React Chat Application With Code and Explanation

React Chat Application With Code and Explanation

Create a real-time chat application using technologies like Firebase for the backend. Users should be able to join different chat rooms or create private messages.

Creating a real-time chat application in React involves using a backend service, like Firebase or a WebSocket server, for handling real-time communication. Here's a simplified example using Firebase for the backend:

Step 1: Set Up a New React App

npx create-react-app ${APP_NAME}

Step 2: Set Up Firebase

  • Go to the Firebase Console and create a new project.
  • Set up Firebase Authentication and Firestore database.
  • In your Firebase project, go to Project Settings > General > Your apps and click on the Web app (</>) to get your Firebase configuration.

Step 3: Install Firebase in Your React App

npm install firebase

Step 4: Create the Chat App Component

import React, { useState, useEffect } from 'react';
import firebase from 'firebase/app';
import 'firebase/firestore';
import 'firebase/auth';

const firebaseConfig = {
  // Your Firebase configuration here


const ChatApp = () => {
  const [messages, setMessages] = useState([]);
  const [text, setText] = useState('');

  const sendMessage = async () => {
    if (text.trim() !== '') {
      await firebase.firestore().collection('messages').add({
        text: text,
        timestamp: firebase.firestore.FieldValue.serverTimestamp(),

  useEffect(() => {
    const unsubscribe = firebase.firestore().collection('messages').orderBy('timestamp').onSnapshot(snapshot => {
      const newMessages = => ({

    return () => unsubscribe();
  }, []);

  return (
      <h1>Chat App</h1>
          { => (
            <li key={}>{message.text}</li>
          onChange={(e) => setText(}
          placeholder="Type a message..."
        <button onClick={sendMessage}>Send</button>

export default ChatApp;

Step 5: Use the Chat App Component

In your main application file (e.g., App.js), import and use the ChatApp component.

import React from 'react';
import ChatApp from './ChatApp';

function App() {
  return (
    <div className="App">
      <ChatApp />

export default App;

Remember to replace firebaseConfig with your actual Firebase configuration obtained from the Firebase Console.

Please note that this is a very basic example and lacks user authentication and more advanced features. In a real-world application, you would implement user authentication, handle user-specific messages, and potentially integrate more complex features like message history, user profiles, and more.