StackOverFlow-32855039

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  model: [
    {
      name: "Book1",
      thing: 'thinsadfas'
    }, 
    {
      name: "Book2",
      thing: 'ksadfasdkfjlsaf'
    },
    {
      name: "Book3",
      thing: 'kalsdjfweriuowre'
    }
  ],
  actions: {
  	showCover (book) {
    	console.log(book);
      this.set('coverVisible', true);
    }
  }
});

application.template.hbs

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

<ul>
  {{#each model as |book|}}
      <li> {{book.name}} - 
      
      {{#if coverVisible}}
      	{{book.thing}}
      {{/if}}
      
      <button {{action "showCover" book}}>Show Cover </button>
      
      </li>
  {{/each}}
</ul>

twiddle.json

{
  "version": "0.4.11",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}