New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  value: null,
  bad: null,
  options: [
  	{ value: 'value1', label: 'label1' },
    { value: 'value2', label: 'label2' },
    { value: 'value3', label: 'label3' },                                      
  ]
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

<h3>This select works and its value is: {{value}}</h3>
<XSelect @value={{value}} @onChange={{mut value}} as |xs|>
  {{#each options as |opt| }}
    <xs.option @value={{opt.value}}>{{opt.label}}</xs.option>
  {{/each}}
</XSelect>


<h3>This select has id and doesn't work and its value is: {{bad}}</h3>
<XSelect @value={{bad}} @onChange={{mut bad}} as |xs|>
  {{#each options as |opt| }}
    <xs.option @value={{opt.value}}>{{opt.label}}</xs.option>
  {{/each}}
</XSelect>

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": {
    "emberx-select": "4.0.0-beta"
  }
}