Combobox

Combines a text input with a listbox, allowing users to filter a list of options to items matching a query.

Import

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

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

Features

Exposed to assistive technology as a combobox using the WAI ARIA Combobox design pattern.
Support for single and multiple selection.
Support for disabled options.
Labeling support for accessibility.
Support for description and error message help text linked to the button via ARIA.
Tab stop focus management.
Keyboard support for opening the listbox using the arrow keys, including automatically focusing the first or last item accordingly.
Support for opening the list box when typing, on focus, or manually.
Browser autofill integration via a hidden native <select> element.
Custom localized announcements for option focusing, filtering, and selection using an ARIA live region to work around VoiceOver bugs.
Supports items, and groups of items.
Supports custom placeholder.
Can be controlled or uncontrolled.

Anatomy

The combobox consists of:

Combobox.Root: The root container for a combobox component.
Combobox.Label: The label that gives the user information on the combobox.
Combobox.Description: The description that gives the user more information on the combobox.
Combobox.ErrorMessage: The error message that gives the user information about how to fix a validation error on the combobox.
Combobox.Control: Contains the combobox input and trigger.
Combobox.Input: The input used to filter the combobox options and reflects the selected value.
Combobox.Trigger: The button that opens the combobox.
Combobox.Icon: A small icon often displayed next to the input as a visual affordance for the fact it can be open.
Combobox.Portal: Portals its children into the body when the combobox is open.
Combobox.Content: Contains the content to be rendered when the combobox is open.
Combobox.Arrow: An optional arrow element to render alongside the combobox content.
Combobox.Listbox: Contains a list of items and allows a user to combobox one or more of them.
Combobox.Section: Used to render the label of an option group. It won't be focusable using arrow keys.
Combobox.Item: An item of the combobox.
Combobox.ItemLabel: An accessible label to be announced for the item.
Combobox.ItemDescription: An optional accessible description to be announced for the item.
Combobox.ItemIndicator: The visual indicator rendered when the item is selected.

tsx
<Combobox.Root>
	<Combobox.Label />
	<Combobox.Control>
		<Combobox.Input />
		<Combobox.Trigger>
			<Combobox.Icon />
		</Combobox.Trigger>
	</Combobox.Control>
	<Combobox.Description />
	<Combobox.ErrorMessage />
	<Combobox.Portal>
		<Combobox.Content>
			<Combobox.Arrow />
			<Combobox.Listbox />
		</Combobox.Content>
	</Combobox.Portal>
</Combobox.Root>

tsx
<Combobox.Root>
	<Combobox.Label />
	<Combobox.Control>
		<Combobox.Input />
		<Combobox.Trigger>
			<Combobox.Icon />
		</Combobox.Trigger>
	</Combobox.Control>
	<Combobox.Description />
	<Combobox.ErrorMessage />
	<Combobox.Portal>
		<Combobox.Content>
			<Combobox.Arrow />
			<Combobox.Listbox />
		</Combobox.Content>
	</Combobox.Portal>
</Combobox.Root>

Example

Usage

Filtering options

The defaultFilter prop can be used to customize the way Combobox filter the list of options.

For convenience, we provide 3 built-in filtering mechanism based on substring matches with locale sensitive matching support. It automatically uses the current locale set by the application, either via the default browser language or via the I18nProvider.

startsWith: Show options that starts with the input value.
endsWith: Show options that ends with the input value.
contains: Show options that contains the input value.

A custom filter function can also be passed to the defaultFilter prop, it receives an option and the input value as parameters, and should return a boolean.

tsx
import { Combobox } from "@kobalte/core";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function FilteringExample() {
	return (
		<Combobox.Root options={ALL_OPTIONS} defaultFilter="startsWith">
			//...rest of the component.
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function FilteringExample() {
	return (
		<Combobox.Root options={ALL_OPTIONS} defaultFilter="startsWith">
			//...rest of the component.
		</Combobox.Root>
	);
}

Default value

An initial, uncontrolled value can be provided using the defaultValue prop, which accepts a value corresponding with the options.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function DefaultValueExample() {
	return (
		<Combobox.Root
			defaultValue="Blueberry"
			options={ALL_OPTIONS}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function DefaultValueExample() {
	return (
		<Combobox.Root
			defaultValue="Blueberry"
			options={ALL_OPTIONS}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

Controlled value

The value prop, which accepts a value corresponding with the options prop, can be used to make the value controlled. The onChange event is fired when the user selects an option, and receives the selected option.

Your favorite fruit is: Blueberry.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function ControlledExample() {
	const [value, setValue] = createSignal("Blueberry");
	const onInputChange = (value: string) => {
		// Remove selection when input is cleared.
		if (value === "") {
			setValue("");
		}
	};
	return (
		<>
			<Combobox.Root
				options={ALL_OPTIONS}
				value={value()}
				onChange={setValue}
				onInputChange={onInputChange}
				placeholder="Search a fruit…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.Control aria-label="Fruit">
					<Combobox.Input />
					<Combobox.Trigger>
						<Combobox.Icon>
							<CaretSortIcon />
						</Combobox.Icon>
					</Combobox.Trigger>
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<p>Your favorite fruit is: {value()}.</p>
		</>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function ControlledExample() {
	const [value, setValue] = createSignal("Blueberry");
	const onInputChange = (value: string) => {
		// Remove selection when input is cleared.
		if (value === "") {
			setValue("");
		}
	};
	return (
		<>
			<Combobox.Root
				options={ALL_OPTIONS}
				value={value()}
				onChange={setValue}
				onInputChange={onInputChange}
				placeholder="Search a fruit…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.Control aria-label="Fruit">
					<Combobox.Input />
					<Combobox.Trigger>
						<Combobox.Icon>
							<CaretSortIcon />
						</Combobox.Icon>
					</Combobox.Trigger>
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<p>Your favorite fruit is: {value()}.</p>
		</>
	);
}

Description

The Combobox.Description component can be used to associate additional help text with a combobox.

Choose the fruit you like the most.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function DescriptionExample() {
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Description>Choose the fruit you like the most.</Combobox.Description>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function DescriptionExample() {
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Description>Choose the fruit you like the most.</Combobox.Description>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

Error message

The Combobox.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 combobox 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).

Hmm, I prefer apples.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function ErrorMessageExample() {
	const [value, setValue] = createSignal("Grapes");
	const onInputChange = (value: string) => {
		// Remove selection when input is cleared.
		if (value === "") {
			setValue("");
		}
	};
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			value={value()}
			onChange={setValue}
			onInputChange={onInputChange}
			validationState={value() !== "Apple" ? "invalid" : "valid"}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.ErrorMessage>Hmm, I prefer apples.</Combobox.ErrorMessage>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function ErrorMessageExample() {
	const [value, setValue] = createSignal("Grapes");
	const onInputChange = (value: string) => {
		// Remove selection when input is cleared.
		if (value === "") {
			setValue("");
		}
	};
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			value={value()}
			onChange={setValue}
			onInputChange={onInputChange}
			validationState={value() !== "Apple" ? "invalid" : "valid"}
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.ErrorMessage>Hmm, I prefer apples.</Combobox.ErrorMessage>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

HTML forms

The combobox name prop, paired with the Combobox.HiddenSelect component, can be used for integration with HTML forms.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function HTMLFormExample() {
	const onSubmit = (e: SubmitEvent) => {
		// handle form submission.
	};
	return (
		<form onSubmit={onSubmit}>
			<Combobox.Root
				name="fruit"
				options={ALL_OPTIONS}
				placeholder="Search a fruit…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.HiddenSelect />
				<Combobox.Control aria-label="Fruit">
					<Combobox.Input />
					<Combobox.Trigger>
						<Combobox.Icon>
							<CaretSortIcon />
						</Combobox.Icon>
					</Combobox.Trigger>
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<div>
				<button type="reset">Reset</button>
				<button>Submit</button>
			</div>
		</form>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function HTMLFormExample() {
	const onSubmit = (e: SubmitEvent) => {
		// handle form submission.
	};
	return (
		<form onSubmit={onSubmit}>
			<Combobox.Root
				name="fruit"
				options={ALL_OPTIONS}
				placeholder="Search a fruit…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.HiddenSelect />
				<Combobox.Control aria-label="Fruit">
					<Combobox.Input />
					<Combobox.Trigger>
						<Combobox.Icon>
							<CaretSortIcon />
						</Combobox.Icon>
					</Combobox.Trigger>
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<div>
				<button type="reset">Reset</button>
				<button>Submit</button>
			</div>
		</form>
	);
}

Using object as options

Objects can be used as options instead of plain strings. In this case you have to tell the combobox how it should work with the provided options. For this you have to use the following props:

optionValue: The property name to use as the value of an option (submitted with <form>).
optionTextValue: The property name to use as the text value of an option for filtering and keyboard navigation.
optionLabel: The property name to use as the label of an option, displayed in the combobox input.
optionDisabled: The property name to use as the disabled flag of an option.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
interface Fruit {
	value: string;
	label: string;
	disabled: boolean;
}
const ALL_OPTIONS: Fruit[] = [
	{ value: "apple", label: "Apple", disabled: false },
	{ value: "banana", label: "Banana", disabled: false },
	{ value: "blueberry", label: "Blueberry", disabled: false },
	{ value: "grapes", label: "Grapes", disabled: true },
	{ value: "pineapple", label: "Pineapple", disabled: false },
];
function ObjectExample() {
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			optionValue="value"
			optionTextValue="label"
			optionLabel="label"
			optionDisabled="disabled"
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue.label}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
interface Fruit {
	value: string;
	label: string;
	disabled: boolean;
}
const ALL_OPTIONS: Fruit[] = [
	{ value: "apple", label: "Apple", disabled: false },
	{ value: "banana", label: "Banana", disabled: false },
	{ value: "blueberry", label: "Blueberry", disabled: false },
	{ value: "grapes", label: "Grapes", disabled: true },
	{ value: "pineapple", label: "Pineapple", disabled: false },
];
function ObjectExample() {
	return (
		<Combobox.Root
			options={ALL_OPTIONS}
			optionValue="value"
			optionTextValue="label"
			optionLabel="label"
			optionDisabled="disabled"
			placeholder="Search a fruit…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue.label}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
		>
			<Combobox.Control aria-label="Fruit">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

Using option groups

When using option groups you have to tell the combobox how to distinguish an option from a group. For this you have to use the following props:

optionGroupChildren: The property name that refers to the children options of an option group.

Additionally, the sectionComponent prop is used to display the option group label in the combobox.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
interface Food {
	value: string;
	label: string;
	disabled: boolean;
}
interface Category {
	label: string;
	options: Food[];
}
const ALL_OPTIONS: Category[] = [
	{
		label: "Fruits",
		options: [
			{ value: "apple", label: "Apple", disabled: false },
			{ value: "banana", label: "Banana", disabled: false },
			{ value: "blueberry", label: "Blueberry", disabled: false },
			{ value: "grapes", label: "Grapes", disabled: true },
			{ value: "pineapple", label: "Pineapple", disabled: false },
		],
	},
	{
		label: "Meat",
		options: [
			{ value: "beef", label: "Beef", disabled: false },
			{ value: "chicken", label: "Chicken", disabled: false },
			{ value: "lamb", label: "Lamb", disabled: false },
			{ value: "pork", label: "Pork", disabled: false },
		],
	},
];
export function OptionGroupExample() {
	return (
		<Combobox.Root<Food, Category>
			options={ALL_OPTIONS}
			optionValue="value"
			optionTextValue="label"
			optionLabel="label"
			optionDisabled="disabled"
			optionGroupChildren="options"
			placeholder="Search a food…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue.label}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
			sectionComponent={props => (
				<Combobox.Section>{props.section.rawValue.label}</Combobox.Section>
			)}
		>
			<Combobox.Control aria-label="Food">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
interface Food {
	value: string;
	label: string;
	disabled: boolean;
}
interface Category {
	label: string;
	options: Food[];
}
const ALL_OPTIONS: Category[] = [
	{
		label: "Fruits",
		options: [
			{ value: "apple", label: "Apple", disabled: false },
			{ value: "banana", label: "Banana", disabled: false },
			{ value: "blueberry", label: "Blueberry", disabled: false },
			{ value: "grapes", label: "Grapes", disabled: true },
			{ value: "pineapple", label: "Pineapple", disabled: false },
		],
	},
	{
		label: "Meat",
		options: [
			{ value: "beef", label: "Beef", disabled: false },
			{ value: "chicken", label: "Chicken", disabled: false },
			{ value: "lamb", label: "Lamb", disabled: false },
			{ value: "pork", label: "Pork", disabled: false },
		],
	},
];
export function OptionGroupExample() {
	return (
		<Combobox.Root<Food, Category>
			options={ALL_OPTIONS}
			optionValue="value"
			optionTextValue="label"
			optionLabel="label"
			optionDisabled="disabled"
			optionGroupChildren="options"
			placeholder="Search a food…"
			itemComponent={props => (
				<Combobox.Item item={props.item}>
					<Combobox.ItemLabel>{props.item.rawValue.label}</Combobox.ItemLabel>
					<Combobox.ItemIndicator>
						<CheckIcon />
					</Combobox.ItemIndicator>
				</Combobox.Item>
			)}
			sectionComponent={props => (
				<Combobox.Section>{props.section.rawValue.label}</Combobox.Section>
			)}
		>
			<Combobox.Control aria-label="Food">
				<Combobox.Input />
				<Combobox.Trigger>
					<Combobox.Icon>
						<CaretSortIcon />
					</Combobox.Icon>
				</Combobox.Trigger>
			</Combobox.Control>
			<Combobox.Portal>
				<Combobox.Content>
					<Combobox.Listbox />
				</Combobox.Content>
			</Combobox.Portal>
		</Combobox.Root>
	);
}

Notice the usage of generics on Combobox.Root for proper TypeScript support.

Multiple selection

The multiple prop can be used to create a combobox that allow multi-selection. In this case the value provided to value, defaultValue and onChange props is of type Array<T>.

In this case Combobox.Input can't display the values, instead the Combobox.Control children render prop expose an array of selected options, and two method for removing an option from the selection and clear the selection.

BlueberryGrapes

Your favorite fruits are: Blueberry, Grapes.

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function MultipleSelectionExample() {
	const [values, setValues] = createSignal(["Blueberry", "Grapes"]);
	return (
		<>
			<Combobox.Root<string>
				multiple
				options={ALL_OPTIONS}
				value={values()}
				onChange={setValues}
				placeholder="Search some fruits…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.Control<string> aria-label="Fruits">
					{state => (
						<>
							<div>
								<For each={state.selectedOptions()}>
									{option => (
										<span onPointerDown={e => e.stopPropagation()}>
											{option}
											<button onClick={() => state.remove(option)}>
												<CrossIcon />
											</button>
										</span>
									)}
								</For>
								<Combobox.Input />
							</div>
							<button onPointerDown={e => e.stopPropagation()} onClick={state.clear}>
								<CrossIcon />
							</button>
							<Combobox.Trigger>
								<Combobox.Icon>
									<CaretSortIcon />
								</Combobox.Icon>
							</Combobox.Trigger>
						</>
					)}
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<p>Your favorite fruits are: {values().join(", ")}.</p>
		</>
	);
}

tsx
import { Combobox } from "@kobalte/core";
import { CaretSortIcon, CheckIcon } from "some-icon-library";
import { createSignal } from "solid-js";
const ALL_OPTIONS = ["Apple", "Banana", "Blueberry", "Grapes", "Pineapple"];
function MultipleSelectionExample() {
	const [values, setValues] = createSignal(["Blueberry", "Grapes"]);
	return (
		<>
			<Combobox.Root<string>
				multiple
				options={ALL_OPTIONS}
				value={values()}
				onChange={setValues}
				placeholder="Search some fruits…"
				itemComponent={props => (
					<Combobox.Item item={props.item}>
						<Combobox.ItemLabel>{props.item.rawValue}</Combobox.ItemLabel>
						<Combobox.ItemIndicator>
							<CheckIcon />
						</Combobox.ItemIndicator>
					</Combobox.Item>
				)}
			>
				<Combobox.Control<string> aria-label="Fruits">
					{state => (
						<>
							<div>
								<For each={state.selectedOptions()}>
									{option => (
										<span onPointerDown={e => e.stopPropagation()}>
											{option}
											<button onClick={() => state.remove(option)}>
												<CrossIcon />
											</button>
										</span>
									)}
								</For>
								<Combobox.Input />
							</div>
							<button onPointerDown={e => e.stopPropagation()} onClick={state.clear}>
								<CrossIcon />
							</button>
							<Combobox.Trigger>
								<Combobox.Icon>
									<CaretSortIcon />
								</Combobox.Icon>
							</Combobox.Trigger>
						</>
					)}
				</Combobox.Control>
				<Combobox.Portal>
					<Combobox.Content>
						<Combobox.Listbox />
					</Combobox.Content>
				</Combobox.Portal>
			</Combobox.Root>
			<p>Your favorite fruits are: {values().join(", ")}.</p>
		</>
	);
}

Origin-aware animations

We expose a CSS custom property --kb-combobox-content-transform-origin which can be used to animate the content from its computed origin.

css
/* style.css */
.combobox__content {
	transform-origin: var(--kb-combobox-content-transform-origin);
	animation: contentHide 250ms ease-in forwards;
}
.combobox__content[data-expanded] {
	animation: contentShow 250ms ease-out;
}
@keyframes contentShow {
	from {
		opacity: 0;
		transform: translateY(-8px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}
@keyframes contentHide {
	from {
		opacity: 1;
		transform: translateY(0);
	}
	to {
		opacity: 0;
		transform: translateY(-8px);
	}
}

css
/* style.css */
.combobox__content {
	transform-origin: var(--kb-combobox-content-transform-origin);
	animation: contentHide 250ms ease-in forwards;
}
.combobox__content[data-expanded] {
	animation: contentShow 250ms ease-out;
}
@keyframes contentShow {
	from {
		opacity: 0;
		transform: translateY(-8px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}
@keyframes contentHide {
	from {
		opacity: 1;
		transform: translateY(0);
	}
	to {
		opacity: 0;
		transform: translateY(-8px);
	}
}

API Reference

Combobox.Root

Prop	Description
defaultFilter	`"startsWith" \| "endsWith" \| "contains" \| ((option: Option, inputValue: string) => boolean)` The filter function used to determine if an option should be included in the combo box list.
options	`Array<T \| U>` An array of options to display as the available options.
optionValue	`keyof T \| ((option: T) => string \| number)` Property name or getter function to use as the value of an option. This is the value that will be submitted when the combobox is part of a `<form>`.
optionTextValue	`keyof T \| ((option: T) => string)` Property name or getter function to use as the text value of an option for typeahead purpose.
optionLabel	`keyof T \| ((option: T) => string)` Property name or getter function to use as the label of an option. This is the string representation of the option to display in the `Combobox.Input`.
optionDisabled	`keyof T \| ((option: T) => boolean)` Property name or getter function to use as the disabled flag of an option.
optionGroupChildren	`keyof U` Property name that refers to the children options of an option group.
itemComponent	`Component<ComboboxItemComponentProps<T>>` When NOT virtualized, the component to render as an item in the `Combobox.Listbox`.
sectionComponent	`Component<ComboboxSectionComponentProps<U>>` When NOT virtualized, the component to render as a section in the `Combobox.Listbox`.
multiple	`boolean` Whether the combobox allows multi-selection.
placeholder	`JSX.Element` The content that will be rendered when no value or defaultValue is set.
value	`T \| Array<T>` The controlled value of the combobox.
defaultValue	`T \| Array<T>` The value of the combobox when initially rendered. Useful when you do not need to control the value.
onChange	`(value: T \| Array<T>) => void` Event handler called when the value changes.
open	`boolean` The controlled open state of the combobox.
defaultOpen	`boolean` The default open state when initially rendered. Useful when you do not need to control the open state.
onOpenChange	`(open: boolean, triggerMode?: ComboboxTriggerMode) => void` Event handler called when the open state of the combobox changes. Returns the new open state and the action that caused the opening of the menu.
onInputChange	`(value: string) => void` Handler that is called when the combobox input value changes.
triggerMode	`ComboboxTriggerMode` The interaction required to display the combobox menu, it can be one of the following: - input: open the combobox menu when the user is typing. - focus: open the combobox menu when the input is focused. - manual: open the combobox menu when pressing arrow down/up while focus is on the input or clicking on the trigger.
removeOnBackspace	`boolean` When `multiple` is true, whether the last selected option should be removed when the user press the Backspace key and the input is empty.
allowDuplicateSelectionEvents	`boolean` Whether `onChange` should fire even if the new value is the same as the last.
disallowEmptySelection	`boolean` Whether the combobox allows empty selection or not.
closeOnSelection	`boolean` Whether the combobox closes after selection.
selectionBehavior	`'toggle' \| 'replace'` How selection should behave in the combobox.
virtualized	`boolean` Whether the combobox uses virtual scrolling.
modal	`boolean` Whether the combobox should be the only visible content for screen readers, when set to `true`: - interaction with outside elements will be disabled. - scroll will be locked. - focus will be locked inside the combobox content. - elements outside the combobox content will not be visible for screen readers.
preventScroll	`boolean` Whether the scroll should be locked even if the combobox is not modal.
forceMount	`boolean` Used to force mounting the combobox (portal, positioner and content) when more control is needed. Useful when controlling animation with SolidJS animation libraries.
name	`string` The name of the combobox. Submitted with its owning form as part of a name/value pair.
validationState	`'valid' \| 'invalid'` Whether the combobox should display its "valid" or "invalid" visual styling.
required	`boolean` Whether the user must select an item before the owning form can be submitted.
disabled	`boolean` Whether the combobox is disabled.
readOnly	`boolean` Whether the combobox items can be selected but not changed by the user.
autoComplete	`string` Describes the type of autocomplete functionality the input should provide if any. See MDN
translations	`ComboboxIntlTranslations` Localization strings.

Combobox.Root also accepts the following props to customize the placement of the Combobox.Content.

Prop	Description
placement	`Placement` The placement of the combobox content.
gutter	`number` The distance between the combobox content and the trigger element.
shift	`number` The skidding of the combobox content along the trigger element.
flip	`boolean \| string` Controls the behavior of the combobox content when it overflows the viewport: - If a `boolean`, specifies whether the combobox content should flip to the opposite side when it overflows. - If a `string`, indicates the preferred fallback placements when it overflows. The placements must be spaced-delimited, e.g. "top left".
slide	`boolean` Whether the combobox content should slide when it overflows.
overlap	`boolean` Whether the combobox content can overlap the trigger element when it overflows.
sameWidth	`boolean` Whether the combobox content should have the same width as the trigger element. This will be exposed to CSS as `--kb-popper-anchor-width`.
fitViewport	`boolean` Whether the combobox content should fit the viewport. If this is set to true, the combobox content will have `maxWidth` and `maxHeight` set to the viewport size. This will be exposed to CSS as `--kb-popper-available-width` and `--kb-popper-available-height`.
hideWhenDetached	`boolean` Whether to hide the combobox content when the trigger element becomes occluded.
detachedPadding	`number` The minimum padding in order to consider the trigger element occluded.
arrowPadding	`number` The minimum padding between the arrow and the combobox content corner.
overflowPadding	`number` The minimum padding between the combobox content and the viewport edge. This will be exposed to CSS as `--kb-popper-overflow-padding`.

Data attribute	Description
data-valid	Present when the combobox is valid according to the validation rules.
data-invalid	Present when the combobox is invalid according to the validation rules.
data-required	Present when the user must select an item before the owning form can be submitted.
data-disabled	Present when the combobox is disabled.
data-readonly	Present when the combobox is read only.

Combobox.Label, Combobox.Control, Combobox.Input, Combobox.Trigger, Combobox.Description and Combobox.ErrorMesssage shares the same data-attributes.

Combobox.Control

Render Prop	Description
selectedOptions	`Accessor<T[]>` An array of selected options.
remove	`(option: T) => void` A function to remove an option from the selection.
clear	`() => void` A function to clear the selection.

Combobox.Trigger

Combobox.Trigger consists of Button.

Data attribute	Description
data-expanded	Present when the combobox is open.
data-closed	Present when the combobox is close.

Combobox.Icon

Data attribute	Description
data-expanded	Present when the combobox is open.
data-closed	Present when the combobox is close.

Combobox.ErrorMessage

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

Combobox.Content

Data attribute	Description
data-expanded	Present when the combobox is open.
data-closed	Present when the combobox is close.

Combobox.Arrow

Prop	Description
size	`number` The size of the arrow.

Combobox.Listbox

Prop	Description
scrollRef	`Accessor<HTMLElement \| undefined>` The ref attached to the scrollable element, used to provide automatic scrolling on item focus. If not provided, defaults to the listbox.
scrollToItem	`(key: string) => void` When virtualized, the Virtualizer function used to scroll to the item of the given key.
children	`(items: Accessor<Collection<CollectionNode<T \| U>>>) => JSX.Element` When virtualized, a map function that receives an items signal representing all items and sections.

Combobox.Item

Prop	Description
item	`CollectionNode` The collection node to render.

Data attribute	Description
data-disabled	Present when the item is disabled.
data-selected	Present when the item is selected.
data-highlighted	Present when the item is highlighted.

Combobox.ItemLabel, Combobox.ItemDescription and Combobox.ItemIndicator shares the same data-attributes.

Combobox.ItemIndicator

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
`Combobox.Root`	`div`
`Combobox.Label`	`span`
`Combobox.Description`	`div`
`Combobox.ErrorMessage`	`div`
`Combobox.Control`	`div`
`Combobox.Input`	`input`
`Combobox.Trigger`	`button`
`Combobox.Icon`	`span`
`Combobox.Portal`	`Portal`
`Combobox.Content`	`div`
`Combobox.Arrow`	`div`
`Combobox.Listbox`	`ul`
`Combobox.Section`	`li`
`Combobox.Item`	`li`
`Combobox.ItemLabel`	`div`
`Combobox.ItemDescription`	`div`
`Combobox.ItemIndicator`	`div`

Accessibility

Keyboard Interactions

Key	Description
`Enter`	When focus is virtualy on an item, selects the focused item.
`ArrowDown`	When focus is on the input, opens the combobox and virtual focuses the first or selected item. When focus is virtualy on an item, moves virtual focus to the next item.
`ArrowUp`	When focus is on the input, opens the combebox and virtual focuses the last or selected item. When focus is virtualy on an item, moves virtual focus to the previous item.
`Alt` + `ArrowDown`	When focus is on the input, opens the combobox.
`Alt` + `ArrowUp`	When focus is on the input, closes the combobox.
`Home`	When focus is on the input, moves virtual focus to first item.
`End`	When focus is on the input, moves virtual focus to last item.
`Esc`	When the combobox is open, closes the combobox. When the combobox is closed, clear the input and selection.