New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  renderCount: 0,
  showInput: false,
  
  actions: {
   
    inputRendered() {
      alert('rendered');
      this.incrementProperty('renderCount');
    },
    
    toggleInput() {
      this.toggleProperty('showInput'); 
    }
    
    
  }
  
});

application.template.hbs

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

<button {{action "toggleInput"}}>Toggle</button>

{{#if showInput}}
	{{custom-input onRenderAction=(action "inputRendered")}}
{{else}}
  <h4>You should hit that button</h4>
{{/if}}

<h3>The input has rendered {{renderCount}} times</h3>


<br>
<br>

custom-input.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'input',
  attributeBindings: ['type', 'autofocus', 'value'],
  type="text",
  autofocus=true,
  value="Hi there",
  
  onRenderAction: 'inputRendered',
  
  didInsertElement() {
    this._super();
    this.onRenderAction();
  }
  
});

twiddle.json

{
  "version": "0.6.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.1/ember-template-compiler.js"
  }
}