content: import React from 'react';
  import ReactDOM from 'react-dom';
  
  class App extends React.Component {
  	render() {
  		return (
  			<h1>Hello, cruel world.</h1>
  			);
  		}
  	}
  
  ReactDOM.render(
  	<App />,
  	document.getElementById('app')
  	);