jquery下拉菜单 联动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Dropdown联动</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <select id="province">
        <option value="">请选择省份</option>
        <option value="beijing">北京</option>
        <option value="shanghai">上海</option>
    </select>

    <select id="city">
        <option value="">请选择城市</option>
    </select>

    <script>
        $(document).ready(function() {
            $('#province').change(function() {
                var province = $(this).val();
                if (province === 'beijing') {
                    $('#city').html('<option value="">请选择城市</option><option value="dongcheng">东城区</option><option value="xicheng">西城区</option>');
                } else if (province === 'shanghai') {
                    $('#city').html('<option value="">请选择城市</option><option value="huangpu">黄浦区</option><option value="jingan">静安区</option>');
                } else {
                    $('#city').html('<option value="">请选择城市</option>');
                }
            });
        });
    </script>
</body>
</html>