New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.route.js

import Ember from 'ember';
import Mixin from '../mixins/test';

export default Ember.Route.extend(Mixin, {
  foo() {
    var boundSuper = this._super.bind(this);
    Ember.RSVP.resolve().then(() => {
    	boundSuper();
    });
  },
  
  afterModel() {
    this.foo();
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

mixins.test.js

import Ember from 'ember';

export default Ember.Mixin.create({
  foo() {
    alert('foo');
  }
});

twiddle.json

{
  "version": "0.4.14",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.10",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "1.13.10"
  }
}