JSFiddle - React, Tailwind, and code Playground
HTML
<div class="hello"></div>
<div class="top">sdf</div>
CSS
.hello {
position: relative;
width: 250px; height: 2000px;
background: orange;
}
.top {
position: fixed;
top: 20px; left: 20px;
}
JavaScript
$(window).scroll(function () {
var screenTop = $(document).scrollTop();
$('.top').html(screenTop);
});