index.js
index.html
 


import React from 'react';
import ReactDOM from 'react-dom';

const myfirstelement = <h1>Hello React!</h1>

ReactDOM.render(myfirstelement, document.getElementById('root'));

/*
You are now watching a React file
through our 'Show React' tool.
Click the tab to check out
the 'index.html' file as well.
*/

localhost:3000