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

---
order: 0
title:
  zh-CN: 基本
  en-US: Basic
---

## zh-CN

最简单的用法。

## en-US

The simplest usage.

```tsx
import React, { useState } from 'react';
import { Affix, Button } from 'antd';

const Demo: React.FC = () => {
  const [top, setTop] = useState(10);
  const [bottom, setBottom] = useState(10);

  return (
    <div>
      <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>
    </div>
  );
};

ReactDOM.render(<Demo />, mountNode);
```