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45 lines
953 B
Markdown
45 lines
953 B
Markdown
---
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order: 3.3
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version: 4.20.0
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title:
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zh-CN: 字段监听 Hooks
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en-US: Watch Hooks
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---
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## zh-CN
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`useWatch` 允许你监听字段变化，同时仅当改字段变化时重新渲染。
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## en-US
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`useWatch` helps watch the field change and only re-render for the value change.
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```tsx
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import React from 'react';
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import { Form, Input, Typography } from 'antd';
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const Demo = () => {
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const [form] = Form.useForm<{ field1: string; field2: string }>();
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const nameValue = Form.useWatch(['field1'], form);
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return (
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<>
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<Form form={form} layout="vertical" autoComplete="off">
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<Form.Item name="field1" label="Field 1 (Watch to trigger rerender)">
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<Input />
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</Form.Item>
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<Form.Item name="field2" label="Field 2 (Not Watch)">
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<Input />
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</Form.Item>
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</Form>
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<Typography>
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<pre>Field 1 Value: {nameValue}</pre>
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</Typography>
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</>
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);
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};
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export default Demo;
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```
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