test

controllers.application.js

import Ember from 'ember';

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

my-test.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
  	hovered() {
    	alert('yeah');
    }
  }
});

templates.application.hbs

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

templates.components.my-test.hbs

{{yield}}
<div {{action 'hovered' on='mouse-enter'}}>dashed-event name</div>
<br/>
<br/>
<br/>
<br/>
<br/>
<div {{action 'hovered' on='mouseEnter'}}>CamelCase event name</div>

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}