New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  a:'initial'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  beforeModel(){
    this._super(...arguments);
    this.transitionTo('index');
  }
});

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  isSomething: true
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('index', { path: '/' })
});

export default Router;

routes.index.js

import Ember from 'ember';

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

templates.application.hbs

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

templates.components.my-component.hbs

Component: {{a}} 
{{yield {b=a} }}

templates.index.hbs

{{#my-component as |c|}}
	{{input value=c placeholder="enter x" }}
{{/my-component}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}