Build a Chat Application: React & JavaScript

Develop a real-time chat application using WebSockets or a library like Socket.io.

Full Implementation

Build simple real-time chat application using React on the client-side and Node.js with Socket.io on the server-side. Here’s a summary of the files:

Server-side (chat-app-server):

• server.js: Node.js server using Socket.io.

Client-side (chat-app-client):

• src/Chat.js: Chat component.
• src/App.js: Main app file including the Chat component.
• src/App.css: Basic styling for the chat application.

Step 1: Set Up the Server with Node.js and Socket.io

mkdir chat-app-server
cd chat-app-server
npm init -y


npm install express socket.io

Create the server file:

// server.js
const express = require('express');
const http = require('http');
const socketIo = require('socket.io');

const app = express();
const server = http.createServer(app);
const io = socketIo(server);

io.on('connection', (socket) => {
  console.log('New client connected');

  socket.on('sendMessage', (message) => {
    io.emit('receiveMessage', message);
  });

  socket.on('disconnect', () => {
    console.log('Client disconnected');
  });
});

const PORT = process.env.PORT || 4000;
server.listen(PORT…