Normal Checkbox

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  actions: {
    inputChanged(value) {
      if (typeof this.onchange === 'function') {
        this.onchange(value);
      }
      console.log(value);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

helpers.not.js

import Ember from 'ember';

export function not([val]/*, hash*/) {
  return !val;
}

export default Ember.Helper.helper(not);

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component value=val
   change=(action (mut val) (not val))}}
<br>
<br>

templates.components.my-component.hbs

<input type="checkbox" checked={{value}} onchange={{action "inputChanged" value="target.value"}}>

{{value}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}