creat a chat app with react hooks code example

Example 1: how to create react app

npx create-react-app my-app
cd my-app
npm start

Example 2: chat application in react js

import React from 'react';
import { BrowserRouter as Router } from 'react-router-dom'; // added
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
ReactDOM.render(
  <Router>
    <App />
  </Router>
  , document.getElementById('root'));