New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  count: 0,
  showInput: function() {
    return this.get('count') > 2;
  }.property('count'),
  actions: {
    increment: function() { this.set('count', this.count + 1); },
    reset: function() { this.set('count', 0) }
  }
});

templates.application.hbs

<h1>{{count}}</h1>
<button onclick={{action "increment"}}>increment</button>
<button onclick={{action "reset"}}>reset</button>
{{#if showInput}}
  <br /><br />
  <input type="text" value={{count}} />
{{/if}}
{{outlet}}

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"
  }
}