JSFiddle - React, Tailwind, and code Playground

HTML

<div id="scrollTop">0</div>
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br /><br />
<br />
<br /><br />
<br />
<br />
<p>the bottom!</p>

CSS

#scrollTop {
    position: absolute;
}

JavaScript

$(function() {
    $(window).scroll(function() {
        $('#scrollTop').css('top', $(window).scrollTop()).text($(window).scrollTop());
    });
});