New Twiddle

components.auto-focus.js

import Ember from 'ember';

const focusableSelector = "input, textarea, select";

export default Ember.Component.extend({
  didInsertElement() {
    this.$(focusableSelector).first().focus();
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions: {
    cancel() {
      alert('cancel action called');
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>
{{#auto-focus}}
  {{input escape-press=(action 'cancel') placeholder='Press escape in me'}}
{{/auto-focus}}

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"
  }
}