Textarea Readonly

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import type { ReactNode, TextareaHTMLAttributes } from "react";
import { useId } from "react";

function cx(...parts: Array<string | false | null | undefined>): string {
  return parts.filter(Boolean).join(" ");
}

const TEXTAREA_BASE =
  "w-full min-h-[80px] resize-y rounded-[var(--ds-radius-sm)] border bg-[var(--ds-color-input)] px-3 py-2 text-sm leading-5 text-[var(--ds-color-foreground)] shadow-none transition-colors duration-150 ease-out placeholder:text-[var(--ds-color-muted-foreground)] hover:bg-[var(--ds-color-input-hover,var(--ds-color-input))] focus:bg-[var(--ds-color-input-focus,var(--ds-color-input))] focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--ds-color-focus-ring)] disabled:pointer-events-none disabled:bg-[var(--ds-color-muted)] disabled:text-[var(--ds-color-muted-foreground)] disabled:opacity-60 read-only:bg-[var(--ds-color-surface-subtle)] read-only:text-[var(--ds-color-muted-foreground)] motion-reduce:transition-none";

const TEXTAREA_BORDER =
  "border-[var(--ds-color-border)] focus:border-[var(--ds-color-border-strong)]";

export interface TextareaReadonlyProps extends TextareaHTMLAttributes<HTMLTextAreaElement> {
  /** Visible label; omit and pass `aria-label` for a bare control. */
  label?: ReactNode;
}

/**
 * Read-only textarea. Uses the real native `readOnly` attribute (defaulted
 * to `true`): the value cannot be edited but the control stays focusable,
 * its text stays selectable and copyable, and its value IS submitted with
 * the form — unlike `disabled`, which blocks all of that. The readonly
 * treatment (subtle surface, muted text) comes from the native
 * `:read-only` pseudo-class. Use it for values the user may inspect or
 * copy but not change (a generated summary, an audit trail, a locked
 * message draft).
 */
export function TextareaReadonly({ label, id, className, rows = 3, readOnly = true, ...props }: TextareaReadonlyProps) {
  const generatedId = useId();
  const textareaId = id ?? `textarea-${generatedId}`;

  const control = (
    <textarea
      id={textareaId}
      rows={rows}
      readOnly={readOnly}
      className={cx(TEXTAREA_BASE, TEXTAREA_BORDER, className)}
      {...props}
    />
  );

  if (label === undefined || label === null) {
    return control;
  }

  return (
    <div className="w-full">
      <label
        htmlFor={textareaId}
        className="mb-2 block text-[13px] font-medium leading-5 text-[var(--ds-color-foreground)]"
      >
        {label}
      </label>
      {control}
    </div>
  );
}

export default TextareaReadonly;

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/* DevSnips React — JavaScript parity build.
 * Same API, behavior, and classes as code.tsx; TypeScript types removed.
 * Regenerated from code.tsx — edit code.tsx and re-run the generator.
 */

import { useId } from "react";
function cx(...parts) {
  return parts.filter(Boolean).join(" ");
}
const TEXTAREA_BASE = "w-full min-h-[80px] resize-y rounded-[var(--ds-radius-sm)] border bg-[var(--ds-color-input)] px-3 py-2 text-sm leading-5 text-[var(--ds-color-foreground)] shadow-none transition-colors duration-150 ease-out placeholder:text-[var(--ds-color-muted-foreground)] hover:bg-[var(--ds-color-input-hover,var(--ds-color-input))] focus:bg-[var(--ds-color-input-focus,var(--ds-color-input))] focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--ds-color-focus-ring)] disabled:pointer-events-none disabled:bg-[var(--ds-color-muted)] disabled:text-[var(--ds-color-muted-foreground)] disabled:opacity-60 read-only:bg-[var(--ds-color-surface-subtle)] read-only:text-[var(--ds-color-muted-foreground)] motion-reduce:transition-none";
const TEXTAREA_BORDER = "border-[var(--ds-color-border)] focus:border-[var(--ds-color-border-strong)]";
export function TextareaReadonly({ label, id, className, rows = 3, readOnly = true, ...props }) {
  const generatedId = useId();
  const textareaId = id ?? `textarea-${generatedId}`;
  const control = <textarea
    id={textareaId}
    rows={rows}
    readOnly={readOnly}
    className={cx(TEXTAREA_BASE, TEXTAREA_BORDER, className)}
    {...props}
  />;
  if (label === undefined || label === null) {
    return control;
  }
  return <div className="w-full">
      <label
    htmlFor={textareaId}
    className="mb-2 block text-[13px] font-medium leading-5 text-[var(--ds-color-foreground)]"
  >
        {label}
      </label>
      {control}
    </div>;
}

export default TextareaReadonly;

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# Textarea Readonly

Read-only textarea using the real native readOnly attribute — focusable, selectable, submitted.

## Usage

```tsx
<TextareaReadonly label="Generated summary" value={summary} rows={4} />
```

## JavaScript

A `code.jsx` build is provided for projects that ship plain JSX. It exposes the same API and behavior as `code.tsx` — only the TypeScript types are removed.

```jsx
<TextareaReadonly label="Generated summary" value={summary} rows={4} />
```

## Props

| Name | Type | Default | Description |
|---|---|---:|---|
| `label` | `ReactNode` | — | Visible label (omit and pass `aria-label` for a bare control). |
| `value` / `defaultValue` | `string` | — | Controlled / uncontrolled value. |
| `onChange` | `(event) => void` | — | Native change callback. |
| `rows` | `number` | `3` | Visible rows — the natural height floor (with `min-h-[80px]`). |
| `placeholder` | `string` | — | Muted placeholder (never critical information). |
| `disabled` | `boolean` | — | Native disabled — not focusable, not submitted. |
| `readOnly` | `boolean` | `true` | Native read-only — focusable, selectable, submitted. |
| `required` / `name` / `id` | `boolean` / `string` | — | Native form semantics (`id` also the label `htmlFor`). |
| `minLength` / `maxLength` | `number` | — | Native length constraints. |
| `className` | `string` | — | Extra Tailwind classes merged onto the control. |
| other native props / `aria-*` | — | — | Passed through to the `<textarea>`. |

## States

Native textarea with `readOnly` defaulted to `true`. The value cannot be edited, but the control stays in the tab order, its text stays selectable and copyable, and its value IS submitted with the form. The subtle surface + muted text come from the `:read-only` pseudo-class — visually distinct from the muted `disabled` treatment. Pass `readOnly={false}` to flip it back.

## Accessibility

Real `readOnly` attribute — screen readers announce the field as read-only while it remains focusable, so the content is reachable and reviewable by keyboard users (unlike `disabled`, which is skipped). Visible `focus-visible` ring still applies.

## Styling

Built with React, Tailwind CSS, and DevSnips design tokens. The component consumes the `--ds-*` semantic tokens via arbitrary values (for example `bg-[var(--ds-color-input)]`). Define the tokens once in your theme — no component-specific CSS file is required.

## Design Tokens

See [React/DESIGN_TOKENS.md](../../../DESIGN_TOKENS.md) for the authoritative token specification. This textarea uses the semantic color, radius, spacing, and motion tokens.

## Notes

Use read-only for values the user may inspect or copy but not change: a generated summary, an audit-trail entry, the rendered version of a template. Disabled and read-only are different states — this variant exists to keep that distinction honest.