tmp

application.controller.js

import Ember from 'ember';

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

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}

helpers.class-for.js

import Ember from 'ember';

export function classFor([owner, ...classNames]) {
  return classNames.map(className => owner.classFor(className)).join(' ');
}

export default Ember.Helper.helper(classFor);

initializers.styles.js

import Ember from 'ember';

export default {
  name: 'styles',
  initialize(app) {
		app.registerOptionsForType('styles', { instantiate: false });

    Ember.Component.reopen({
      styles: stylesComputed,
      classFor(name) {
        return this.get('styles')[name] || name;
      }
    });
  }
};

const stylesComputed = Ember.computed(function() {
	const [_type, key] = this._debugContainerKey.split(':', 2);
  return this.container.lookup(`styles:${key}`);
});

my-component.component.js

import Ember from 'ember';

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

my-component.styles.js

export default {
  foo: 'asdfastd_foo',
  bar: 'afdsd534_bar ghfda540_bar'
};

my-component.template.hbs

<div class="{{class-for this 'foo'}}">
	<div class="{{class-for this 'bar' 'baz'}}">hello</div>
</div>

router.js

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

const Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
});

export default Router;

twiddle.json

{
  "version": "0.4.17",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}