x-select

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  init() {
    this._super(...arguments);
    this.fooArray = [];
  },
  
  actions: {
    something(v) {
      console.log(v);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#x-select value=fooArray on-change=(action "something") multiple=true oneWay=true as |xs|}}
	{{#xs.option value=1}}
  	Foo
  {{/xs.option}}
  {{#xs.option value=2}}
  	Bar
  {{/xs.option}}
  {{#xs.option value=3}}
  	Baz
  {{/xs.option}}
{{/x-select}}
<br>
<br>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {
  	"emberx-select": "2.2.1"
  }
}