New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  isEmpty: Ember.computed(function() {
    return Ember.isEmpty({});
  }),
  
  isNone: Ember.computed(function() {
    return Ember.isNone({});
  }),
  
  objectDotKeys: Ember.computed(function() {
    return Object.keys({}).length === 0;
  }),
  
});

templates.application.hbs

<h1>Is {} empty?</h1>

<div>isEmpty(): {{isEmpty}}</div>
<div>isNone(): {{isNone}}</div>
<div>Object.keys(): {{objectDotKeys}}</div>
<br>
<br>

twiddle.json

{
  "version": "0.13.1",
  "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": "2.16.3"
  }
}