double checkbox

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions: {
    runit() {
      console.log(this.get('chequeado'));
    },
    checkedToggle() {
      this.set('isChecked', true);
    }
  }
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<input type="checkbox" name="asdf" onclick={{action "checkedToggle"}} checked={{isChecked}} />
<input type="checkbox" name="asdf" onclick={{action "checkedToggle"}} checked={{isChecked}} />
<button onclick={{action "runit"}}>
  debug it
</button>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}