Closures

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Closures are awesome!',
  actions: {
    showAppNameWithClosure() {
      alert('This failed because "this" is undefined in the scope of the closure function!');
      var test = function() {
        return this.get('appName');
      }
      var name = test();
      alert(name);           
    },
    showAppNameWithoutClosure() {
      var name = this.get('appName');
      alert(name);      
    }
  }
});

templates.application.hbs

<h1>{{appName}}</h1>
<button {{action "showAppNameWithClosure"}}>Show title with closure</button>
<button {{action "showAppNameWithoutClosure"}}>Show title without closure</button>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}