content: import React from 'react';
  import Router from 'react-router';
  import ReactDOM from 'react-dom';
  import createBrowserHistory from 'history/lib/createBrowserHistory';
  import routes from './routes';
  // import Navbar from './components/Navbar';
  
  let history = createBrowserHistory();
  
  ReactDOM.render(<Router history={history}>{routes}</Router>, document.getElementById('app'));