JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://jquery.malsup.com/block/jquery.blockUI.js"></script>
<input type="button" id="Button3" value="click me"/>

JavaScript

$(document).ready(function() {
    $("#Button3").click(function() {
        $.blockUI();
        setTimeout(function() {
            $.unblockUI({
                onUnblock: function() {
                    alert('onUnblock');
                }
            });
        }, 2000);
    });
});