ant-design/components/affix/demo/on-change.md

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---
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order: 1
title:
zh-CN: 固定状态改变的回调
en-US: Callback
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---
## zh-CN
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可以获得是否固定的状态。
## en-US
Callback with affixed state.
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```jsx
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import { Affix, Button } from 'antd';
ReactDOM.render(
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<Affix offsetTop={120} onChange={affixed => console.log(affixed)}>
<Button>120px to affix top</Button>
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</Affix>,
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mountNode,
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);
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```