JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
    <script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.4.4.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {
            alert("Is #foo1 visible: " + $("#foo1").is(":visible") + "\nIs #foo2 visible: " + $("#foo2").is(":visible"));
            
        });
    </script>
</head>
<body>
<div id="foo1" style="display:none">foo1 display none</div>
<div id="foo2">foo2 no display property;</div>
</body>
</html>