Textarea

npm install react-aria-components

"use client";

import { FieldError, Label, Text, TextArea, TextField, type TextFieldProps } from "react-aria-components";

const styles = {
  root: "group flex flex-col gap-(--tui-textarea-gap) font-(family-name:--tui-font) data-disabled:opacity-(--tui-textarea-disabled-opacity)",
  // One soft box with the label inside. It has no handle to drag: it grows as more is written.
  box: "flex min-h-(--tui-textarea-min-height) flex-col gap-1.5 rounded-(--tui-textarea-radius) bg-(--tui-textarea-bg) px-(--tui-textarea-padding-x) py-(--tui-textarea-padding-y) transition-[background-color,box-shadow] duration-(--tui-duration) ease-out focus-within:bg-(--tui-textarea-bg-focus) focus-within:[box-shadow:0_0_0_var(--tui-textarea-ring-width)_var(--tui-textarea-ring)] hover:bg-(--tui-textarea-bg-hover) focus-within:hover:bg-(--tui-textarea-bg-focus) group-data-invalid:[box-shadow:0_0_0_var(--tui-textarea-ring-width)_var(--tui-textarea-error)]",
  label: "text-(length:--tui-textarea-label-size) leading-none font-(--tui-textarea-label-weight) text-(--tui-textarea-label)",
  input:
    "block w-full min-w-0 flex-1 resize-none border-none bg-transparent p-0 font-(family-name:--tui-font) text-(length:--tui-textarea-font-size) leading-normal text-(--tui-textarea-fg) outline-none [field-sizing:content] placeholder:text-(--tui-textarea-placeholder)",
  hint: "px-(--tui-textarea-padding-x) text-(length:--tui-textarea-hint-size) leading-normal text-(--tui-textarea-hint)",
  error: "px-(--tui-textarea-padding-x) text-(length:--tui-textarea-hint-size) leading-normal text-(--tui-textarea-error)",
};

export interface TextareaProps extends Omit<TextFieldProps, "className" | "children"> {
  label?: string;
  description?: string;
  errorMessage?: string;
  placeholder?: string;
  /** The fewest lines it shows. It grows past them as more is written. */
  rows?: number;
  className?: string;
}

export function Textarea({ label, description, errorMessage, placeholder, rows = 3, className, ...props }: TextareaProps) {
  return (
    <TextField {...props} className={[styles.root, className].filter(Boolean).join(" ")}>
      <div data-slot="textarea" className={styles.box}>
        {label && <Label className={styles.label}>{label}</Label>}
        <TextArea placeholder={placeholder} rows={rows} className={styles.input} />
      </div>
      {description && (
        <Text slot="description" className={styles.hint}>
          {description}
        </Text>
      )}
      <FieldError className={styles.error}>{errorMessage}</FieldError>
    </TextField>
  );
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Textarea */
  --tui-textarea-min-height: calc(var(--tui-space) * 24);
  --tui-textarea-padding-x: calc(var(--tui-space) * 4);
  --tui-textarea-padding-y: calc(var(--tui-space) * 3.5);
  --tui-textarea-gap: calc(var(--tui-space) * 2);
  --tui-textarea-radius: calc(var(--tui-radius) * 2);
  --tui-textarea-font-size: calc(var(--tui-text) + 1px);
  --tui-textarea-label-size: calc(var(--tui-text) - 2px);
  --tui-textarea-label-weight: 500;
  --tui-textarea-hint-size: calc(var(--tui-text) - 2px);
  --tui-textarea-bg: color-mix(in srgb, var(--tui-bg) 95%, var(--tui-fg));
  --tui-textarea-fg: var(--tui-fg);
  --tui-textarea-label: var(--tui-muted-fg);
  --tui-textarea-placeholder: color-mix(in srgb, var(--tui-muted-fg) 65%, transparent);
  --tui-textarea-hint: var(--tui-muted-fg);
  --tui-textarea-bg-hover: color-mix(in srgb, var(--tui-bg) 92%, var(--tui-fg));
  --tui-textarea-bg-focus: color-mix(in srgb, var(--tui-bg) 96%, var(--tui-fg));
  --tui-textarea-ring: var(--tui-fg);
  --tui-textarea-ring-width: 2px;
  --tui-textarea-error: var(--tui-danger);
  --tui-textarea-disabled-opacity: 0.5;
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}