如何在react中选择下拉菜单的选项下添加子选项？

import React, { useState } from 'react';

function DropdownMenu() {
  const [options, setOptions] = useState([
    { label: '选项1', value: 'option1', children: [] },
    { label: '选项2', value: 'option2', children: [] },
    { label: '选项3', value: 'option3', children: [] }
  ]);

  // 其他组件代码...

  return (
    <div>
      {/* 下拉菜单代码 */}
    </div>
  );
}

return (
  <div>
    <select>
      {options.map((option) => (
        <option key={option.value} value={option.value} onChange={(e) => handleOptionChange(e, option)}>
          {option.label}
        </option>
      ))}
    </select>
  </div>
);

function handleOptionChange(event, selectedOption) {
  const { value } = event.target;

  const updatedOptions = options.map((option) => {
    if (option.value === selectedOption.value) {
      return {
        ...option,
        children: [
          ...option.children,
          { label: `子选项${option.children.length + 1}`, value: `child${option.children.length + 1}` }
        ]
      };
    }
    return option;
  });

  setOptions(updatedOptions);
}

return (
  <div>
    <select>
      {options.map((option) => (
        <option key={option.value} value={option.value} onChange={(e) => handleOptionChange(e, option)}>
          {option.label}
        </option>
      ))}
    </select>

    {options.map((option) => (
      option.children.length > 0 && (
        <select key={`${option.value}-children`}>
          {option.children.map((child) => (
            <option key={child.value} value={child.value}>
              {child.label}
            </option>
          ))}
        </select>
      )
    ))}
  </div>
);