Initialize the Realtime Database JavaScript SDK

Khalid Khan

The code initializes an app instance with the firebaseConfig object, which contains the following properties:

apiKey - The API key for your app authDomain - The domain for your app's authentication databaseURL - The URL for your app's database projectId - The Project ID for your app storageBucket - The Storage Bucket for your app messagingSenderId - The ID of the messaging sender for your app appId - The ID of the app your app is running on measurementId - If provided, the code uses this as the name of a Google Analytics measurement.

Shortcut: firebase.web.db.init

import { initializeApp } from 'firebase/app';
import { getDatabase } from "firebase/database";

// TODO: Replace with your app's Firebase project configuration
const firebaseConfig = {
  apiKey: "API_KEY",
  authDomain: "PROJECT_ID",
  // The value of `databaseURL` depends on the location of the database
  databaseURL: "Database URL",
  projectId: "PROJECT_ID",
  storageBucket: "PROJECT_ID.appspot.com",
  messagingSenderId: "SENDER_ID",
  appId: "APP_ID",
  // For Firebase JavaScript SDK v7.20.0 and later, `measurementId` is an optional field
  measurementId: "G-MEASUREMENT_ID",
};

const app = initializeApp(firebaseConfig);

// Get a reference to the database service
const database = getDatabase(app);