jQuery Fade

<!DOCTYPE html>
<html>
<head>
    <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
</head>
<body style="font-family: sans-serif; padding: 20px;">
    <button id="btnFade" style="padding:8px 16px; cursor:pointer;">Fade Out Box</button>
    <div id="kotakFade" style="width:120px; height:120px; background:#fca311; margin-top:15px; border-radius:8px;"></div>

    <script>
        $('#btnFade').click(function() {
            $('#kotakFade').fadeToggle('slow');
        });
    </script>
</body>
</html>