Textarea — logic2b/ui

import { Textarea } from "@/components/ui/textarea"

export default function TextareaDemo() {
  return <Textarea placeholder="Type your message here." />
}

Installation

npx logic2b@latest add textarea

Working with an AI assistant? Copy this prompt into Claude Code, Cursor or Copilot — it carries the install steps, a no-CLI fallback and a verification checklist.

Add the "textarea" item from the logic2b ui registry (https://ui.logic2b.com) to this project. Follow every step and verify at the end.

## Steps

1. If the project has no `components.json` yet, set up logic2b ui first:

   ```bash
   npx logic2b@latest init
   ```

2. Install the item (the CLI resolves registry dependencies automatically):

   ```bash
   npx logic2b@latest add textarea
   ```

3. Install any npm dependencies the command prints.

## If the CLI is not available

Do it manually from the registry payload:

1. Fetch https://ui.logic2b.com/r/textarea.json.
2. Write every entry in `files[]` to its mapped project path (see below).
3. Repeat (recursively) for each name in `registryDependencies`.
4. Install every package listed in `dependencies` across those payloads.

## Registry reference

- Index of every item: https://ui.logic2b.com/r/index.json
- Item payload (full source): https://ui.logic2b.com/r/<name>.json
- Usage examples per item: https://ui.logic2b.com/r/demos/index.json → https://ui.logic2b.com/r/demos/<demo>.json
- Docs index for agents: https://ui.logic2b.com/llms.txt (full docs: https://ui.logic2b.com/llms-full.txt)
- Every docs page is Markdown when you append `.md` to its URL.

Registry file paths map to project paths like this:
- `ui/*` → `@/components/ui/*`
- `blocks/<name>/*` → `@/components/*`
- `charts/*` → `@/components/charts/*`
- `hooks/*` → `@/hooks/*`
- `lib/utils.ts` → `@/lib/utils.ts`
- `theme.css` → next to the project's Tailwind entry stylesheet

## Conventions (do not break these)

- Tailwind CSS v4 (CSS-first config; no tailwind.config.js needed) and React 19.
- All colors go through semantic tokens (`bg-primary`, `text-muted-foreground`,
  `border-border`, …). Never hardcode hex/oklch values in components.
- Dark mode is class-based: toggle `.dark` on `<html>`.
- Icons come from lucide-react.

## Verify before finishing

1. The dev server starts and the app renders without console errors.
2. TypeScript compiles (`tsc --noEmit` or the framework's check).
3. Components use the theme: a `<Button>` shows the primary token color,
   and toggling `.dark` on `<html>` switches the palette.

Copy into ui/textarea.tsx:

import * as React from "react"

import { cn } from "@/lib/utils"

function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
  return (
    <textarea
      data-slot="textarea"
      className={cn(
        "border-input placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive flex field-sizing-content min-h-16 w-full rounded-md border bg-transparent px-3 py-2 text-base shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
        className
      )}
      {...props}
    />
  )
}

export { Textarea }

Usage

import { Textarea } from "@/components/ui/textarea"

<Textarea placeholder="Type your message here." />

API

Textarea renders a native <textarea> and forwards every prop it accepts. It auto-sizes to its content (field-sizing-content) and styles aria-invalid for validation states.

Prop	Type	Default
`placeholder`	`string`	—
`value` / `defaultValue`	`string`	—
`disabled`	`boolean`	`false`
`rows`	`number`	—
`className`	`string`	—
`...props`	`React.ComponentProps<"textarea">`	—

Examples

With label

Your message

Your message will be copied to the support team.

import { Label } from "@/components/ui/label"
import { Textarea } from "@/components/ui/textarea"

export default function TextareaLabelDemo() {
  return (
    <div className="grid w-[360px] gap-2">
      <Label htmlFor="message">Your message</Label>
      <Textarea id="message" placeholder="Type your message here." />
      <p className="text-muted-foreground text-sm">
        Your message will be copied to the support team.
      </p>
    </div>
  )
}

Disabled

import { Textarea } from "@/components/ui/textarea"

export default function TextareaDisabledDemo() {
  return (
    <Textarea
      disabled
      placeholder="Type your message here."
      className="w-[360px]"
    />
  )
}

With a button

import { Button } from "@/components/ui/button"
import { Label } from "@/components/ui/label"
import { Textarea } from "@/components/ui/textarea"

export default function TextareaFormDemo() {
  return (
    <form
      className="grid w-[360px] gap-3"
      onSubmit={(event) => event.preventDefault()}
    >
      <Label htmlFor="feedback">Feedback</Label>
      <Textarea id="feedback" placeholder="Tell us what you think..." />
      <Button type="submit" className="justify-self-start">
        Send feedback
      </Button>
    </form>
  )
}