power-select-max-select

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  init(){
    this.set('bindingItem', this.get('selectedItem'));
  },
  
  matchingTenure : ["12", "24", "36", "48", "61"],
  
  selectedItem : Ember.computed.max('matchingTenure')
  
});

templates.application.hbs

{{#power-select label="Instalment Duration" 
        labelPosition="left"
        options=matchingTenure
        selected=bindingItem 
        searchEnabled=false
        renderInPlace=true
        class="installment-duration"
        onchange=(action (mut bindingItem)) as |data|}}
        {{data}}
    {{/power-select}}

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-truth-helpers": "1.3.0",
    "ember-power-select": "1.9.6"
  }
}