self-rendering compoennt

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  onInput(e) {
    let owner = Ember.getOwner(this);

    let component = Ember.Component.extend({
      layout: Ember.HTMLBars.compile(e.target.value),
      renderer: owner.lookup('renderer:-dom')
    });
    
    let componentName = `dynamic-${Ember.guidFor(component)}`;
    let componentLookupKey = `component:${componentName}`;
    
    owner.register(componentLookupKey, component);
    
    let target = document.querySelector('.target');
    
    this.set('componentName', componentName);
  }
  
});

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>
{{my-component}}
<br>
<br>
<div class="target">
</div>

templates.components.my-component.hbs

<textarea oninput={{action onInput}}></textarea>

{{component componentName}}

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0"
  },
  "addons": {}
}