JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://jqueryui.com/ui/jquery.ui.datepicker.js"></script>
<link rel="stylesheet" href="http://jqueryui.com/themes/base/jquery.ui.all.css">
<script src="http://jqueryui.com/ui/jquery.ui.widget.js"></script>
<script src="http://jqueryui.com/ui/jquery.ui.core.js"></script>
<input type="text" class="datepicker" />

JavaScript

$('.datepicker').on('focus', function () {
console.log("1");
  $(this).datepicker();
});