New Twiddle

controllers.application.js

import Ember from 'ember';

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

mixins.example.js

export default Ember.Mixin.create({
  actions: {
  	myAction() {
    	this.exampleMethod();
    }
  },
  exampleMethod () {
  	console.log('mixin works');
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
    this.route('foo');
    this.route('bar');
});

export default Router;

routes.bar.js

import Ember from 'ember';
import example from '../mixins/example'

export default Ember.Route.extend(example, {

});

routes.foo.js

import Ember from 'ember';
import example from '../mixins/example'

export default Ember.Route.extend(example, {

});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{outlet}}
<br>
<nav style="margin-top: 20px">
{{#link-to 'foo'}}Foo route{{/link-to}} 
<br>
{{#link-to 'bar'}}Bar route{{/link-to}}
</nav>

templates.bar.hbs

<h2> Bar </h2>
<button onclick={{route-action "myAction"}}>click me</button>

templates.foo.hbs

<h2> Foo </h2>
<button onclick={{route-action "myAction"}}>click me</button>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-route-action-helper": "2.0.3"
  }
}