<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' }); });