searchable selectbox

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/selectize.js/0.12.6/js/standalone/selectize.min.js" integrity="sha256-+C0A5Ilqmu4QcSPxrlGpaZxJ04VjsRjKu+G82kl5UJk=" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/selectize.js/0.12.6/css/selectize.bootstrap3.min.css" integrity="sha256-ze/OEYGcFbPRmvCnrSeKbRTtjG4vGLHXgOqsyLFTRjg=" crossorigin="anonymous" />

<select id="select-state" placeholder="Pick a state...">
  <option value="">Select a state...</option>
  <option value="AL">Alabama</option>
  <option value="AK">Alaska</option>
  <option value="IL">Illinois</option>
  <option value="IN">Indiana</option>
</select>

$(document).ready(function () {
  $('#select-state').selectize({
  	sortField: 'text'
  });
});