ant-design/components/input/demo/autosize-textarea.md

---
order: 6
title:
  zh-CN: 适应文本高度的文本域
  en-US: Autosizing the height to fit the content
---

## zh-CN

`autoSize` 属性适用于 `textarea` 节点，并且只有高度会自动变化。另外 `autoSize` 可以设定为一个对象，指定最小行数和最大行数。

## en-US

`autoSize` prop for a `textarea` type of `Input` makes the height to automatically adjust based on the content. An option object can be provided to `autoSize` to specify the minimum and maximum number of lines the textarea will automatically adjust.

```jsx
import { Input } from 'antd';

const { TextArea } = Input;

class Demo extends React.Component {
  state = {
    value: '',
  };

  onChange = ({ target: { value } }) => {
    this.setState({ value });
  };

  render() {
    const { value } = this.state;

    return (
      <>
        <TextArea placeholder="Autosize height based on content lines" autoSize />
        <div style={{ margin: '24px 0' }} />
        <TextArea
          placeholder="Autosize height with minimum and maximum number of lines"
          autoSize={{ minRows: 2, maxRows: 6 }}
        />
        <div style={{ margin: '24px 0' }} />
        <TextArea
          value={value}
          onChange={this.onChange}
          placeholder="Controlled autosize"
          autoSize={{ minRows: 3, maxRows: 5 }}
        />
      </>
    );
  }
}

export default Demo;
```