Nav Toggle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  navbar: Ember.inject.service()
});

application.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  navToggled:false,
  navbar: Ember.inject.service(),
  actions: {
   toggleMenu() {
   	 this.toggleProperty('navbar.toggled');
     console.log(this.get('navbar.toggled'));
   } 
  }
});

application.template.hbs

<style>
.nav-toggle {
	cursor: pointer;
}
</style>
<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<div class="nav-toggle"><a {{action (action (mut navbar.toggled))}}>&#9776;</a></div>
{{if navbar.toggled 'yes' 'no'}}
<br>

navbar.service.js

import Ember from 'ember';

export default Ember.Service.extend(Ember.ActionHandler, {
  toggled: true,
  
  actions: {
    toggleMenu() {
      console.log("yup");
    }
  }
});

twiddle.json

{
  "version": "0.5.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "1.13.13"
  }
}