Init, Sync, didinsertelement

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  didInsertElement() {
    this._super(...arguments);
		this.set('name', Math.random());
		console.log('didInsertElement');
  },
  init(){
    this._super(...arguments);
		console.log('init');
		Ember.run.scheduleOnce('sync', () =>{ 
			console.log('sync');
			this.attrs.syncName.update(Math.random());
		});
  }
});

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>
name - SyncName
<br>
<br>
{{name}} - {{syncName}}
<hr>
{{my-component name=name syncName=syncName}}
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

{{name}} - {{syncName}}
{{yield}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "2.10.0",
    "ember-template-compiler": "release",
    "ember-testing": "release"
  },
  "addons": {}
}