New Twiddle

components.brick-block.js

import Ember from 'ember';

export default Ember.Component.extend({
	willDestroyElement(){
    console.log('willDestroyElement')
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  tagName: 'ul',
  visible: true,
  blocks: Ember.A([
    Ember.Object.create({tag:'ul',position:1}),
    Ember.Object.create({tag:'ol',position:2})
  ]),
  items: Ember.A([
    Ember.Object.create({title:'item 1',position:1}),
    Ember.Object.create({title:'item 2',position:2})
  ]),
  actions: {
   	toggleTag() {
      console.log('setting tagName again')
     	 this.set('tagName','ol')
       this.toggleProperty('visible')
       console.log(this.get('tagName'))
    }
  }
});

templates.application.hbs

{{#if visible}}
	{{brick-block items=items tagName=tagName}}
{{/if}}

<button {{action 'toggleTag'}}>Toggle</button>

templates.components.brick-block.hbs

{{#each items as |item|}}
<li>{{item.title}} - {{item.position}} </li>
{{/each}}

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "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/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js"
  }
}