trying to load app in router's 404 handler

router.diff

import Backbone from 'backbone';
import $ from 'jquery';

+ import AppFinder from './app_finder';

export default Backbone.Router.extend({
  routes: {
    '': 'home',
    'main_app_part': 'mainAppPart',
    '*handleMissingRoute': 'handle404'
  },

  home() {
    $('#app').html("You're on the home page");
  },

  mainAppPart() {
    $('#app').html("You're viewing part of the main app, no async bundle loading here");
  },

- handle404() {
-   alert('404');
- },
+ handle404(path) {
+   const mini_app_name = AppFinder(path);
+
+   if (mini_app_name) {
+     require.ensure([], require => {
+       const App = require('./apps/' + mini_app_name + '/index.js').default;
+       App();
+       Backbone.history.loadUrl(); // just refreshing the current path, because we've added new paths that we can handle
+     });
+   } else {
+    alert('404');
+   }
+ },
});