New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['person.firstName'],
  appName: 'Ember Twiddle',
  person: Ember.Object.create(),
  
  actions: {
  	setFirstName: function() {
    	this.set('person.firstName', 'Hello');  
    }
  }
});

application.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: {
  	'person.firstName': {
    	as: 'firstName'  
    }
  }
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<button {{action 'setFirstName'}}>Set</button>
{{person.firstName}}
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.6.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}