sendClosureAction

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  actions: {
    hello() {
      alert('world');
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#x-button click=(action 'hello')}}
Hello
{{/x-button}}
{{#x-button}}
Argh
{{/x-button}}
<br>
<br>

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "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"
  }
}

x-button.component.js

import Ember from 'ember';

Ember.Component.reopen({
  sendClosureAction(actionName, ...args) {
    if (this.attrs[actionName]) {
      this.attrs[actionName](...args);
    }
  }
});

export default Ember.Component.extend({
  tagName: 'button',
	click() {
    this.sendClosureAction('click')
  }
});

x-button.template.hbs

{{yield}}