jquery弹出层禁止滚动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 弹出层禁止滚动</title>
    <style>
        .popup {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 9999;
        }
        .popup.active {
            display: block;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div class="popup" id="myPopup">
        <div>
            <h2>这是一个弹出层</h2>
            <p>这是一个示例弹出层内容。</p>
            <button id="closePopup">关闭</button>
        </div>
    </div>

    <button id="openPopup">打开弹出层</button>

    <script>
        $(document).ready(function() {
            $('#openPopup').click(function() {
                $('#myPopup').addClass('active');
                $('body').css('overflow', 'hidden');
            });

            $('#closePopup').click(function() {
                $('#myPopup').removeClass('active');
                $('body').css('overflow', 'auto');
            });
        });
    </script>
</body>
</html>