text: import React, { Component } from 'react';
  
  
  class Nav extends Component {
    render() {
      return (
        <div className="App">
          <ul className="App-header">
            <li><h1 className="App-title">ReactTube</h1></li>
          </ul>
        </div>
      );
    }
  }
  
  export default Nav;
  