ember-spread

components.my-component.js

import Ember from 'ember';
import SpreadMixin from 'ember-spread'
export default Ember.Component.extend(SpreadMixin, {
	didUpdateAttrs() {
		this._super(...arguments);
		console.log('changed');
  },
	actions: {
		updateFromComponent() {
			this.set('options.a', `Component - ${Math.random()}`);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
	a: 'a',
	observeA: Ember.observer('a', function() {
   	console.log('observer triggered');
  }),
	actions: {
		updateFromController() {
			this.set('a', `Controller - ${Math.random()}`);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component options=(hash a=a)}}
<hr>
<button {{action 'updateFromController'}}> updateFromController </button>
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}
Value----{{a}}
<hr>
<button {{action 'updateFromComponent'}}> updateFromComponent </button> 

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-spread": "3.0.1"
  }
}