old_contents: var React = require('react');
  var Link = require('react-router').Link;
  
  var App = React.createClass({
      render: function () {
          return (
              <nav className="header navbar navbar-inverse">
                  <div className="container-fluid">
                      <div className="navbar-header">
                          <button type="button"
                                  className="navbar-toggle collapsed"
                                  data-toggle="collapse"
                                  data-target="#navbar">
                              <span className="sr-only">Toggle navigation</span>
                              <span className="icon-bar"></span>
                              <span className="icon-bar"></span>
                              <span className="icon-bar"></span>
                          </button>
                          <Link className="navbar-brand"
                                to="app">Anime storage</Link>
                      </div>
  
                      <div className="collapse navbar-collapse" id="navbar">
                          <ul className="nav navbar-nav">
                              <li>
                                  <Link to="app">Dashboard</Link>
                              </li>
                          </ul>
  
                          <ul className="nav navbar-nav navbar-right">
                              <li>
                                  <Link to="profile">Profile</Link>
                              </li>
                          </ul>
                      </div>
                  </div>
              </nav>
          );
      }
  });
  
  module.exports = App;
new_contents: var React = require('react');
  var Link = require('react-router').Link;
  
  var Header = React.createClass({
      render() {
          return (
              <nav className="header navbar navbar-inverse">
                  <div className="container-fluid">
                      <div className="navbar-header">
                          <button type="button"
                                  className="navbar-toggle collapsed"
                                  data-toggle="collapse"
                                  data-target="#navbar">
                              <span className="sr-only">Toggle navigation</span>
                              <span className="icon-bar"></span>
                              <span className="icon-bar"></span>
                              <span className="icon-bar"></span>
                          </button>
                          <Link className="navbar-brand"
                                to="app">Anime storage</Link>
                      </div>
  
                      <div className="collapse navbar-collapse" id="navbar">
                          <ul className="nav navbar-nav">
                              <li>
                                  <Link to="app">Dashboard</Link>
                              </li>
                          </ul>
  
                          <ul className="nav navbar-nav navbar-right">
                              <li>
                                  <Link to="profile">Profile</Link>
                              </li>
                          </ul>
                      </div>
                  </div>
              </nav>
          );
      }
  });
  
  module.exports = Header;
subject: fix header component name