New Twiddle

application.controller.js

import Ember from 'ember';

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

application.template.hbs

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

<style>
 .on { background-color: green; }
 .off { background-color: red; }
</style>

{{my-component}}

<hr />
{{my-component}}

my-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNameBindings: ['isSelected:on:off'],
  isSelected: true
});

my-component.template.hbs

Selected: {{input type='checkbox' checked=isSelected}}<br />

isSelected: {{isSelected}}

twiddle.json

{
  "version": "0.6.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember-template-compiler.js"
  }
}