Lovable and Firebase Cloud Messaging integration: Step-by-Step Guide 2025

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How to integrate Lovable with Firebase Cloud Messaging?

Including the Firebase SDK in Your Lovable Project

Open your main HTML file (for example, index.html) in the Lovable project.
Add the following script tags within the <head> section to load Firebase libraries from the CDN. This replaces the usual terminal installation since Lovable does not have a terminal.


<!-- Firebase App (the core Firebase SDK) -->
<script src="https://www.gstatic.com/firebasejs/9.23.0/firebase-app-compat.js"></script>
<!-- Firebase Cloud Messaging -->
<script src="https://www.gstatic.com/firebasejs/9.23.0/firebase-messaging-compat.js"></script>

Setting Up Your Firebase Configuration

Create a new TypeScript file named firebaseConfig.ts in your project’s source directory.
This file will contain your Firebase project configuration. Replace the placeholder values with your Firebase project credentials.


// firebaseConfig.ts
export const firebaseConfig = {
  apiKey: "YOURAPIKEY",
  authDomain: "YOURPROJECTID.firebaseapp.com",
  projectId: "YOURPROJECTID",
  storageBucket: "YOURPROJECTID.appspot.com",
  messagingSenderId: "YOURMESSAGINGSENDER_ID",
  appId: "YOURAPPID",
};

Initializing Firebase and Firebase Cloud Messaging

Create a new TypeScript file named firebaseMessaging.ts in your source directory.
This file will initialize Firebase with your configuration and set up Firebase Cloud Messaging.


import firebase from "firebase/compat/app";
import "firebase/compat/messaging";
import { firebaseConfig } from "./firebaseConfig";

// Initialize Firebase app
const app = firebase.initializeApp(firebaseConfig);
// Initialize Firebase Cloud Messaging
const messaging = firebase.messaging();
// Optional: Handle background messages in the main code if needed
messaging.onMessage((payload) => {
  console.log("Message received. ", payload);
});
export { messaging };

Creating a Firebase Messaging Service Worker

Create a new file named firebase-messaging-sw.js in the root directory of your project.
This service worker file is required to handle background notifications.


// firebase-messaging-sw.js

// Import Firebase scripts. Note: The Firebase CDN script paths match those in your index.html.
importScripts("https://www.gstatic.com/firebasejs/9.23.0/firebase-app-compat.js");
importScripts("https://www.gstatic.com/firebasejs/9.23.0/firebase-messaging-compat.js");
// Your Firebase configuration (it must match the one in firebaseConfig.ts)
const firebaseConfig = {
  apiKey: "YOURAPIKEY",
  authDomain: "YOURPROJECTID.firebaseapp.com",
  projectId: "YOURPROJECTID",
  storageBucket: "YOURPROJECTID.appspot.com",
  messagingSenderId: "YOURMESSAGINGSENDER_ID",
  appId: "YOURAPPID",
};
// Initialize the Firebase app in the service worker
firebase.initializeApp(firebaseConfig);
// Retrieve an instance of Firebase Messaging so that it can handle background messages.
const messaging = firebase.messaging();
messaging.onBackgroundMessage(function(payload) {
  console.log("Received background message ", payload);
  // Customize notification here as needed.
  const notificationTitle = payload.notification.title;
  const notificationOptions = {
    body: payload.notification.body,
    icon: "/firebase-logo.png",
  };
  self.registration.showNotification(notificationTitle, notificationOptions);
});

Registering the Firebase Messaging Service Worker

In your main TypeScript/JavaScript file (or the entry file of your Lovable project), register the service worker.
Add the following code to the file where your application is initialized. This ensures that the service worker is registered when your app loads.


// In your main file (e.g., main.ts or app.ts)

// Check if service workers are supported and then register the one for Firebase Messaging
if ("serviceWorker" in navigator) {
  navigator.serviceWorker.register("./firebase-messaging-sw.js")
    .then((registration) => {
      console.log("Service Worker registration successful with scope: ", registration.scope);
    })
    .catch((err) => {
      console.error("Service Worker registration failed: ", err);
    });
}

Requesting Notification Permission and Obtaining an FCM Token

Within your application (for example, in a component where you want to trigger notifications), request the user's permission to send notifications and obtain the FCM token.
Add the following snippet to a component or a dedicated file handling notifications. This code uses the messaging instance from your firebaseMessaging.ts file.


import { messaging } from "./firebaseMessaging";

// Request permission to send notifications
function requestNotificationPermission() {
  console.log("Requesting notification permission...");
  Notification.requestPermission().then((permission) => {
    if (permission === "granted") {
      console.log("Notification permission granted.");
      // Get FCM token
      messaging.getToken({ vapidKey: "YOURPUBLICVAPID_KEY" })
        .then((currentToken) => {
          if (currentToken) {
            console.log("FCM Token:", currentToken);
            // TODO: Send the token to your server for further use if required.
          } else {
            console.warn("No registration token available. Request permission to generate one.");
          }
        })
        .catch((err) => {
          console.error("An error occurred while retrieving token. ", err);
        });
    } else {
      console.warn("Unable to get permission to notify.");
    }
  });
}
// Call the function when your app is ready to request permission
requestNotificationPermission();

Using the FCM Token in Your Application

After obtaining the token, you can use it according to your needs, such as sending it to your backend server for push notifications.
This completes the integration of Firebase Cloud Messaging in your Lovable project.

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