New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  didReceiveAttrs() {
    console.log('got prop', this.get('prop'));
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  model: Ember.Object.create({data: {foo: 'bar'}}),
  
  init() {
  	Ember.run.later(() => {
      Ember.set(this, 'model.data.foo', 'baz');
    }, 3000);
  },
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{my-component prop=model.data.foo}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}

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": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}