Autosize Textarea

Overview

A textarea that automatically grows and shrinks to fit its content.

This form component is intended for interfaces that need a textarea that automatically grows and shrinks to fit its content, authentication flows, and settings forms. Its implementation is provided as editable source so the final behavior and styling stay inside your project.

Technologies

React

TypeScript

Tailwind CSS

shadcn/ui

No additional package dependency is declared for this component.

@spectrumui/autosize-textarea-demo

Installation

Usage

Max height

@spectrumui/autosize-textarea-max-height

ref

@spectrumui/autosize-textarea-ref

current max height from ref: 0

Form

@spectrumui/autosize-textarea-form

Clear bio after submit.

Bio

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

Customize

This is an example that you can use the hook useAutosizeTextArea() to create your own textarea to match your needs.

In this example, we use react-hook-form and shadcn-ui Textarea to fully control your customize textarea.

@spectrumui/autosize-textarea-customize

Props

Prop	Type	Required	Description
`textAreaRef`	`HTMLTextAreaElement \| null`	Yes	Value accepted by the textAreaRef property in the exported source type.
`minHeight`	`number`	No	Value accepted by the minHeight property in the exported source type.
`maxHeight`	`number`	No	Value accepted by the maxHeight property in the exported source type.
`triggerAutoSize`	`string`	Yes	Value accepted by the triggerAutoSize property in the exported source type.

Use cases

interfaces that need a textarea that automatically grows and shrinks to fit its content
authentication flows
settings forms

Features

Copy-paste source that remains in your repository
TypeScript source included with the component
Tailwind CSS classes editable in the component source
shadcn/ui dependencies: local UI primitives
Spectrum UI registry dependencies: @spectrumui/autosize-textarea-dependecies

Accessibility

Test focus order, keyboard operation, labels, contrast, and screen-reader output in the final application context.

Customization

Edit the Tailwind utility classes in the copied source to match your spacing, color, and typography tokens.
Use the documented className surface for local layout adjustments, then edit the source for structural changes.

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Topic guides

See how this component fits into broader interface patterns, implementation decisions, and working examples.

AI UI Components

Autosize Textarea FAQ

Is Autosize Textarea free to use in commercial projects?

Yes. The public Autosize Textarea source is available under the Apache License 2.0, including for commercial use, subject to the LICENSE terms.

How do I install Autosize Textarea?

Run npx shadcn@latest add @spectrumui/autosize-textarea-demo or npx shadcn@latest add @spectrumui/autosize-textarea-max-height or npx shadcn@latest add @spectrumui/autosize-textarea-ref or npx shadcn@latest add @spectrumui/autosize-textarea-form or npx shadcn@latest add @spectrumui/autosize-textarea-customize. The page also exposes the source for manual installation.

Does Autosize Textarea require Motion?

No Motion dependency was detected in the documented source or registry entry for Autosize Textarea.

Does Autosize Textarea use shadcn/ui or Radix UI?

Autosize Textarea uses local shadcn/ui primitives.

Can I use Autosize Textarea in Next.js?

The documented React source is used in this Next.js application. Keep its use client directive when copying it into the App Router. Install the detected dependencies and verify any application-specific data or image configuration.

What accessibility checks should I run for Autosize Textarea?

No component-specific accessibility mechanism was detected automatically. Test keyboard operation, focus, labels, contrast, and screen-reader output before shipping.