JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/themes/smoothness/jquery-ui.css">
<select id="select">
<option>One</option>
<option>two</option>
<option>three</option>
</select>

JavaScript

$.widget( "ui.menu", $.ui.menu, {
  focus: function(event){
    console.log('testing focus');
    this._super();
  }
});

$('#select').selectmenu();