New Twiddle

controllers.application.js

import Ember from 'ember';
import file from '../file';

export default Ember.Controller.extend({
	  appName: 'Ember Twiddle',
  	variable: file.variable,
   	adToShow: Ember.computed("file.variable.{catType,listCategory,search}", function() {
    if (file.variable.search == true) {
      return "ad-search"
    }else if (file.variable.listCategory) {
      return "ad-listing-details";
    }else if (file.variable.catType== 'home'){
      return "ad-homepage";
    }
  }),
});

file.js

var variable = {
	search: true,
  listCategory: false,
  catType: 'home'
};

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
adToShow: {{adToShow}}

<br>
<br>

{{input type="checkbox" name="b" checked=variable.search}} search

<br>
{{input type="checkbox" name="c" checked=variable.listCategory}} list category

<br>

{{input  name="a" value=variable.catType}} Cat type

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"
  }
}