Combobox

An input combined with a list of predefined items to select.

Choose a fruit

'use client';
import * as React from 'react';
import { Combobox } from '@base-ui-components/react/combobox';
import styles from './index.module.css';

export default function ExampleCombobox() {
  const id = React.useId();
  return (
    <Combobox.Root items={fruits}>
      <div className={styles.Label}>
        <label htmlFor={id}>Choose a fruit</label>
        <div className={styles.InputWrapper}>
          <Combobox.Input placeholder="e.g. Apple" id={id} className={styles.Input} />
          <div className={styles.ActionButtons}>
            <Combobox.Clear className={styles.Clear} aria-label="Clear selection">
              <ClearIcon className={styles.ClearIcon} />
            </Combobox.Clear>
            <Combobox.Trigger className={styles.Trigger} aria-label="Open popup">
              <ChevronDownIcon className={styles.TriggerIcon} />
            </Combobox.Trigger>
          </div>
        </div>
      </div>

      <Combobox.Portal>
        <Combobox.Positioner className={styles.Positioner} sideOffset={4}>
          <Combobox.Popup className={styles.Popup}>
            <Combobox.Empty className={styles.Empty}>No fruits found.</Combobox.Empty>
            <Combobox.List className={styles.List}>
              {(item: string) => (
                <Combobox.Item key={item} value={item} className={styles.Item}>
                  <Combobox.ItemIndicator className={styles.ItemIndicator}>
                    <CheckIcon className={styles.ItemIndicatorIcon} />
                  </Combobox.ItemIndicator>
                  <div className={styles.ItemText}>{item}</div>
                </Combobox.Item>
              )}
            </Combobox.List>
          </Combobox.Popup>
        </Combobox.Positioner>
      </Combobox.Portal>
    </Combobox.Root>
  );
}

function CheckIcon(props: React.ComponentProps<'svg'>) {
  return (
    <svg fill="currentcolor" width="10" height="10" viewBox="0 0 10 10" {...props}>
      <path d="M9.1603 1.12218C9.50684 1.34873 9.60427 1.81354 9.37792 2.16038L5.13603 8.66012C5.01614 8.8438 4.82192 8.96576 4.60451 8.99384C4.3871 9.02194 4.1683 8.95335 4.00574 8.80615L1.24664 6.30769C0.939709 6.02975 0.916013 5.55541 1.19372 5.24822C1.47142 4.94102 1.94536 4.91731 2.2523 5.19524L4.36085 7.10461L8.12299 1.33999C8.34934 0.993152 8.81376 0.895638 9.1603 1.12218Z" />
    </svg>
  );
}

function ClearIcon(props: React.ComponentProps<'svg'>) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      {...props}
    >
      <path d="M18 6L6 18" />
      <path d="M6 6l12 12" />
    </svg>
  );
}

function ChevronDownIcon(props: React.ComponentProps<'svg'>) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      {...props}
    >
      <path d="M6 9l6 6 6-6" />
    </svg>
  );
}

const fruits = [
  'Apple',
  'Banana',
  'Orange',
  'Pineapple',
  'Grape',
  'Mango',
  'Strawberry',
  'Blueberry',
  'Raspberry',
  'Blackberry',
  'Cherry',
  'Peach',
  'Pear',
  'Plum',
  'Kiwi',
  'Watermelon',
  'Cantaloupe',
  'Honeydew',
  'Papaya',
  'Guava',
  'Lychee',
  'Pomegranate',
  'Apricot',
  'Grapefruit',
  'Passionfruit',
];

Usage guidelines

Combobox is a filterable Select: Use Combobox when the input is restricted to a set of predefined selectable items, similar to Select but whose items are filterable using an input. Prefer using Combobox over Select when the number of items is sufficiently large to warrant filtering.
Avoid for simple search widgets: Combobox does not allow free-form text input. For search widgets, consider using Autocomplete instead.
Form controls must have an accessible name: The input must have a meaningful label. Prefer using <Field> to provide a visible text label and description, or use the aria-label attribute as an alternative. See the forms guide for more on building form controls.

Anatomy

Import the components and place them together:

Anatomy

import { Combobox } from '@base-ui-components/react/combobox';

<Combobox.Root>
  <Combobox.Input />
  <Combobox.Trigger />
  <Combobox.Icon />
  <Combobox.Clear />
  <Combobox.Value />

  <Combobox.Chips>
    <Combobox.Chip>
      <Combobox.ChipRemove />
    </Combobox.Chip>
  </Combobox.Chips>

  <Combobox.Portal>
    <Combobox.Backdrop />
    <Combobox.Positioner>
      <Combobox.Popup>
        <Combobox.Arrow />

        <Combobox.Status />
        <Combobox.Empty />

        <Combobox.List>
          <Combobox.Row>
            <Combobox.Item>
              <Combobox.ItemIndicator />
            </Combobox.Item>
          </Combobox.Row>

          <Combobox.Separator />

          <Combobox.Group>
            <Combobox.GroupLabel />
          </Combobox.Group>

          <Combobox.Collection />
        </Combobox.List>
      </Combobox.Popup>
    </Combobox.Positioner>
  </Combobox.Portal>
</Combobox.Root>

Combobox infers the item type from the defaultValue or value props passed to <Combobox.Root>. When using itemToStringLabel or itemToStringValue, the value prop on the <Combobox.Item> must match the type passed to defaultValue or value. When not specifying value props, the parameter’s type must be explicitly specified.

The following example shows a typed wrapper around the Combobox component with correct type inference and type safety:

Specifying generic type parameters

import * as React from 'react';
import { Combobox } from '@base-ui-components/react/combobox';

export function MyCombobox<Value, Multiple extends boolean | undefined = false>(
  props: Combobox.Root.Props<Value, Multiple>,
): React.JSX.Element {
  return <Combobox.Root {...props}>{/* ... */}</Combobox.Root>;
}

Examples

Multiple select

The combobox can allow multiple selections by adding the multiple prop to <Combobox.Root>. Selection chips are rendered with <Combobox.Chip> inside the input that can be removed.

Programming languages

<Combobox.Input> can be rendered inside <Combobox.Popup> to create a searchable select popup.

Grouped

Organize related options with <Combobox.Group> and <Combobox.GroupLabel> to add section headings inside the popup.

Select produce

Async search (single)

Load items from a remote source by fetching on input changes. Keep the selected item in the items list so it remains available while new results stream in. This pattern avoids needing to load items upfront.

Assign reviewer

Async search (multiple)

Load items from a remote source by fetching on input changes while supporting multiple selections. Selected items remain available in the list while new matches stream in. This pattern avoids needing to load items upfront.

Assign reviewers

Creatable

Create a new item when the filter matches no items, opening a creation <Dialog>.

Labels

Virtualized

Efficiently handle large datasets using a virtualization library like @tanstack/react-virtual.

Search 10,000 items

API reference

Root

Groups all parts of the combobox. Doesn't render its own HTML element.

namestring—

Name: name
Description: Identifies the field when a form is submitted.
Type: string | undefined

defaultValueUnion—

Name: defaultValue
Description: The uncontrolled selected value of the combobox when it's initially rendered.

To render a controlled combobox, use the value prop instead.
Type: Value[] | Value | null | undefined

valueValue[] | Value—

Name: value
Description: The selected value of the combobox. Use when controlled.
Type: Value[] | Value | undefined

onValueChangefunction—

Name: onValueChange
Description: Event handler called when the selected value of the combobox changes.
Type: | (( value: Value[] | Value | any | null, eventDetails: Combobox.Root.ChangeEventDetails, ) => void) | undefined

defaultInputValueUnion—

Name: defaultInputValue
Description: The uncontrolled input value when initially rendered.

To render a controlled input, use the inputValue prop instead.
Type: string | number | string[] | undefined

inputValueUnion—

Name: inputValue
Description: The input value of the combobox. Use when controlled.
Type: string | number | string[] | undefined

onInputValueChangefunction—

Name: onInputValueChange
Description: Event handler called when the input value changes.
Type: | (( inputValue: string, eventDetails: Combobox.Root.ChangeEventDetails, ) => void) | undefined

defaultOpenbooleanfalse

Name: defaultOpen
Description: Whether the popup is initially open.

To render a controlled popup, use the open prop instead.
Type: boolean | undefined
Default: false

openboolean—

Name: open
Description: Whether the popup is currently open. Use when controlled.
Type: boolean | undefined

onOpenChangefunction—

Name: onOpenChange
Description: Event handler called when the popup is opened or closed.
Type: | (( open: boolean, eventDetails: Combobox.Root.ChangeEventDetails, ) => void) | undefined

autoHighlightbooleanfalse

Name: autoHighlight
Description: Whether the first matching item is highlighted automatically while filtering.
Type: boolean | undefined
Default: false

keepHighlightbooleanfalse

Name: keepHighlight
Description: Whether the highlighted item should be preserved when the pointer leaves the list.
Type: boolean | undefined
Default: false

highlightItemOnHoverbooleantrue

Name: highlightItemOnHover
Description: Whether moving the pointer over items should highlight them.
Type: boolean | undefined
Default: true

actionsRefRefObject<Combobox.Root.Actions>—

Name: actionsRef
Description: A ref to imperative actions.

unmount: When specified, the combobox will not be unmounted when closed. Instead, the unmount function must be called to unmount the combobox manually. Useful when the combobox's animation is controlled by an external library.
Type: React.RefObject<Combobox.Root.Actions> | undefined

filterUnion—

Name: filter
Description: Filter function used to match items vs input query.
Type: | (( itemValue: Value, query: string, itemToString: | ((itemValue: Value) => string) | undefined, ) => boolean) | null | undefined

filteredItemsany[] | Group[]—

Name: filteredItems
Description: Filtered items to display in the list. When provided, the list will use these items instead of filtering the items prop internally. Use when you want to control filtering logic externally with the useFilter() hook.
Type: any[] | Group[] | undefined

gridbooleanfalse

Name: grid
Description: Whether list items are presented in a grid layout. When enabled, arrow keys navigate across rows and columns inferred from DOM rows.
Type: boolean | undefined
Default: false

inlinebooleanfalse

Name: inline
Description: Whether the list is rendered inline without using the popup.
Type: boolean | undefined
Default: false

isItemEqualToValue((itemValue: Value, selectedValue: Value) => boolean)—

Name: isItemEqualToValue
Description: Custom comparison logic used to determine if a combobox item value matches the current selected value. Useful when item values are objects without matching referentially. Defaults to Object.is comparison.
Type: | ((itemValue: Value, selectedValue: Value) => boolean) | undefined

itemToStringLabel((itemValue: Value) => string)—

Name: itemToStringLabel
Description: When the item values are objects (<Combobox.Item value={object}>), this function converts the object value to a string representation for display in the input. If the shape of the object is { value, label }, the label will be used automatically without needing to specify this prop.
Type: ((itemValue: Value) => string) | undefined

itemToStringValue((itemValue: Value) => string)—

Name: itemToStringValue
Description: When the item values are objects (<Combobox.Item value={object}>), this function converts the object value to a string representation for form submission. If the shape of the object is { value, label }, the value will be used automatically without needing to specify this prop.
Type: ((itemValue: Value) => string) | undefined

itemsany[] | Group[]—

Name: items
Description: The items to be displayed in the list. Can be either a flat array of items or an array of groups with items.
Type: any[] | Group[] | undefined

limitnumber-1

Name: limit
Description: The maximum number of items to display in the list.
Type: number | undefined
Default: -1

localeIntl.LocalesArgument—

Name: locale
Description: The locale to use for string comparison. Defaults to the user's runtime locale.
Type: Intl.LocalesArgument | undefined

Name: modal
Description: Determines if the popup enters a modal state when open.

true: user interaction is limited to the popup: document page scroll is locked and pointer interactions on outside elements are disabled.

false: user interaction with the rest of the document is allowed.
Type: boolean | undefined
Default: false

multipleboolean | undefinedfalse

Name: multiple
Description: Whether multiple items can be selected.
Type: boolean | undefined
Default: false

onItemHighlightedfunction—

Name: onItemHighlighted
Description: Callback fired when an item is highlighted or unhighlighted. Receives the highlighted item value (or undefined if no item is highlighted) and event details with a reason property describing why the highlight changed. The reason can be:

'keyboard': the highlight changed due to keyboard navigation.

'pointer': the highlight changed due to pointer hovering.

'none': the highlight changed programmatically.
Type: | (( highlightedValue: Value | undefined, eventDetails: Combobox.Root.HighlightEventDetails, ) => void) | undefined

onOpenChangeCompletefunction—

Name: onOpenChangeComplete
Description: Event handler called after any animations complete when the popup is opened or closed.
Type: ((open: boolean) => void) | undefined

openOnInputClickbooleantrue

Name: openOnInputClick
Description: Whether the popup opens when clicking the input.
Type: boolean | undefined
Default: true

virtualizedbooleanfalse

Name: virtualized
Description: Whether the items are being externally virtualized.
Type: boolean | undefined
Default: false

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

readOnlybooleanfalse

Name: readOnly
Description: Whether the user should be unable to choose a different option from the popup.
Type: boolean | undefined
Default: false

requiredbooleanfalse

Name: required
Description: Whether the user must choose a value before submitting a form.
Type: boolean | undefined
Default: false

inputRefRef<HTMLInputElement>—

Name: inputRef
Description: A ref to the hidden input element.
Type: React.Ref<HTMLInputElement> | undefined

idstring—

Name: id
Description: The id of the component.
Type: string | undefined

childrenReactNode—

Name: children
Type: React.ReactNode | undefined

Value

The current value of the combobox. Doesn't render its own HTML element.

childrenReactNode | ((selectedValue: any) => ReactNode)—

Name: children
Type: | React.ReactNode | ((selectedValue: any) => ReactNode)

Icon

An icon that indicates that the trigger button opens the popup. Renders a <span> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Icon.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Icon.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Icon.State, ) => ReactElement)

Input

A text input to search for items in the list. Renders an <input> element.

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Input.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Input.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Input.State, ) => ReactElement)

data-popup-open

Present when the corresponding popup is open.

data-popup-side

Indicates which side the corresponding popup is positioned relative to its anchor.

data-list-empty

Present when the corresponding items list is empty.

data-pressed

Present when the input is pressed.

data-disabled

Present when the component is disabled.

data-readonly

Present when the component is readonly.

data-required

Present when the component is required.

data-valid

Present when the component is in valid state (when wrapped in Field.Root).

data-invalid

Present when the component is in invalid state (when wrapped in Field.Root).

data-dirty

Present when the component's value has changed (when wrapped in Field.Root).

data-touched

Present when the component has been touched (when wrapped in Field.Root).

data-filled

Present when the component has a value (when wrapped in Field.Root).

data-focused

Present when the input is focused (when wrapped in Field.Root).

Attribute	Description	-
`data-popup-open`	Present when the corresponding popup is open.
`data-popup-side`	Indicates which side the corresponding popup is positioned relative to its anchor.
`data-list-empty`	Present when the corresponding items list is empty.
`data-pressed`	Present when the input is pressed.
`data-disabled`	Present when the component is disabled.
`data-readonly`	Present when the component is readonly.
`data-required`	Present when the component is required.
`data-valid`	Present when the component is in valid state (when wrapped in Field.Root).
`data-invalid`	Present when the component is in invalid state (when wrapped in Field.Root).
`data-dirty`	Present when the component's value has changed (when wrapped in Field.Root).
`data-touched`	Present when the component has been touched (when wrapped in Field.Root).
`data-filled`	Present when the component has a value (when wrapped in Field.Root).
`data-focused`	Present when the input is focused (when wrapped in Field.Root).

Clear

Clears the value when clicked. Renders a <button> element.

nativeButtonbooleantrue

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to false if the rendered element is not a button (e.g. <div>).
Type: boolean | undefined
Default: true

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Clear.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Clear.State, ) => CSSProperties | undefined) | undefined

keepMountedbooleanfalse

Name: keepMounted
Description: Whether the component should remain mounted in the DOM when not visible.
Type: boolean | undefined
Default: false

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Clear.State, ) => ReactElement)

data-popup-open

Present when the corresponding popup is open.

data-disabled

Present when the button is disabled.

data-starting-style

Present when the button is animating in.

data-ending-style

Present when the button is animating out.

Attribute	Description	-
`data-popup-open`	Present when the corresponding popup is open.
`data-disabled`	Present when the button is disabled.
`data-starting-style`	Present when the button is animating in.
`data-ending-style`	Present when the button is animating out.

Trigger

A button that opens the popup. Renders a <button> element.

nativeButtonbooleantrue

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to false if the rendered element is not a button (e.g. <div>).
Type: boolean | undefined
Default: true

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Trigger.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Trigger.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Trigger.State, ) => ReactElement)

data-popup-open

Present when the corresponding popup is open.

data-pressed

Present when the trigger is pressed.

data-disabled

Present when the component is disabled.

data-readonly

Present when the component is readonly.

data-required

Present when the component is required.

data-valid

Present when the component is in valid state (when wrapped in Field.Root).

data-invalid

Present when the component is in invalid state (when wrapped in Field.Root).

data-dirty

Present when the component's value has changed (when wrapped in Field.Root).

data-touched

Present when the component has been touched (when wrapped in Field.Root).

data-filled

Present when the component has a value (when wrapped in Field.Root).

data-focused

Present when the trigger is focused (when wrapped in Field.Root).

Attribute	Description	-
`data-popup-open`	Present when the corresponding popup is open.
`data-pressed`	Present when the trigger is pressed.
`data-disabled`	Present when the component is disabled.
`data-readonly`	Present when the component is readonly.
`data-required`	Present when the component is required.
`data-valid`	Present when the component is in valid state (when wrapped in Field.Root).
`data-invalid`	Present when the component is in invalid state (when wrapped in Field.Root).
`data-dirty`	Present when the component's value has changed (when wrapped in Field.Root).
`data-touched`	Present when the component has been touched (when wrapped in Field.Root).
`data-filled`	Present when the component has a value (when wrapped in Field.Root).
`data-focused`	Present when the trigger is focused (when wrapped in Field.Root).

Chips

A container for the chips in a multiselectable input. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Chips.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Chips.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Chips.State, ) => ReactElement)

Chip

An individual chip that represents a value in a multiselectable input. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Chip.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Chip.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Chip.State, ) => ReactElement)

ChipRemove

A button to remove a chip. Renders a <button> element.

nativeButtonbooleantrue

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to false if the rendered element is not a button (e.g. <div>).
Type: boolean | undefined
Default: true

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.ChipRemove.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.ChipRemove.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.ChipRemove.State, ) => ReactElement)

List

A list container for the items. Renders a <div> element.

childrenReactNode | ((item: any, index: number) => ReactNode)—

Name: children
Type: | React.ReactNode | ((item: any, index: number) => ReactNode)

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.List.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.List.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.List.State, ) => ReactElement)

Portal

A portal element that moves the popup to a different part of the DOM. By default, the portal element is appended to <body>. Renders a <div> element.

containerUnion—

Name: container
Description: A parent element to render the portal element into.
Type: | HTMLElement | ShadowRoot | React.RefObject<HTMLElement | ShadowRoot | null> | null | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Portal.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Portal.State, ) => CSSProperties | undefined) | undefined

keepMountedbooleanfalse

Name: keepMounted
Description: Whether to keep the portal mounted in the DOM while the popup is hidden.
Type: boolean | undefined
Default: false

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Portal.State, ) => ReactElement)

Backdrop

An overlay displayed beneath the popup. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Backdrop.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Backdrop.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Backdrop.State, ) => ReactElement)

data-open

Present when the popup is open.

data-closed

Present when the popup is closed.

data-starting-style

Present when the popup is animating in.

data-ending-style

Present when the popup is animating out.

Attribute	Description	-
`data-open`	Present when the popup is open.
`data-closed`	Present when the popup is closed.
`data-starting-style`	Present when the popup is animating in.
`data-ending-style`	Present when the popup is animating out.

Positioner

Positions the popup against the trigger. Renders a <div> element.

disableAnchorTrackingbooleanfalse

Name: disableAnchorTracking
Description: Whether to disable the popup from tracking any layout shift of its positioning anchor.
Type: boolean | undefined
Default: false

alignAlign'center'

Name: align
Description: How to align the popup relative to the specified side.
Type: 'center' | 'end' | 'start' | undefined
Default: 'center'

alignOffsetnumber | OffsetFunction0

Name: alignOffset
Description: Additional offset along the alignment axis in pixels. Also accepts a function that returns the offset to read the dimensions of the anchor and positioner elements, along with its side and alignment.

The function takes a data object parameter with the following properties:

data.anchor: the dimensions of the anchor element with properties width and height.

data.positioner: the dimensions of the positioner element with properties width and height.

data.side: which side of the anchor element the positioner is aligned against.

data.align: how the positioner is aligned relative to the specified side.
Type: | number | ((data: { side: Side align: Align anchor: { width: number; height: number } positioner: { width: number; height: number } }) => number) | undefined
Default: 0
Example: <Positioner alignOffset={({ side, align, anchor, positioner }) => { return side === 'top' || side === 'bottom' ? anchor.width : anchor.height; }} />

sideSide'bottom'

Name: side
Description: Which side of the anchor element to align the popup against. May automatically change to avoid collisions.
Type: | 'left' | 'right' | 'bottom' | 'top' | 'inline-end' | 'inline-start' | undefined
Default: 'bottom'

sideOffsetnumber | OffsetFunction0

Name: sideOffset
Description: Distance between the anchor and the popup in pixels. Also accepts a function that returns the distance to read the dimensions of the anchor and positioner elements, along with its side and alignment.

The function takes a data object parameter with the following properties:

data.anchor: the dimensions of the anchor element with properties width and height.

data.positioner: the dimensions of the positioner element with properties width and height.

data.side: which side of the anchor element the positioner is aligned against.

data.align: how the positioner is aligned relative to the specified side.
Type: | number | ((data: { side: Side align: Align anchor: { width: number; height: number } positioner: { width: number; height: number } }) => number) | undefined
Default: 0
Example: <Positioner sideOffset={({ side, align, anchor, positioner }) => { return side === 'top' || side === 'bottom' ? anchor.height : anchor.width; }} />

arrowPaddingnumber5

Name: arrowPadding
Description: Minimum distance to maintain between the arrow and the edges of the popup.

Use it to prevent the arrow element from hanging out of the rounded corners of a popup.
Type: number | undefined
Default: 5

anchorUnion—

Name: anchor
Description: An element to position the popup against. By default, the popup will be positioned against the trigger.
Type: | Element | React.RefObject<Element | null> | VirtualElement | (() => Element | VirtualElement | null) | null | undefined

collisionAvoidanceCollisionAvoidance—

Name: collisionAvoidance
Description: Determines how to handle collisions when positioning the popup.
Type: | { side?: 'none' | 'flip' align?: 'none' | 'flip' | 'shift' fallbackAxisSide?: 'none' | 'end' | 'start' } | { side?: 'none' | 'shift' align?: 'none' | 'shift' fallbackAxisSide?: 'none' | 'end' | 'start' } | undefined
Example: <Positioner collisionAvoidance={{ side: 'shift', align: 'shift', fallbackAxisSide: 'none', }} />

collisionBoundaryBoundary'clipping-ancestors'

Name: collisionBoundary
Description: An element or a rectangle that delimits the area that the popup is confined to.
Type: | Element | 'clipping-ancestors' | Element[] | Rect | undefined
Default: 'clipping-ancestors'

collisionPaddingPadding5

Name: collisionPadding
Description: Additional space to maintain from the edge of the collision boundary.
Type: | { top?: number right?: number bottom?: number left?: number } | number | undefined
Default: 5

stickybooleanfalse

Name: sticky
Description: Whether to maintain the popup in the viewport after the anchor element was scrolled out of view.
Type: boolean | undefined
Default: false

positionMethod'fixed' | 'absolute''absolute'

Name: positionMethod
Description: Determines which CSS position property to use.
Type: 'fixed' | 'absolute' | undefined
Default: 'absolute'

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Positioner.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Positioner.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Positioner.State, ) => ReactElement)

data-open

Present when the popup is open.

data-closed

Present when the popup is closed.

data-anchor-hidden

Present when the anchor is hidden.

data-align

Indicates how the popup is aligned relative to specified side.

data-empty

Present when the items list is empty.

data-side

Indicates which side the popup is positioned relative to the trigger.

Attribute	Description	-
`data-open`	Present when the popup is open.
`data-closed`	Present when the popup is closed.
`data-anchor-hidden`	Present when the anchor is hidden.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-empty`	Present when the items list is empty.
`data-side`	Indicates which side the popup is positioned relative to the trigger.

--anchor-height

The anchor's height.

--anchor-width

The anchor's width.

--available-height

The available height between the trigger and the edge of the viewport.

--available-width

The available width between the trigger and the edge of the viewport.

--transform-origin

The coordinates that this element is anchored to. Used for animations and transitions.

CSS Variable	Description	-
`--anchor-height`	The anchor's height.
`--anchor-width`	The anchor's width.
`--available-height`	The available height between the trigger and the edge of the viewport.
`--available-width`	The available width between the trigger and the edge of the viewport.
`--transform-origin`	The coordinates that this element is anchored to. Used for animations and transitions.

A container for the list. Renders a <div> element.

initialFocusUnion—

Name: initialFocus
Description: Determines the element to focus when the popup is opened.

false: Do not move focus.

true: Move focus based on the default behavior (first tabbable element or popup).

RefObject: Move focus to the ref element.

function: Called with the interaction type (mouse, touch, pen, or keyboard). Return an element to focus, true to use the default behavior, or false/undefined to do nothing.
Type: | boolean | React.RefObject<HTMLElement | null> | (( openType: InteractionType, ) => boolean | void | HTMLElement | null) | undefined

finalFocusUnion—

Name: finalFocus
Description: Determines the element to focus when the popup is closed.

false: Do not move focus.

true: Move focus based on the default behavior (trigger or previously focused element).

RefObject: Move focus to the ref element.

function: Called with the interaction type (mouse, touch, pen, or keyboard). Return an element to focus, true to use the default behavior, or false/undefined to do nothing.
Type: | boolean | React.RefObject<HTMLElement | null> | (( closeType: InteractionType, ) => boolean | void | HTMLElement | null) | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Popup.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Popup.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Popup.State, ) => ReactElement)

data-open

Present when the popup is open.

data-closed

Present when the popup is closed.

data-align

Indicates how the popup is aligned relative to specified side.

data-empty

Present when the items list is empty.

data-instant

Present if animations should be instant.

data-side

Indicates which side the popup is positioned relative to the trigger.

data-starting-style

Present when the popup is animating in.

data-ending-style

Present when the popup is animating out.

Attribute	Description	-
`data-open`	Present when the popup is open.
`data-closed`	Present when the popup is closed.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-empty`	Present when the items list is empty.
`data-instant`	Present if animations should be instant.
`data-side`	Indicates which side the popup is positioned relative to the trigger.
`data-starting-style`	Present when the popup is animating in.
`data-ending-style`	Present when the popup is animating out.

Arrow

Displays an element positioned against the anchor. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Arrow.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Arrow.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Arrow.State, ) => ReactElement)

data-open

Present when the popup is open.

data-closed

Present when the popup is closed.

data-uncentered

Present when the arrow is uncentered.

data-align

Indicates how the popup is aligned relative to specified side.

data-side

Indicates which side the popup is positioned relative to the trigger.

Attribute	Description	-
`data-open`	Present when the popup is open.
`data-closed`	Present when the popup is closed.
`data-uncentered`	Present when the arrow is uncentered.
`data-align`	Indicates how the popup is aligned relative to specified side.
`data-side`	Indicates which side the popup is positioned relative to the trigger.

Status

Displays a status message whose content changes are announced politely to screen readers. Useful for conveying the status of an asynchronously loaded list. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Status.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Status.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Status.State, ) => ReactElement)

Empty

Renders its children only when the list is empty. Requires the items prop on the root component. Announces changes politely to screen readers. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Empty.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Empty.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Empty.State, ) => ReactElement)

Collection

Renders filtered list items. Doesn't render its own HTML element.

If rendering a flat list, pass a function child to the List component instead, which implicitly wraps it.

children^*((item: any, index: number) => ReactNode)—

Name: children
Type: (item: any, index: number) => ReactNode

Row

Displays a single row of items in a grid list. Enable grid on the root component to turn the listbox into a grid. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Row.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | ((state: Combobox.Row.State) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Row.State, ) => ReactElement)

Item

An individual item in the list. Renders a <div> element.

valueanynull

Name: value
Description: A unique value that identifies this item.
Type: any
Default: null

onClickfunction—

Name: onClick
Description: An optional click handler for the item when selected. It fires when clicking the item with the pointer, as well as when pressing Enter with the keyboard if the item is highlighted when the Input or List element has focus.
Type: React.MouseEventHandler<HTMLElement> | undefined

indexnumber—

Name: index
Description: The index of the item in the list. Improves performance when specified by avoiding the need to calculate the index automatically from the DOM.
Type: number | undefined

nativeButtonbooleanfalse

Name: nativeButton
Description: Whether the component renders a native <button> element when replacing it via the render prop. Set to true if the rendered element is a native button.
Type: boolean | undefined
Default: false

disabledbooleanfalse

Name: disabled
Description: Whether the component should ignore user interaction.
Type: boolean | undefined
Default: false

childrenReactNode—

Name: children
Type: React.ReactNode

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Item.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Item.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Item.State, ) => ReactElement)

data-selected

Present when the item is selected.

data-highlighted

Present when the item is highlighted.

data-disabled

Present when the item is disabled.

Attribute	Description	-
`data-selected`	Present when the item is selected.
`data-highlighted`	Present when the item is highlighted.
`data-disabled`	Present when the item is disabled.

ItemIndicator

Indicates whether the item is selected. Renders a <span> element.

childrenReactNode—

Name: children
Type: React.ReactNode

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | (( state: Combobox.ItemIndicator.State, ) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.ItemIndicator.State, ) => CSSProperties | undefined) | undefined

keepMountedbooleanfalse

Name: keepMounted
Description: Whether to keep the HTML element in the DOM when the item is not selected.
Type: boolean | undefined
Default: false

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.ItemIndicator.State, ) => ReactElement)

Group

Groups related items with the corresponding label. Renders a <div> element.

itemsany[]—

Name: items
Description: Items to be rendered within this group. When provided, child Collection components will use these items.
Type: any[] | undefined

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.Group.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.Group.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.Group.State, ) => ReactElement)

GroupLabel

An accessible label that is automatically associated with its parent group. Renders a <div> element.

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Combobox.GroupLabel.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | (( state: Combobox.GroupLabel.State, ) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Combobox.GroupLabel.State, ) => ReactElement)

Separator

A separator element accessible to screen readers. Renders a <div> element.

orientationOrientation'horizontal'

Name: orientation
Description: The orientation of the separator.
Type: 'horizontal' | 'vertical' | undefined
Default: 'horizontal'

classNamestring | function—

Name: className
Description: CSS class applied to the element, or a function that returns a class based on the component’s state.
Type: | string | ((state: Separator.State) => string | undefined)

styleReact.CSSProperties | function—

Name: style
Type: | React.CSSProperties | ((state: Separator.State) => CSSProperties | undefined) | undefined

renderReactElement | function—

Name: render
Description: Allows you to replace the component’s HTML element with a different tag, or compose it with another component.

Accepts a ReactElement or a function that returns the element to render.
Type: | ReactElement | (( props: HTMLProps, state: Separator.State, ) => ReactElement)

useFilter

Matches items against a query using Intl.Collator for robust string matching. This hook is used when externally filtering items. Pass the result to the filter prop of <Combobox.Root>.

Input parameters

Accepts all Intl.CollatorOptions, plus the following options:

localeIntl.LocalesArgument—

Name: locale
Description: The locale to use for string comparison.
Type: Intl.LocalesArgument

multiplebooleanfalse

Name: multiple
Description: Whether the combobox is in multiple selection mode.
Type: boolean
Default: false

valueany—

Name: value
Description: The current value of the combobox. For single selection, pass this so all items are visible when the query is empty or matches the selection.
Type: any

Return value

contains(itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean—

Name: contains
Description: Returns whether the item matches the query anywhere.
Type: (itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean

startsWith(itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean—

Name: startsWith
Description: Returns whether the item starts with the query.
Type: (itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean

endsWith(itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean—

Name: endsWith
Description: Returns whether the item ends with the query.
Type: (itemValue: any, query: string, itemToString?: (itemValue) => string) => boolean