ant-design/components/affix/demo/basic.md

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---
order: 0
title:
zh-CN: 基本
en-US: Basic
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---
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## zh-CN
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最简单的用法。
## en-US
The simplest usage.
```tsx
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import React, { useState } from 'react';
import { Affix, Button } from 'antd';
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const Demo: React.FC = () => {
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const [top, setTop] = useState(10);
const [bottom, setBottom] = useState(10);
return (
<>
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<Affix offsetTop={top}>
<Button type="primary" onClick={() => setTop(top + 10)}>
Affix top
</Button>
</Affix>
<br />
<Affix offsetBottom={bottom}>
<Button type="primary" onClick={() => setBottom(bottom + 10)}>
Affix bottom
</Button>
</Affix>
</>
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);
};
export default () => <Demo />;
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```