindow(event.action);
}
});
how can I have notification even browser is closed?

Answer 1

I believe you are using service worker for FCM, and the service worker only works when the browser is open ,as service worker is responsible for handling the push notification, when the browser is closed you won't receive any push notification, Actually the push notification will appear only when the browser is opened ,or the application for which you have configured FCM is open on chrome tabs but not focused, there is one work around or you say solution for it , that is make sure the chrome browser is active in the background even after closing chrome browser.
There is option in chrome settings
Goto Settings -> Advanced -> Continue running background apps when Google Chrome is closed make sure you enable it
i have tested the code of FCM , after enabling the option you will get the notification popup.

Answer 2

What you are trying to achieve should be accomplished using a database like firestore. When a notification is received at the time when browser is closed, in the service worker, you should add the code to save the notification message in the firestore so that when user opens the website again, you can retrieve the messages from the firestore and can display them to user. As soon as the browser is opened, any pending notification would be saved to the database by service worker.
I believe this should be the preferred way to achieve this.