power-select-initially-open

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  options: [],
  showSelect: false,
  
  actions: {
    onchange() {},
    
    showSelect() {
      this.set('showSelect', true);
    }
  }
});

templates.application.hbs

<h1>Test power select with initiallyOpened=true</h1>

<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>
<p>---</p>

{{#if showSelect}}
	{{#power-select
		options=options
		onchange=(action 'onchange')
  	initiallyOpened=true
	}}
	{{/power-select}}
{{else}}
	<button {{action 'showSelect'}}>Show select</button>
{{/if}}

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",
    "ember-power-select": "1.6.1"
  }
}