New Twiddle

components.my-button.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  attributeBindings: ['role'],
  tagName: 'button'
  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    create () {
      window.alert("I did it!")
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<form {{action (action 'create') on='submit'}}>
	<input type='text'>
  {{#my-button role='submit'}}Submit{{/my-button}}
</form>
<br>
<br>

templates.components.my-button.hbs

{{yield}}

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}