New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  queryParams: ['foo'],
  
  bar: 'bar',
  
  foo: Ember.computed('bar', {
    get() {
      return this.get('bar') + '_baz';
    },
    set(key, value) {
     return value;
    }
  })
});

templates.application.hbs

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

{{input value=bar}}

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.4.3",
    "ember-data": "2.4.3",
    "ember-template-compiler": "2.4.3"
  }
}