Ember Action Passing

components.test-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  count: 0,
  lastSource: 'nowhere',
  show: false,
  actions: {
    showModal() {
      this.set('show', true);
    },
    close() {
    	this.set('show', false);
  	},
    accept(source) {
      this.set('lastSource', source);
    	this.incrementProperty('count');
      this.set('show', false);
  	}
  }
});

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>
{{test-component}}
{{outlet}}
<br>
<br>

templates.components.inner-component.hbs

this is true
<button onclick={{action this.attrs.accept}}>Also accept</button>

templates.components.test-component.hbs

<b>Hi, you've accepted {{count}} times, last time from {{lastSource}}</b>
<button onclick={{action 'showModal'}}>Show</button>
{{test-modal show=show close=(action "close") accept=(action "accept")}}

templates.components.test-modal.hbs

modal status {{show}}
{{#if show}}
	<p>This is a test modal!</p>
  <button onclick={{this.attrs.close}}>Close</button>
  <button onclick={{action this.attrs.accept "outer"}}>Accept</button>
  {{inner-component accept=(action this.attrs.accept "inner")}}
{{/if}}

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0",
    "ember-htmlbars-inline-precompile": "0.3.2"
  },
  "addons": {}
}