Test

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  list: [11, 22],
  appName:'Ember Twiddle',
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
aa
{{#each list as |item|}}
		{{item}}
    {{my-item}}
{{/each}}
bbb
<br>
<br>

my-item.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

my-item.template.hbs

{{yield}}
test

twiddle.json

{
  "version": "0.4.13",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.10/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.13/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.10/ember-template-compiler.js"
  }
}