New Twiddle

controllers.application.js

import Ember from 'ember';

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

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.accordion.spaced-accordion > .card {
  margin-bottom: 10px;
  border-bottom: 1px solid #DFDFDF !important;
  border-radius: 0.25rem !important;
}

.accordion.spaced-accordion > .card > .card-header {
  border-bottom: 0;
}

.accordion.spaced-accordion > .card .card-body {
  border-top: 1px solid #DFDFDF;
}

templates.application.hbs

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

{{#bs-accordion class="spaced-accordion" as |acc|}}
  {{#acc.item value="1" title="First item"}}
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur ea eos hic neque quia sequi sunt. Amet at atque corporis earum et fugiat illum magnam nisi sapiente voluptatem. Laudantium, quam?</p>
  {{/acc.item}}
  {{#acc.item value="2" as |aitem|}}
    {{#aitem.title}}
      <strong>Second</strong> <i>item</i>
    {{/aitem.title}}
    {{#aitem.body}}
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur ea eos hic neque quia sequi sunt. Amet at atque corporis earum et fugiat illum magnam nisi sapiente voluptatem. Laudantium, quam?</p>
    {{/aitem.body}}
  {{/acc.item}}
  {{#acc.item value="3" title="Third item"}}
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur ea eos hic neque quia sequi sunt. Amet at atque corporis earum et fugiat illum magnam nisi sapiente voluptatem. Laudantium, quam?</p>
  {{/acc.item}}
{{/bs-accordion}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.14.1",
    "ember-template-compiler": "2.14.1",
    "ember-testing": "2.14.1"
  },
  "addons": {
    "ember-bootstrap": "2.0.0"
  }
}