Modifying the code

1. open App.js 

You should see the pre-included code

import React from 'react';
import logo from './logo.svg';
import './App.css';

function App() {
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
          Edit <code>src/App.js</code> and save to reload.
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export default App;


2. replace everything with just this 

import React from 'react';

const App = () => {
  return <h1>Hello World!</h1>

export default App;


3. Save the file 

4. Open the terminal in this directory and run 

npm start


5. Now open your web browser and go to this link http://localhost:3000/. You should see something like this

Hurray 🥳 You have edited your own ReactJS application. Pat your back and get ready for even more action. 


Note -

function App () {


const App = () => {


Are both valid ways of defining a function in JavaScript ES6. For this series we will be using the second method also called as "fat arrow" method as it provides some additional benefits over simple functions.


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