jquery 设置层屏幕居中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Center Layer</title>
    <style>
        #centerLayer {
            position: absolute;
            width: 300px;
            height: 200px;
            background-color: #f0f0f0;
            border: 1px solid #ccc;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div id="centerLayer">居中的层</div>

    <script>
        $(document).ready(function() {
            function centerLayer() {
                var layer = $('#centerLayer');
                var windowWidth = $(window).width();
                var windowHeight = $(window).height();
                var layerWidth = layer.outerWidth();
                var layerHeight = layer.outerHeight();

                var top = (windowHeight - layerHeight) / 2;
                var left = (windowWidth - layerWidth) / 2;

                layer.css({
                    top: top + 'px',
                    left: left + 'px'
                });
            }

            centerLayer();

            $(window).resize(function() {
                centerLayer();
            });
        });
    </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Center Layer</title>
    <style>
        body, html {
            height: 100%;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        #centerLayer {
            width: 300px;
            height: 200px;
            background-color: #f0f0f0;
            border: 1px solid #ccc;
        }
    </style>
</head>
<body>
    <div id="centerLayer">居中的层</div>
</body>
</html>