willDestroyElement myths

components.nested-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  willDestroyElement: function(){
    console.log("Will Destroy Element of Nested Component");
  }
});

components.select-box.js

import Ember from 'ember';

export default Ember.Component.extend({
    willDestroyElement: function(){
        console.log("Will Destroy Element of Container Component");
    }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions:{
    removeContainer: function(){
       $("#containerElement").remove();
    }
  }
});

templates.application.hbs

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

<button {{action "removeContainer"}}>Remove Component</button>
{{#select-box id="containerElement"}}
  {{#nested-component}}
  Content of the component....
  {{/nested-component}}
{{/select-box}}

<br>
<br>

templates.components.nested-component.hbs

<span>{{yield}}</span>

templates.components.select-box.hbs

{{yield}}

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"
  }
}