JSFiddle - React, Tailwind, and code Playground

HTML

<html lang="en">
    
    <head>
        <meta charset="utf-8" />
        <title>jQuery UI Tabs - Default functionality</title>
        <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.0/themes/base/jquery-ui.css"
        />
        <script src="http://code.jquery.com/jquery-1.8.3.js"></script>
        <script src="http://code.jquery.com/ui/1.10.0/jquery-ui.js"></script>
        <link rel="stylesheet" href="/resources/demos/style.css" />
        <script>
            
        </script>
    </head>
    
    <body>
        <div id="loadingDiv">LOADING...</div>
        <div id="tabs">
            <ul>
                <li><a href="#tabs-1">Nunc tincidunt</a>
                </li>
                <li><a href="#tabs-2">Proin dolor</a>
                </li>
                <li><a href="#tabs-3">Aenean lacinia</a>
                </li>
            </ul>
            <div id="tabs-1">
                <p>Proin elit arcu, rutrum commodo, vehicula tempus, commodo a, risus. Curabitur
                    nec arcu. Donec sollicitudin mi sit amet mauris. Nam elementum quam ullamcorper
                    ante. Etiam aliquet massa et lorem. Mauris dapibus lacus auctor risus.
                    Aenean tempor ullamcorper leo. Vivamus sed magna quis ligula eleifend adipiscing.
                    Duis orci. Aliquam sodales tortor vitae ipsum. Aliquam nulla. Duis aliquam
                    molestie erat. Ut et mauris vel pede varius sollicitudin. Sed ut dolor
                    nec orci tincidunt interdum. Phasellus ipsum. Nunc tristique tempus lectus.</p>
            </div>
            <div id="tabs-2">
                <p>Morbi tincidunt, dui sit amet facilisis feugiat, odio metus gravida ante,
                    ut pharetra massa metus id nunc. Duis scelerisque molestie turpis. Sed
                    fringilla, massa eget luctus malesuada, metus eros molestie lectus, ut
                    tempus eros massa ut dolor. Aenean aliquet fringilla sem. Suspendisse sed
     ...

CSS

#loadingDiv {
    background-color:green;
    z-index:10000;
    position:absolute;
    left:50%;
    top:5em;
    width:10em;
    margin-left:-5em;
    height:10em;
    display:none;
}

JavaScript

$(function () {
      for (var i = 1; i < 9; i++) {
          $("#tabs-3").append($("#tabs-3").html());
      }
      $("#tabs").tabs({
          beforeActivate: function () {
              // alert("switching");
              $("#loadingDiv").show();
          },
          activate: function () {
              //alert("switched");
              $("#loadingDiv").hide();
          }
      });
  });