<demo>

### Basic

The simplest usage.

```jsx live
<>
  <Sticky offsetTop={60}>
    <Button btnType="primary">
      Affix top
    </Button>
  </Sticky>
  <br />
  <Sticky offsetBottom={10}>
    <Button btnType="primary">
      Affix bottom
    </Button>
  </Sticky>
</>
```

</demo>
