Tagless Element ES Class

components.my-component.js

import Ember from 'ember';

export default class MyComponent extends Ember.Component {
  tagName = '';
  
  constructor() {
    super(...arguments);
    
    // Empty string causes runtime error
    // "Assertion Failed: You cannot use `elementId` on a tag-less component"
    // Comment this line to fix
		this.debug = "Lorem ipsum dolor sit amet";
  }
}

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}}

{{outlet}}
<br>
<br>

templates.components.my-component.hbs

<h1>My Component</h1>

<span>debug: {{debug}}</span>

{{yield}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}