text: import React from 'react';
  import NavLink from './NavLink';
  
  export default React.createClass({
    render() {
      return (
        <div>
          <h1>React Router Tutorial</h1>
          <ul role="nav">
            <li>
              <NavLink to="/" onlyActiveOnIndex={true}>Home</NavLink>
            </li>
            <li>
              <NavLink to="/about">About</NavLink>
            </li>
            <li>
              <NavLink to="/repos">Repos</NavLink>
            </li>
          </ul>
  
          {this.props.children}
        </div>
      )
    }
  })
  