React 四级联动组件示例 - 省市区镇街道选择

{"title":"React 四级联动组件示例 - 省市区镇街道选择","description":"使用React实现一个四级联动组件，用于选择省份、城市、区县和镇街道。代码示例演示了如何使用useState管理状态、通过onChange事件处理选择改变，并根据选择动态生成选项列表。","keywords":"React, 四级联动, 省市区镇街道, 组件, 选择, 状态管理, useState, onChange, 动态选项, 代码示例","content":""import React, { useState } from 'react';\n\nconst FourLevelCascader = () => {\n const [province, setProvince] = useState('');\n const [city, setCity] = useState('');\n const [district, setDistrict] = useState('');\n const [town, setTown] = useState('');\n\n const handleProvinceChange = (event) => {\n setProvince(event.target.value);\n setCity('');\n setDistrict('');\n setTown('');\n };\n\n const handleCityChange = (event) => {\n setCity(event.target.value);\n setDistrict('');\n setTown('');\n };\n\n const handleDistrictChange = (event) => {\n setDistrict(event.target.value);\n setTown('');\n };\n\n const handleTownChange = (event) => {\n setTown(event.target.value);\n };\n\n return (\n