New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  classNames: ['demo'],
  attributeBindings: [
    'disabled',
    'disabled:aria-disabled'
  ],
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  isDisabled: true,
  
  actions: { toggleDisabled() { this.set('isDisabled', !this.get('isDisabled')) } }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
.demo {
  width: 200px;
  height: 100px;
  border: 1px solid;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<button {{action "toggleDisabled"}}>Toggle</button>
{{#my-component disabled=isDisabled}}{{isDisabled}}{{/my-component}}

templates.components.my-component.hbs

{{yield}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}