Ember Checkbox focus-in event

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Checkbox focus test',
  
  actions: {
  	focusInAction() {
    	alert('Focused');
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>

<label>
	{{ input type="checkbox" focus-in="focusInAction" }}
  Simple checkbox
</label>

twiddle.json

{
  "version": "0.4.11",
  "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.debug.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"
  }
}