finalResponse

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  isDisabled: Ember.computed('finalResponse.{time}', function () {
    console.log(Object.keys(this.get('finalResponse')));
    return !Object.keys(this.get('finalResponse')).length;
  }),
 	finalResponse: undefined,

  init() {
    this._super(...arguments);
    this.set('finalResponse', {}); 
  },
  
  actions: {
    updateProp() {
      const time = new Date().getTime();
      console.log('time', time);
      this.set('finalResponse.time', time);
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

{{my-component}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}

<button {{action 'updateProp'}}>Update</button>
<button disabled={{isDisabled}} style="color:{{if isDisabled 'red'}}">{{if isDisabled 'Disabled' 'enabled'}} button</button>

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"
  }
}