html域名识别跳转

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Domain Redirect</title>
    <script>
        window.onload = function() {
            var hostname = window.location.hostname;
            if (hostname === 'example.com') {
                window.location.href = 'https://www.example.com/en/';
            } else if (hostname === 'cn.example.com') {
                window.location.href = 'https://www.example.com/cn/';
            } else {
                window.location.href = 'https://www.example.com/default/';
            }
        };
    </script>
</head>
<body>
    <!-- 页面内容 -->
</body>
</html>