在React中动态创建多级下拉列表，并在下拉列表中获取所选子菜单的值

import React, { Component } from 'react';

class DropdownMenu extends Component {
  constructor(props) {
    super(props);
    this.state = {
      selectedValue: '',
      menuData: [
        {
          label: '菜单1',
          value: 'menu1',
          children: [
            {
              label: '子菜单1',
              value: 'submenu1',
              children: [
                {
                  label: '子子菜单1',
                  value: 'subsubmenu1',
                  children: []
                },
                {
                  label: '子子菜单2',
                  value: 'subsubmenu2',
                  children: []
                }
              ]
            },
            {
              label: '子菜单2',
              value: 'submenu2',
              children: []
            }
          ]
        },
        {
          label: '菜单2',
          value: 'menu2',
          children: []
        }
      ]
    };
  }

  handleChange = (event) => {
    const selectedValue = event.target.value;
    this.setState({ selectedValue });
  }

  renderDropdownMenu = (menuData) => {
    return (
      <select value={this.state.selectedValue} onChange={this.handleChange}>
        <option value="">请选择</option>
        {menuData.map((menuItem) => (
          <option key={menuItem.value} value={menuItem.value}>{menuItem.label}</option>
        ))}
      </select>
    );
  }

  render() {
    const { menuData } = this.state;
    return (
      <div>
        {this.renderDropdownMenu(menuData)}
      </div>
    );
  }
}

export default DropdownMenu;