content: import React from 'react';
  import Router from 'react-router';
  import routes from './routes';
  
  // Never render to body. Everybody updates it.
  // https://medium.com/@dan_abramov/two-weird-tricks-that-fix-react-7cf9bbdef375
  const app = document.getElementById('app');
  
  Router.run(routes, Router.HistoryLocation, (Handler) => {
    console.time('app render on route change'); // eslint-disable-line no-console
    React.render(<Handler />, app, () => {
      console.timeEnd('app render on route change'); // eslint-disable-line no-console
    });
  });
  
  // if ('production' === process.env.NODE_ENV) {
  //   // TODO: Report app errors.
  // }
  