ant-design/components/select/demo/coordinate.md

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---
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order: 7
title:
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zh-CN: 联动
en-US: coordinate
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---
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## zh-CN
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省市联动是典型的例子。
推荐使用 [Cascader](/components/cascader/) 组件。
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## en-US
Coordinating the selection of provinces and cities is a common use case and demonstrates how selection can be coordinated.
Using the [Cascader](/components/cascader) component is strongly recommended instead as it is more flexible and capable.
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```jsx
import { Select } from 'antd';
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const { Option } = Select;
const provinceData = ['Zhejiang', 'Jiangsu'];
const cityData = {
Zhejiang: ['Hangzhou', 'Ningbo', 'Wenzhou'],
Jiangsu: ['Nanjing', 'Suzhou', 'Zhenjiang'],
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};
const App = () => {
const [cities, setCities] = React.useState(cityData[provinceData[0]]);
const [secondCity, setSecondCity] = React.useState(cityData[provinceData[0]][0]);
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const handleProvinceChange = value => {
setCities(cityData[value]);
setSecondCity(cityData[value][0]);
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};
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const onSecondCityChange = value => {
setSecondCity(value);
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};
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return (
<>
<Select defaultValue={provinceData[0]} style={{ width: 120 }} onChange={handleProvinceChange}>
{provinceData.map(province => (
<Option key={province}>{province}</Option>
))}
</Select>
<Select style={{ width: 120 }} value={secondCity} onChange={onSecondCityChange}>
{cities.map(city => (
<Option key={city}>{city}</Option>
))}
</Select>
</>
);
};
ReactDOM.render(<App />, mountNode);
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```