JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Text area test</title>
</head>
<body>

<div id="hi" style="display:none;">
    <div id="bye" style="width:200px;height:100px;"> </div>
</div>
</body>
</html>

JavaScript

alert($("#bye").css("width"));