JSFiddle - React, Tailwind, and code Playground

HTML

Browser Size:<br>
<div id="size"></div>
<br><br>
Screen Size
<div id="size2"></div>

CSS

#test {box-shadow: 5px 5px 25px #000; position: absolute; top: 100px; left: 100px; height: 100px; width: 100px;}

JavaScript

$(window).on('resize', showSize);

showSize();

function showSize() {
    $('#size').html('HEIGHT : '+$(window).height()+'<br>WIDTH : '+$(window).width());
    $('#size2').html('HEIGHT : '+screen.height+'<br>WIDTH : '+screen.width);
}