text: import React from 'react';
  import {Link} from 'react-router'
  
  
  export const Header = (props) => {
  
      return (
          <nav className="navbar navbar-default">
              <div className="container">
                  <div className="navbar-header">
                      <ul className="nav navbar-nav">
                          <li><Link to={'/home'} activeStyle={{color: 'red'}}>Home</Link></li>
                          <li><Link to={'/user/'+ (2+2)} activeClassName={'active'}>User</Link></li>
                      </ul>
  
                  </div>
              </div>
          </nav>
      )
  }