Textarea Autosize

Resize a native textarea according to content within row limits.

This guide covers Material UI Core with the default Emotion engine; extensions and additional demos are explicitly classified.

Use case and business boundary

It does not provide a full TextField label/error composition; give a real label and preserve textarea event types.

Native composition and scope

TextareaAutosize

Preserve native Material UI composition and types; do not substitute JGuang UI/Base UI/Radix APIs. Example entries are not extra components.

Native installation and initialization

npm install @mui/material@9.4.0 @emotion/react@11.14.0 @emotion/styled@11.14.1

Use native npm and Emotion, not an invented JGuang UI Registry URL. Place examples inside native ThemeProvider; choose CssBaseline or ScopedCssBaseline for the project. Inspect React, existing providers, lockfile and SSR first. Never overwrite files or conceal peer conflicts. This batch verified React 19.2.8; React 18 and below require matching react-is. See the included bilingual setup guide.

Practical native parameters

These selected parameters are not a flattened universal API. Preserve the native declaring owner, slot structure, nullable values and generics.

Runnable native examples

Machine keys select example entries, not universal variant props. Native demo JSX/data stay unchanged; JGuang-authored acceptance fixtures are explicitly labelled.

• Introduction · EmptyTextarea · upstream native demo
• Minimum height · MinHeightTextarea · upstream native demo
• Maximum height · MaxHeightTextarea · upstream native demo

Actual usage example

Unmodified pinned native demo; copy its required local helper files together.

import TextareaAutosize from '@mui/material/TextareaAutosize';

export default function EmptyTextarea() {
  return (
    <TextareaAutosize
      aria-label="empty textarea"
      placeholder="Empty"
      style={{ width: 200 }}
    />
  );
}

Example dependency boundaries

@mui/material/TextareaAutosize

Direct Icons/System/Utils example imports require their matching 9.4.0 packages. Relative data/helpers are part of the example closure, not extra components. Remote images and simulated operations do not supply a backend.

Pinned upstream API metadata reference

These tables retain the upstream metadata, not a newly inferred generic type system. Conditional generics, inherited props and callback details are defined by the source declarations below. Theme defaults may override metadata defaults.

TextareaAutosize

import TextareaAutosize from '@mui/material/TextareaAutosize';
import { TextareaAutosize } from '@mui/material';

Native source declarations

Declarations/imports are extracted from pinned source without flattening unions or external inheritance. Original English comments/types are source reference, not a claim of translated upstream prose. Shared types stay in their native packages.

vendor/src/TextareaAutosize/TextareaAutosize.tsx

import * as React from 'react';

import PropTypes from 'prop-types';

import debounce from '@mui/utils/debounce';

import useForkRef from '@mui/utils/useForkRef';

import useEnhancedEffect from '@mui/utils/useEnhancedEffect';

import useEventCallback from '@mui/utils/useEventCallback';

import ownerWindow from '@mui/utils/ownerWindow';

import { TextareaAutosizeProps } from './TextareaAutosize.types';

type TextareaStyles = {
  outerHeightStyle: number;
  overflowing: boolean;
};

Post-install acceptance

Run strict types, production build and real interactions. Check keyboard labels/focus, disabled/error/read-only semantics where natively supported, both themes, narrow screens and reduced motion. Verify callbacks against the real host data; do not declare installation complete from copying a prompt. Initialization fixtures also require server HTML and warning-free hydration.

Source and license

https://github.com/mui/material-ui/tree/809a7717b4c050ba3f69b75300689f07c050a16e

MIT · @mui/material@9.4.0. Vendor originals and license are preserved. Full original upstream prose remains in vendor/docs and is not represented as fully translated.