sendAction Closure Action

components.my-component.js

import Ember from 'ember';

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

components.my-nested-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  testBoolean: false,
  
  actions: {
    
    switchBoolean: function() {
      this.toggleProperty('testBoolean');
      console.log(this.get('testBoolean'));
      var testBoolean = this.get('testBoolean');
      this.sendAction('testAction', testBoolean);
    }
    
  }
  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
 		
    myAction: function (testBoolean) {
      alert('testBoolean: ' + testBoolean);
    }
	}
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component testAction=(action "myAction")}} 
<br>
<br>

templates.components.my-component.hbs

{{my-nested-component testAction=(action this.attrs.testAction)}}

templates.components.my-nested-component.hbs

<button {{action 'switchBoolean'}}>Click Me</button>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "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/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js"
  }
}