Ember Modal Dialog & Focus Trap

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

templates.application.hbs

<br>
<br>
<ModalDialog>
  <FocusTrapper @cycle=true>
    Oh hai there!
    <form action="">
      <label>You must fill out this input field: <input type="text"></label>
      <label>And this input field: <input type="text"></label>
    </form>
  </FocusTrapper>
</ModalDialog>
<br>
<br>

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",
    "ember-modal-dialog": "2.4.3",
    "ember-focus-trapper": "0.3.0"
  }
}