Checkbox

A control that allows the user to toggle between checked and not checked.

Import

ts
import { Checkbox } from "@kobalte/core";

ts
import { Checkbox } from "@kobalte/core";

Features

Built with a native HTML <input> element, which is visually hidden to allow custom styling.
Syncs with form reset events.
Labeling support for assistive technology.
Support for description and error message help text linked to the input via ARIA.
Can be controlled or uncontrolled.

Anatomy

The checkbox consists of:

Checkbox.Root: The root container for a checkbox.
Checkbox.Input: The native html input that is visually hidden in the checkbox.
Checkbox.Control: The element that visually represents a checkbox.
Checkbox.Indicator: The visual indicator rendered when the checkbox is in a checked or indeterminate state.
Checkbox.Label: The label that gives the user information on the checkbox.
Checkbox.Description: The description that gives the user more information on the checkbox.
Checkbox.ErrorMessage: The error message that gives the user information about how to fix a validation error on the checkbox.

tsx
<Checkbox.Root>
	<Checkbox.Input />
	<Checkbox.Control>
		<Checkbox.Indicator />
	</Checkbox.Control>
	<Checkbox.Label />
	<Checkbox.Description />
	<Checkbox.ErrorMessage />
</Checkbox.Root>

tsx
<Checkbox.Root>
	<Checkbox.Input />
	<Checkbox.Control>
		<Checkbox.Indicator />
	</Checkbox.Control>
	<Checkbox.Label />
	<Checkbox.Description />
	<Checkbox.ErrorMessage />
</Checkbox.Root>

Example

Usage

Default checked

An initial, uncontrolled value can be provided using the defaultChecked prop.

tsx
<Checkbox.Root defaultChecked>...</Checkbox.Root>

tsx
<Checkbox.Root defaultChecked>...</Checkbox.Root>

Controlled checked

The checked prop can be used to make the checked state controlled. The onChange event is fired when the user presses the checkbox, and receives the new value.

You are unsubscribed.

tsx
import { createSignal } from "solid-js";
function ControlledExample() {
	const [checked, setChecked] = createSignal(false);
	return (
		<>
			<Checkbox.Root checked={checked()} onChange={setChecked}>
				...
			</Checkbox.Root>
			<p>You are {checked() ? "subscribed" : "unsubscribed"}.</p>
		</>
	);
}

tsx
import { createSignal } from "solid-js";
function ControlledExample() {
	const [checked, setChecked] = createSignal(false);
	return (
		<>
			<Checkbox.Root checked={checked()} onChange={setChecked}>
				...
			</Checkbox.Root>
			<p>You are {checked() ? "subscribed" : "unsubscribed"}.</p>
		</>
	);
}

Description

The Checkbox.Description component can be used to associate additional help text with a checkbox.

You will receive our weekly newsletter.

tsx
<Checkbox.Root>
	<Checkbox.Input />
	<Checkbox.Control>
		<Checkbox.Indicator>
			<CheckIcon />
		</Checkbox.Indicator>
	</Checkbox.Control>
	<Checkbox.Label>Subscribe</Checkbox.Label>
	<Checkbox.Description>You will receive our weekly newsletter.</Checkbox.Description>
</Checkbox.Root>

tsx
<Checkbox.Root>
	<Checkbox.Input />
	<Checkbox.Control>
		<Checkbox.Indicator>
			<CheckIcon />
		</Checkbox.Indicator>
	</Checkbox.Control>
	<Checkbox.Label>Subscribe</Checkbox.Label>
	<Checkbox.Description>You will receive our weekly newsletter.</Checkbox.Description>
</Checkbox.Root>

Error message

The Checkbox.ErrorMessage component can be used to help the user fix a validation error. It should be combined with the validationState prop to semantically mark the checkbox as invalid for assistive technologies.

By default, it will render only when the validationState prop is set to invalid, use the forceMount prop to always render the error message (ex: for usage with animation libraries).

You must agree to our Terms and Conditions.

tsx
import { createSignal } from "solid-js";
function ErrorMessageExample() {
	const [checked, setChecked] = createSignal(false);
	return (
		<Checkbox.Root
			checked={checked()}
			onChange={setChecked}
			validationState={!checked() ? "invalid" : "valid"}
		>
			<Checkbox.Input />
			<Checkbox.Control>
				<Checkbox.Indicator>
					<CheckIcon />
				</Checkbox.Indicator>
			</Checkbox.Control>
			<Checkbox.Label>Agree</Checkbox.Label>
			<Checkbox.ErrorMessage>You must agree to our Terms and Conditions.</Checkbox.ErrorMessage>
		</Checkbox.Root>
	);
}

tsx
import { createSignal } from "solid-js";
function ErrorMessageExample() {
	const [checked, setChecked] = createSignal(false);
	return (
		<Checkbox.Root
			checked={checked()}
			onChange={setChecked}
			validationState={!checked() ? "invalid" : "valid"}
		>
			<Checkbox.Input />
			<Checkbox.Control>
				<Checkbox.Indicator>
					<CheckIcon />
				</Checkbox.Indicator>
			</Checkbox.Control>
			<Checkbox.Label>Agree</Checkbox.Label>
			<Checkbox.ErrorMessage>You must agree to our Terms and Conditions.</Checkbox.ErrorMessage>
		</Checkbox.Root>
	);
}

HTML forms

The name and value props can be used for integration with HTML forms.

tsx
function HTMLFormExample() {
	const onSubmit = (e: SubmitEvent) => {
		// handle form submission.
	};
	return (
		<form onSubmit={onSubmit}>
			<Checkbox.Root name="newsletter" value="subscribe">
				...
			</Checkbox.Root>
			<div>
				<button type="reset">Reset</button>
				<button type="submit">Submit</button>
			</div>
		</form>
	);
}

tsx
function HTMLFormExample() {
	const onSubmit = (e: SubmitEvent) => {
		// handle form submission.
	};
	return (
		<form onSubmit={onSubmit}>
			<Checkbox.Root name="newsletter" value="subscribe">
				...
			</Checkbox.Root>
			<div>
				<button type="reset">Reset</button>
				<button type="submit">Submit</button>
			</div>
		</form>
	);
}

API Reference

Checkbox.Root

Prop	Description
checked	`boolean` The controlled checked state of the checkbox.
defaultChecked	`boolean` The default checked state when initially rendered. Useful when you do not need to control the checked state.
onChange	`(checked: boolean) => void` Event handler called when the checked state of the checkbox changes.
indeterminate	`boolean` Whether the checkbox is in an indeterminate state.
name	`string` The name of the checkbox, used when submitting an HTML form. See MDN.
value	`string` The value of the checkbox, used when submitting an HTML form. See MDN.
validationState	`'valid' \| 'invalid'` Whether the checkbox should display its "valid" or "invalid" visual styling.
required	`boolean` Whether the user must check the checkbox before the owning form can be submitted.
disabled	`boolean` Whether the checkbox is disabled.
readOnly	`boolean` Whether the checkbox can be checked but not changed by the user.
children	`JSX.Element \| (state: CheckboxState) => JSX.Element` The children of the checkbox. Can be a `JSX.Element` or a render prop for having access to the internal state.

Render Prop	Description
checked	`Accessor<boolean>` Whether the checkbox is checked or not.
indeterminate	`Accessor<boolean>` Whether the checkbox is in an indeterminate state.

Data attribute	Description
data-valid	Present when the checkbox is valid according to the validation rules.
data-invalid	Present when the checkbox is invalid according to the validation rules.
data-required	Present when the checkbox is required.
data-disabled	Present when the checkbox is disabled.
data-readonly	Present when the checkbox is read only.
data-checked	Present when the checkbox is checked.
data-indeterminate	Present when the checkbox is in an indeterminate state.

Checkbox.Input, Checkbox.Control, Checkbox.Indicator, Checkbox.Label, Checkbox.Description and Checkbox.ErrorMessage share the same data-attributes.

Checkbox.Indicator

Prop	Description
forceMount	`boolean` Used to force mounting when more control is needed. Useful when controlling animation with SolidJS animation libraries.

Checkbox.ErrorMessage

Prop	Description
forceMount	`boolean` Used to force mounting when more control is needed. Useful when controlling animation with SolidJS animation libraries.

Rendered elements

Component	Default rendered element
`Checkbox.Root`	`div`
`Checkbox.Input`	`input`
`Checkbox.Control`	`div`
`Checkbox.Indicator`	`div`
`Checkbox.Label`	`label`
`Checkbox.Description`	`div`
`Checkbox.ErrorMessage`	`div`

Accessibility

Keyboard Interactions

Key	Description
`Space`	Toggles the checkbox on and off.