Combobox

import { ComboboxDemos } from '@docs/demos'; import { Layout } from '@/layout'; import { MDX_DATA } from '@/mdx';

export default Layout(MDX_DATA.Combobox);

Examples

This page contains only a small set of examples, as the full code of the demos is long. You can find all 50+ examples on a separate page.

Usage

Combobox provides a set of components and hooks to create custom select, multiselect or autocomplete components. The component is very flexible – you have full control of the rendering and logic.

useCombobox hook

useCombobox hook provides a combobox store. The store contains the current state of the component and handlers to update it. The created store must be passed to the store prop of Combobox:

tsx

import { Combobox, useCombobox } from '@mantine/core';

function Demo() {
  const combobox = useCombobox();
  return (
    <Combobox store={combobox}></Combobox>
  );
}

useCombobox options

The useCombobox hook accepts an options object with the following properties:

tsx

interface UseComboboxOptions {
  /** Default value for `dropdownOpened`, `false` by default */
  defaultOpened?: boolean;

  /** Controlled `dropdownOpened` state */
  opened?: boolean;

  /** Called when `dropdownOpened` state changes */
  onOpenedChange?(opened: boolean): void;

  /** Called when dropdown closes with event source: keyboard, mouse or unknown */
  onDropdownClose?(eventSource: ComboboxDropdownEventSource): void;

  /** Called when dropdown opens with event source: keyboard, mouse or unknown */
  onDropdownOpen?(eventSource: ComboboxDropdownEventSource): void;

  /** Determines whether arrow key presses should loop though items (first to last and last to first), `true` by default */
  loop?: boolean;

  /** `behavior` passed down to `element.scrollIntoView`, `'instant'` by default */
  scrollBehavior?: ScrollBehavior;
}

You can import the UseComboboxOptions type from the @mantine/core package:

tsx

import type { UseComboboxOptions } from '@mantine/core';

Combobox store

The Combobox store is an object with the following properties:

tsx

interface ComboboxStore {
  /** Current dropdown opened state */
  dropdownOpened: boolean;

  /** Opens dropdown */
  openDropdown(eventSource?: 'keyboard' | 'mouse' | 'unknown'): void;

  /** Closes dropdown */
  closeDropdown(eventSource?: 'keyboard' | 'mouse' | 'unknown'): void;

  /** Toggles dropdown opened state */
  toggleDropdown(
    eventSource?: 'keyboard' | 'mouse' | 'unknown'
  ): void;

  /** Selected option index */
  selectedOptionIndex: number;

  /** Selects `Combobox.Option` by index */
  selectOption(index: number): void;

  /** Selects first `Combobox.Option` with `active` prop.
   *  If there are no such options, the function does nothing.
   */
  selectActiveOption(): string | null;

  /** Selects first `Combobox.Option` that is not disabled.
   *  If there are no such options, the function does nothing.
   * */
  selectFirstOption(): string | null;

  /** Selects next `Combobox.Option` that is not disabled.
   *  If the current option is the last one, the function selects first option, if `loop` is true.
   */
  selectNextOption(): string | null;

  /** Selects previous `Combobox.Option` that is not disabled.
   *  If the current option is the first one, the function selects last option, if `loop` is true.
   * */
  selectPreviousOption(): string | null;

  /** Resets selected option index to -1, removes `data-combobox-selected` from selected option */
  resetSelectedOption(): void;

  /** Triggers `onClick` event of selected option.
   *  If there is no selected option, the function does nothing.
   */
  clickSelectedOption(): void;

  /** Updates selected option index to currently selected or active option.
   *  The function is required to be used with searchable components to update selected option index
   *  when options list changes based on search query.
   */
  updateSelectedOptionIndex(target?: 'active' | 'selected'): void;

  /** List id, used for `aria-*` attributes */
  listId: string | null;

  /** Sets list id */
  setListId(id: string): void;

  /** Ref of `Combobox.Search` input */
  searchRef: React.RefObject<HTMLInputElement | null>;

  /** Moves focus to `Combobox.Search` input */
  focusSearchInput(): void;

  /** Ref of the target element */
  targetRef: React.RefObject<HTMLElement | null>;

  /** Moves focus to the target element */
  focusTarget(): void;
}

You can import ComboboxStore type from @mantine/core package:

tsx

import type { ComboboxStore } from '@mantine/core';

useCombobox handlers

Combobox store handlers can be used to control Combobox state. For example, to open the dropdown, call openDropdown handler:

tsx

import { Button, Combobox, useCombobox } from '@mantine/core';

function Demo() {
  const combobox = useCombobox();

  return (
    <Combobox>
      <Combobox.Target>
        <Button onClick={() => combobox.openDropdown()}>
          Open dropdown
        </Button>
      </Combobox.Target>
    </Combobox>
  );
}

You can use store handlers in useCombobox options. For example, you can call selectFirstOption when the dropdown is opened and resetSelectedOption when it is closed:

tsx

import { Combobox, useCombobox } from '@mantine/core';

function Demo() {
  const combobox = useCombobox({
    onDropdownOpen: () => combobox.selectFirstOption(),
    onDropdownClose: () => combobox.resetSelectedOption(),
  });

  return (
    <Combobox store={combobox}></Combobox>
  );
}

Combobox.Target

Combobox.Target should be used as a wrapper for the target element or component. Combobox.Target marks its child as a target for dropdown and sets aria-* attributes and adds keyboard event listeners to it.

Combobox.Target requires a single child element or component. The child component must accept ref and ...others props. You can use any Mantine component as a target without any additional configuration, for example, Button, TextInput or InputBase.

Example of using Combobox.Target with TextInput component:

Example of using Combobox.Target with Button component:

In some cases, you might need to use different elements as an events target and as a dropdown. Use Combobox.EventsTarget to add aria-* attributes and keyboard event handlers, and Combobox.DropdownTarget to position the dropdown relative to the target.

You can have as many Combobox.EventsTarget as you need, but only one Combobox.DropdownTarget per Combobox.

Example of using Combobox.EventsTarget and Combobox.DropdownTarget with PillsInput component to create a searchable multiselect component:

Update selected option index

updateSelectedOptionIndex handler is required to be called when options list changes. Usually, the options list changes when options are filtered based on the search query. In this case, you need to call updateSelectedOptionIndex in onChange handler of the search input.

Example of using updateSelectedOptionIndex handler in searchable select component:

Search input

If you prefer search input inside the dropdown, use Combobox.Search component. To focus the search input, call combobox.focusSearchInput, usually it is done when the dropdown is opened. To prevent focus loss after the dropdown is closed, call combobox.focusTarget:

Select first option

Use combobox.selectFirstOption function to select the first option. It is useful if you want to select the first option when user searching for options in the list. If there are no options available, it will do nothing.

Active option

Set active prop on Combobox.Option component to mark it as active. By default, an active option does not have any styles, you can use data-combobox-active data attribute to style it.

combobox.selectActiveOption function selects active option. Usually, it is called when the dropdown is opened:

Options groups

Render Combobox.Option components inside Combobox.Group to create options group. Combobox.Group label will be automatically hidden if the group does not have any children.

Scrollable list

Set max-height style on either Combobox.Dropdown or Combobox.Options to make the options list scrollable. You can use mah style prop to set max-height.

Scrollable list with ScrollArea

You can also use ScrollArea or ScrollArea.Autosize components instead of native scrollbars:

Set floatingHeight="viewport" to make the dropdown grow to fill the available vertical space in the viewport. The dropdown size is recalculated automatically when the trigger position changes. When the prop is set, the flip middleware is disabled – the dropdown always opens in the configured direction and is constrained to the viewport edges instead of flipping to the other side.

The dropdown exposes a --combobox-floating-options-max-height CSS variable equal to the available height minus the dropdown padding. Pass it as mah to your ScrollArea.Autosize (or use it on any element you want to scroll within the bounded dropdown):

Set hidden prop on Combobox.Dropdown to hide the dropdown. For example, it can be useful when you want to show the dropdown only when there is at least one option available:

To control the dropdown opened state, pass opened to useCombobox hook:

Combobox supports most of Popover props. For example, you can control dropdown position with position prop and disable Floating UI middlewares with middlewares prop:

You can use Combobox without dropdown. To do so, use Combobox.EventsTarget instead of Combobox.Target:

Virtualization

useVirtualizedCombobox hook can be used to create comboboxes with virtualized options list. Note that due to the nature of virtualization, the hook requires some additional configuration compared to the useCombobox hook. In useVirtualizedCombobox hook all operations related to option indexing do not rely on the actual DOM structure, instead, you need to preserve values in React state and pass them to the hook.

useVirtualizedCombobox does not depend on any specific virtualization library. The recommended option is @tanstack/react-virtual:

Example of implementation with react-virtuoso:

You can find more virtualization examples on the Combobox examples page.

Hook options:

tsx

export interface UseVirtualizedComboboxOptions {
  /** Default value for `dropdownOpened`, `false` by default */
  defaultOpened?: boolean;

  /** Controlled `dropdownOpened` state */
  opened?: boolean;

  /** Called when `dropdownOpened` state changes */
  onOpenedChange?: (opened: boolean) => void;

  /** Called when dropdown closes */
  onDropdownClose?: (eventSource: ComboboxDropdownEventSource) => void;

  /** Called when dropdown opens */
  onDropdownOpen?: (eventSource: ComboboxDropdownEventSource) => void;

  /** Determines whether arrow key presses should loop though items (first to last and last to first), `true` by default */
  loop?: boolean;

  /** Function to determine whether the option is disabled */
  isOptionDisabled?: (optionIndex: number) => boolean;

  /** Total number of options in the virtualized list. Required for proper keyboard navigation and index calculations. */
  totalOptionsCount: number;

  /** Function that returns the id of the option at the given index. Required for setting aria attributes and element references. */
  getOptionId: (index: number) => string | null;

  /** Current selected option index. Must be controlled by parent component. */
  selectedOptionIndex: number;

  /** Callback to update the selected option index. Called when user navigates or selects options. */
  setSelectedOptionIndex: (index: number) => void;

  /** Currently active/highlighted option index. Used to determine which option to select when selectActiveOption is called. */
  activeOptionIndex?: number;

  /** Called when the selected option is submitted (e.g., via Enter key or clicking). Receives the selected option index. */
  onSelectedOptionSubmit: (index: number) => void;
}