content: import React from 'react';
  import ReactDOM from 'react-dom';
  
  export class Input extends React.Component {
    render() {
      return (
        <div>
          <input type="text" onChange={this.handleUserInput} />
          <h1>I am an h1.</h1>
        </div>
      );
    }
  }
  
  ReactDOM.render(
  	<Input />,
  	document.getElementById('app')
  );
  