simple-fake-checkbox

components.my-fake-checkbox.js

import Ember from 'ember';

export default Ember.Component.extend({
 	checked: false,
  isVisible: true
});

controllers.application.js

import Ember from 'ember';
import stateFor from 'ember-state-services/state-for';

export default Ember.Controller.extend({
  state: stateFor('cart-checkout', 'model'),
  appName: 'Ember Twiddle'
});

initializers.register-state.js

import Ember from 'ember';

const CartCheckout = Ember.Object.extend();

CartCheckout.reopenClass({
  initialState() {
    alert('foo');
  	return { 
      foo: false 
    };
  }
});

export function initialize(application) {
  application.register('state:cart-checkout', CartCheckout);
}

export default {
  name: 'register-state',
  initialize: initialize
};

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
state: {{ state.foo }}
{{my-fake-checkbox checked=state.foo}}
<br>
<br>

templates.components.my-fake-checkbox.hbs

{{input type='checkbox' checked=(mut checked)}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.2",
    "ember-template-compiler": "2.11.2",
    "ember-testing": "2.11.2",
    "ember-data": "2.9.0"
  },
  "addons": {
    "ember-state-services": "3.3.0"
  }
}