old-spike/client/config/design/app.js

import Styles from 'config/styles';
import Templates from 'config/templates';
import {hashHistory} from 'react-router';
import app from './../../app';

Promise.all([
  Templates.sync(),
  Styles.sync()
]).then(()=>{
  jQuery('#compiling_layouts').remove();
  app(hashHistory);
});