New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  name: 'I am a name!',
  items: Ember.computed(function() {
    return [
      Ember.Object.create({
        parent: this,
        name: Ember.computed.alias('parent.name')
      })
    ];
  })
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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

{{my-component}}

templates.components.my-component.hbs

{{name}}

<ul>
  {{#each items as |item index|}}
    <li>{{index}} - {{input value=item.name}}</li>
  {{/each}}
</ul>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}