ant-design/components/config-provider/demo/prefixCls.md

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---
order: 99
title:
zh-CN: 前缀
en-US: prefixCls
debug: true
---
## zh-CN
修改组件和图标前缀。
## en-US
Config component and icon prefixCls.
```jsx
import { ConfigProvider, Select, Button } from 'antd';
import { SmileOutlined } from '@ant-design/icons';
import React, { useState } from 'react';
// Ant Design site use `es` module for view
// but do not replace related lib `lib` with `es`
// which do not show correct in site.
// We may need do convert in site also.
const FormSizeDemo = () => {
const [prefixCls, setPrefixCls] = useState('light');
return (
<div>
<Button style={{ marginBottom: '12px' }} type="primary" onClick={() => setPrefixCls('dark')}>
toggle prefixCls
</Button>
<div>
<ConfigProvider prefixCls={prefixCls} iconPrefixCls="bamboo">
<SmileOutlined />
<Select />
</ConfigProvider>
</div>
</div>
);
};
ReactDOM.render(<FormSizeDemo />, mountNode);
```