calculatelayout

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
layout: Ember.computed('shouldRender', function() {
  return !this.get('shouldRender') ? '' : 'my-component';
}),
  init() {
    this._super(...arguments);
    this.set('shouldRender', false);
    console.log(this.isVisible);
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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

templates.components.my-component.hbs

<h1> component content rendered </h1>

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"
  }
}