Reactjs React Hooks-当我在另一个选择上选择一个选项时，更改选择选项

我是React的新手，当我从另一个select中选择一个选项时，我想更改select的select选项

我有以下代码：

组成部分：

 import React from 'react';
 import {useDispatcher, useSelector} from 'react-redux';
 import {getCounty, getLocality } from '../redux/actions/getData';
 import NativeSelect from '@material-ui/core/NativeSelect'; 


export default function UserDetails() {
const dispatch = useDispatch();
const state = useSelector(state=>state);

const [county, setCounty ] = React.useState("");
const [locality, setLocality ] = React.useState("");

React.useEffect(() => {
 dispatch(getCounty());
}, []);

return (
 <>
#Select 1
   <NativeSelect
     value={county}
     onChange={e => setCounty(e.targe.value))}
   >
    <option><option>
     {state.county.map(el, key) => (
       <option value={el.id} key={key}> {el.name}</option>
     ))}
    </NativeSelect>
 #Select 2
   <NativeSelect
     value={locality}
     onChange={e=>setLocality(e.target.value)}
   >
    <option><option>
     {state.locality.map(el, key) => (
       <option value={el.id} key={key}> {el.name}</option>
     ))}
    </NativeSelect>
 </>
)
}

我必须做什么才能使Select 2基于Select 1进行更新？？？ 谁能举个例子？

---

对不起，我的英语不好

您可以在呈现第二个

之前选择

const countyIds = state.county.map(x => x.id)

//assuming that i.county exists, I don't know how it's called
const filteredLocality = state.locality.filter(i => countyIds.includes(i.county)) 

return(
    {filteredLocality.map(el, key) => (
       <option value={el.id} key={key}> {el.name}</option>
     ))}
)

const countyIds=state.county.map（x=>x.id）
//假设i.county存在，我不知道它叫什么
const filteredLocality=state.locality.filter（i=>countyIds.includes（i.county））
返回(
{filteredLocality.map（el，键）=>(
{el.name}
))}
)
在GetLocation的redux操作中，我获取所有数据，然后根据城市id进行过滤？您实际上不需要过滤数据。只需选择将在
中显示的内容
。你可以在运行时这样做，但是如果我在表中有50个地方，性能不是很慢吗？如果你处理大量的数据，请考虑记忆值。代码>使用备忘录
const countyIds = state.county.map(x => x.id)

//assuming that i.county exists, I don't know how it's called
const filteredLocality = state.locality.filter(i => countyIds.includes(i.county)) 

return(
    {filteredLocality.map(el, key) => (
       <option value={el.id} key={key}> {el.name}</option>
     ))}
)