Primitives

Textarea

Multiline text field with CSS-first auto-growth.

System promptThe box grows as you type — try adding a few lines.

Composition

Multiline input

<Textarea />

Installation

First install and activate one skin. Core deliberately contains no visual token defaults.

The Control UI source installs this primitive from src/registry/sources/control-ui/ui/textarea.tsx.

Registry command

npx shadcn@latest add https://control-ui.dev/r/textarea.json

See registry manifest

Raw code

Primary installed source

src/registry/sources/control-ui/ui/textarea.tsx

"use client";

import { Input as InputPrimitive } from "@base-ui/react/input";

import type { ComponentProps, CSSProperties } from "react";

import type { FieldKnobStyle } from "@/components/control-ui/knob-contracts/field-knobs";

import { cn } from "@/components/control-ui/lib/cn";

export type TextareaProps = Omit<ComponentProps<"textarea">, "style"> & { style?: CSSProperties & FieldKnobStyle };

// `field-sizing-content` auto-grows it, so there is no ResizeObserver and no JS measuring.

export function Textarea({ ref, id, name, value, defaultValue, disabled, autoFocus, className, ...props }: TextareaProps) {

return (

<InputPrimitive

ref={ref}

id={id}

name={name}

value={value}

defaultValue={defaultValue}

disabled={disabled}

autoFocus={autoFocus}

render={

<textarea

{...props}

data-control-ui="textarea"

data-field-kind="textarea"

data-slot="root"

data-control-family="field"

data-control="true"

className={cn("field-sizing-content w-full min-w-0 resize-none", className)}

/>

}

/>

);

}

Knobs

Typed custom properties the recipe paints with. Set one on the root — style, a utility class, or a skin — and every slot inherits it.

--cui-field-* · 15 knobsHow the cascade resolves

--cui-field-radius<length-percentage>var(--nest-radius, var(--radius-control))

--cui-field-background<color>var(--control-fill)

--cui-field-hover-background<color>var(--hover-fill)

--cui-field-affordance-background<color>transparent

--cui-field-affordance-shadow*0 0 transparent

--cui-field-affordance-foreground<color>var(--muted-foreground)

--cui-field-affordance-hover-background<color>var(--hover-fill)

--cui-field-foreground<color>var(--foreground)

--cui-field-border-color<color>var(--control-rim)

--cui-field-border-width<length>var(--control-rim-width)

--cui-field-shadow*var(--shadow-inset)

--cui-field-backdrop-filter*blur(0px)

--cui-field-height<length-percentage>var(--control-h-md)

--cui-field-padding-inline<length-percentage>var(--padding-x)

--cui-field-font-size<length-percentage>var(--text-body)