useComboBox

Provides the behavior and accessibility implementation for a combo box component. A combo box combines a text input with a listbox, allowing users to filter a list of options to items matching a query.

install	`yarn add @react-aria/combobox`
version	3.0.0-rc.0
usage	`import {useComboBox} from '@react-aria/combobox'`

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NPM

API#

useComboBox<T>(
  (props: AriaComboBoxProps<T>,
  , state: ComboBoxState<T>
)): ComboBoxAria

Features#

A combo box can be built using the <datalist> HTML element, but this is very limited in functionality and difficult to style. useComboBox helps achieve accessible combo box components that can be styled as needed.

Support for filtering a list of options by typing
Support for selecting a single option
Support for disabled options
Support for groups of items in sections
Support for custom user input values
Support for controlled and uncontrolled options, selection, input value, and open state
Support for custom filter functions
Exposed to assistive technology as a combobox with ARIA
Labeling support for accessibility
Required and invalid states exposed to assistive technology via ARIA
Support for mouse, touch, and keyboard interactions
Keyboard support for opening the combo box list box 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
Handles virtual clicks on the input from touch screen readers to toggle the list box
Virtual focus management for combo box list box option navigation
Hides elements outside the input and list box from assistive technology while the list box is open in a portal
Custom localized announcements for option focusing, filtering, and selection using an ARIA live region to work around VoiceOver bugs

Anatomy#

A combo box consists of a label, an input which displays the current value, a list box popup, and an optional button used to toggle the list box popup open state. Users can type within the input to filter the available options within the list box. The list box popup may be opened by a variety of input field interactions specified by the menuTrigger prop provided to useComboBox, or by clicking or touching the button. useComboBox handles exposing the correct ARIA attributes for accessibility for each of the elements comprising the combo box. It should be combined with useListBox, which handles the implementation of the popup list box, and useButton which handles the button press interactions.

useComboBox returns props that you should spread onto the appropriate elements:

Name	Type	Description
`buttonProps`	`AriaButtonProps`	Props for the combo box menu trigger button.
`inputProps`	`InputHTMLAttributes<HTMLInputElement>`	Props for the combo box input element.
`listBoxProps`	`HTMLAttributes<HTMLElement>`	Props for the combo box menu.
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the combo box label element.

State is managed by the useComboBoxState hook from @react-stately/combobox. The state object should be passed as an option to useComboBox.

If the combo box does not have a visible label, an aria-label or aria-labelledby prop must be passed instead to identify it to assistive technology.

State management#

useComboBox requires knowledge of the options in the combo box in order to handle keyboard navigation and other interactions. It does this using the Collection interface, which is a generic interface to access sequential unique keyed data. You can implement this interface yourself, e.g. by using a prop to pass a list of item objects, but useComboBoxState from @react-stately/combobox implements a JSX based interface for building collections instead. See Collection Components for more information, and Collection Interface for internal details.

In addition, useComboBoxState manages the state necessary for single selection and exposes a SelectionManager, which makes use of the collection to provide an interface to update the selection state. It also holds state to track if the popup is open, if the combo box is focused, and the current input value. For more information about selection, see Selection.

Example#

This example uses an <input> element for the combo box text input and a <button> element for the list box popup trigger. A <span> is included within the <button> to display the dropdown arrow icon (hidden from screen readers with aria-hidden). A "contains" filter function is obtained from useFilter and is passed to useComboBoxState so that the list box can be filtered based on the option text and the current input text.

The list box popup uses useListBox and useOption to render the list of options. A hidden <DismissButton> is added at the end of the popup to allow screen reader users to dismiss the popup easily, without navigating back through the entire list. Note that shouldUseVirtualFocus is passed to useListBox and useOption so that browser focus remains within the <input> element even when interacting with the list box options.

This example does not do any advanced popover positioning or portaling to escape its visual container. See useOverlayTrigger for an example of how to implement this using useOverlayPosition.

In addition, see useListBox for examples of sections (option groups), and more complex options.

import {Item} from '@react-stately/collections';
import {mergeProps} from '@react-aria/utils';
import {useButton} from '@react-aria/button';
import {useComboBoxState} from '@react-stately/combobox';
import {useFilter} from '@react-aria/i18n';
import {useListBox, useOption} from '@react-aria/listbox';
import {useOverlay, DismissButton} from '@react-aria/overlays';

function ComboBox(props) {
  // Get a basic "contains" filter function for input value
  // and option text comparison
  let {contains} = useFilter({sensitivity: 'base'});

  // Create state based on the incoming props and the filter function
  let state = useComboBoxState({...props, defaultFilter: contains});

  let triggerRef = React.useRef();
  let inputRef = React.useRef();
  let listBoxRef = React.useRef();
  let popoverRef = React.useRef();

  // Get props for child elements from useComboBox
  let {
    buttonProps: triggerProps,
    inputProps,
    listBoxProps,
    labelProps
  } = useComboBox(
    {
      ...props,
      inputRef,
      buttonRef: triggerRef,
      listBoxRef,
      popoverRef,
      menuTrigger: 'input'
    },
    state
  );

  // Get props for the trigger button based on the
  // button props from useComboBox
  let {buttonProps} = useButton(triggerProps, triggerRef);

  return (
    <div style={{display: 'inline-flex', flexDirection: 'column'}}>
      <label {...labelProps}>{props.label}</label>
      <div style={{position: 'relative', display: 'inline-block'}}>
        <input
          {...inputProps}
          ref={inputRef}
          style={{
            height: 22,
            boxSizing: 'border-box',
            marginRight: 0
          }}
        />
        <button
          {...buttonProps}
          ref={triggerRef}
          style={{
            height: 22,
            marginLeft: 0
          }}>
          <span aria-hidden="true" style={{padding: '0 2px'}}>
            ▼
          </span>
        </button>
        {state.isOpen && (
          <ListBoxPopup
            {...listBoxProps}
            // Use virtual focus to get aria-activedescendant tracking and
            // ensure focus doesn't leave the input field
            shouldUseVirtualFocus
            listBoxRef={listBoxRef}
            popoverRef={popoverRef}
            state={state}
          />
        )}
      </div>
    </div>
  );
}

function ListBoxPopup(props) {
  let {
    popoverRef,
    listBoxRef,
    state,
    shouldUseVirtualFocus,
    ...otherProps
  } = props;

  // Get props for the list box.
  // Prevent focus moving to list box via shouldUseVirtualFocus
  let {listBoxProps} = useListBox(
    {
      autoFocus: state.focusStrategy,
      disallowEmptySelection: true,
      shouldUseVirtualFocus,
      ...otherProps
    },
    state,
    listBoxRef
  );

  // Handle events that should cause the popup to close,
  // e.g. blur, clicking outside, or pressing the escape key.
  let {overlayProps} = useOverlay(
    {
      onClose: () => state.close(),
      shouldCloseOnBlur: true,
      isOpen: state.isOpen,
      isDismissable: true
    },
    popoverRef
  );

  // Add a hidden <DismissButton> component at the end of the list
  // to allow screen reader users to dismiss the popup easily.
  return (
    <div {...overlayProps} ref={popoverRef}>
      <ul
        {...mergeProps(listBoxProps, otherProps)}
        ref={listBoxRef}
        style={{
          position: 'absolute',
          width: '100%',
          margin: '4px 0 0 0',
          padding: 0,
          listStyle: 'none',
          border: '1px solid gray',
          background: 'lightgray'
        }}>
        {[...state.collection].map((item) => (
          <Option
            shouldUseVirtualFocus
            key={item.key}
            item={item}
            state={state}
          />
        ))}
      </ul>
      <DismissButton onDismiss={() => state.close()} />
    </div>
  );
}

function Option({item, state, shouldUseVirtualFocus}) {
  let ref = React.useRef();
  let isDisabled = state.disabledKeys.has(item.key);
  let isSelected = state.selectionManager.isSelected(item.key);
  // Track focus via focusedKey state instead of with focus event listeners
  // since focus never leaves the text input in a ComboBox
  let isFocused = state.selectionManager.focusedKey === item.key;

  // Get props for the option element.
  // Prevent options from receiving browser focus via shouldUseVirtualFocus.
  let {optionProps} = useOption(
    {
      key: item.key,
      isDisabled,
      isSelected,
      shouldSelectOnPressUp: true,
      shouldFocusOnHover: true,
      shouldUseVirtualFocus
    },
    state,
    ref
  );

  let backgroundColor;
  let color = 'black';

  if (isSelected) {
    backgroundColor = 'blueviolet';
    color = 'white';
  } else if (isFocused) {
    backgroundColor = 'gray';
  } else if (isDisabled) {
    backgroundColor = 'transparent';
    color = 'gray';
  }

  return (
    <li
      {...optionProps}
      ref={ref}
      style={{
        background: backgroundColor,
        color: color,
        padding: '2px 5px',
        outline: 'none',
        cursor: 'pointer'
      }}>
      {item.rendered}
    </li>
  );
}

<ComboBox label="Favorite Animal">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

import {Item} from '@react-stately/collections';
import {mergeProps} from '@react-aria/utils';
import {useButton} from '@react-aria/button';
import {useComboBoxState} from '@react-stately/combobox';
import {useFilter} from '@react-aria/i18n';
import {useListBox, useOption} from '@react-aria/listbox';
import {
  useOverlay,
  DismissButton
} from '@react-aria/overlays';

function ComboBox(props) {
  // Get a basic "contains" filter function for input value
  // and option text comparison
  let {contains} = useFilter({sensitivity: 'base'});

  // Create state based on the incoming props and the filter function
  let state = useComboBoxState({
    ...props,
    defaultFilter: contains
  });

  let triggerRef = React.useRef();
  let inputRef = React.useRef();
  let listBoxRef = React.useRef();
  let popoverRef = React.useRef();

  // Get props for child elements from useComboBox
  let {
    buttonProps: triggerProps,
    inputProps,
    listBoxProps,
    labelProps
  } = useComboBox(
    {
      ...props,
      inputRef,
      buttonRef: triggerRef,
      listBoxRef,
      popoverRef,
      menuTrigger: 'input'
    },
    state
  );

  // Get props for the trigger button based on the
  // button props from useComboBox
  let {buttonProps} = useButton(triggerProps, triggerRef);

  return (
    <div
      style={{
        display: 'inline-flex',
        flexDirection: 'column'
      }}>
      <label {...labelProps}>{props.label}</label>
      <div
        style={{
          position: 'relative',
          display: 'inline-block'
        }}>
        <input
          {...inputProps}
          ref={inputRef}
          style={{
            height: 22,
            boxSizing: 'border-box',
            marginRight: 0
          }}
        />
        <button
          {...buttonProps}
          ref={triggerRef}
          style={{
            height: 22,
            marginLeft: 0
          }}>
          <span
            aria-hidden="true"
            style={{padding: '0 2px'}}>
            ▼
          </span>
        </button>
        {state.isOpen && (
          <ListBoxPopup
            {...listBoxProps}
            // Use virtual focus to get aria-activedescendant tracking and
            // ensure focus doesn't leave the input field
            shouldUseVirtualFocus
            listBoxRef={listBoxRef}
            popoverRef={popoverRef}
            state={state}
          />
        )}
      </div>
    </div>
  );
}

function ListBoxPopup(props) {
  let {
    popoverRef,
    listBoxRef,
    state,
    shouldUseVirtualFocus,
    ...otherProps
  } = props;

  // Get props for the list box.
  // Prevent focus moving to list box via shouldUseVirtualFocus
  let {listBoxProps} = useListBox(
    {
      autoFocus: state.focusStrategy,
      disallowEmptySelection: true,
      shouldUseVirtualFocus,
      ...otherProps
    },
    state,
    listBoxRef
  );

  // Handle events that should cause the popup to close,
  // e.g. blur, clicking outside, or pressing the escape key.
  let {overlayProps} = useOverlay(
    {
      onClose: () => state.close(),
      shouldCloseOnBlur: true,
      isOpen: state.isOpen,
      isDismissable: true
    },
    popoverRef
  );

  // Add a hidden <DismissButton> component at the end of the list
  // to allow screen reader users to dismiss the popup easily.
  return (
    <div {...overlayProps} ref={popoverRef}>
      <ul
        {...mergeProps(listBoxProps, otherProps)}
        ref={listBoxRef}
        style={{
          position: 'absolute',
          width: '100%',
          margin: '4px 0 0 0',
          padding: 0,
          listStyle: 'none',
          border: '1px solid gray',
          background: 'lightgray'
        }}>
        {[...state.collection].map((item) => (
          <Option
            shouldUseVirtualFocus
            key={item.key}
            item={item}
            state={state}
          />
        ))}
      </ul>
      <DismissButton onDismiss={() => state.close()} />
    </div>
  );
}

function Option({item, state, shouldUseVirtualFocus}) {
  let ref = React.useRef();
  let isDisabled = state.disabledKeys.has(item.key);
  let isSelected = state.selectionManager.isSelected(
    item.key
  );
  // Track focus via focusedKey state instead of with focus event listeners
  // since focus never leaves the text input in a ComboBox
  let isFocused =
    state.selectionManager.focusedKey === item.key;

  // Get props for the option element.
  // Prevent options from receiving browser focus via shouldUseVirtualFocus.
  let {optionProps} = useOption(
    {
      key: item.key,
      isDisabled,
      isSelected,
      shouldSelectOnPressUp: true,
      shouldFocusOnHover: true,
      shouldUseVirtualFocus
    },
    state,
    ref
  );

  let backgroundColor;
  let color = 'black';

  if (isSelected) {
    backgroundColor = 'blueviolet';
    color = 'white';
  } else if (isFocused) {
    backgroundColor = 'gray';
  } else if (isDisabled) {
    backgroundColor = 'transparent';
    color = 'gray';
  }

  return (
    <li
      {...optionProps}
      ref={ref}
      style={{
        background: backgroundColor,
        color: color,
        padding: '2px 5px',
        outline: 'none',
        cursor: 'pointer'
      }}>
      {item.rendered}
    </li>
  );
}

<ComboBox label="Favorite Animal">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

import {Item} from '@react-stately/collections';
import {mergeProps} from '@react-aria/utils';
import {useButton} from '@react-aria/button';
import {useComboBoxState} from '@react-stately/combobox';
import {useFilter} from '@react-aria/i18n';
import {
  useListBox,
  useOption
} from '@react-aria/listbox';
import {
  useOverlay,
  DismissButton
} from '@react-aria/overlays';

function ComboBox(
  props
) {
  // Get a basic "contains" filter function for input value
  // and option text comparison
  let {
    contains
  } = useFilter({
    sensitivity: 'base'
  });

  // Create state based on the incoming props and the filter function
  let state = useComboBoxState(
    {
      ...props,
      defaultFilter: contains
    }
  );

  let triggerRef = React.useRef();
  let inputRef = React.useRef();
  let listBoxRef = React.useRef();
  let popoverRef = React.useRef();

  // Get props for child elements from useComboBox
  let {
    buttonProps: triggerProps,
    inputProps,
    listBoxProps,
    labelProps
  } = useComboBox(
    {
      ...props,
      inputRef,
      buttonRef: triggerRef,
      listBoxRef,
      popoverRef,
      menuTrigger:
        'input'
    },
    state
  );

  // Get props for the trigger button based on the
  // button props from useComboBox
  let {
    buttonProps
  } = useButton(
    triggerProps,
    triggerRef
  );

  return (
    <div
      style={{
        display:
          'inline-flex',
        flexDirection:
          'column'
      }}>
      <label
        {...labelProps}>
        {props.label}
      </label>
      <div
        style={{
          position:
            'relative',
          display:
            'inline-block'
        }}>
        <input
          {...inputProps}
          ref={inputRef}
          style={{
            height: 22,
            boxSizing:
              'border-box',
            marginRight: 0
          }}
        />
        <button
          {...buttonProps}
          ref={
            triggerRef
          }
          style={{
            height: 22,
            marginLeft: 0
          }}>
          <span
            aria-hidden="true"
            style={{
              padding:
                '0 2px'
            }}>
            ▼
          </span>
        </button>
        {state.isOpen && (
          <ListBoxPopup
            {...listBoxProps}
            // Use virtual focus to get aria-activedescendant tracking and
            // ensure focus doesn't leave the input field
            shouldUseVirtualFocus
            listBoxRef={
              listBoxRef
            }
            popoverRef={
              popoverRef
            }
            state={state}
          />
        )}
      </div>
    </div>
  );
}

function ListBoxPopup(
  props
) {
  let {
    popoverRef,
    listBoxRef,
    state,
    shouldUseVirtualFocus,
    ...otherProps
  } = props;

  // Get props for the list box.
  // Prevent focus moving to list box via shouldUseVirtualFocus
  let {
    listBoxProps
  } = useListBox(
    {
      autoFocus:
        state.focusStrategy,
      disallowEmptySelection: true,
      shouldUseVirtualFocus,
      ...otherProps
    },
    state,
    listBoxRef
  );

  // Handle events that should cause the popup to close,
  // e.g. blur, clicking outside, or pressing the escape key.
  let {
    overlayProps
  } = useOverlay(
    {
      onClose: () =>
        state.close(),
      shouldCloseOnBlur: true,
      isOpen:
        state.isOpen,
      isDismissable: true
    },
    popoverRef
  );

  // Add a hidden <DismissButton> component at the end of the list
  // to allow screen reader users to dismiss the popup easily.
  return (
    <div
      {...overlayProps}
      ref={popoverRef}>
      <ul
        {...mergeProps(
          listBoxProps,
          otherProps
        )}
        ref={listBoxRef}
        style={{
          position:
            'absolute',
          width: '100%',
          margin:
            '4px 0 0 0',
          padding: 0,
          listStyle:
            'none',
          border:
            '1px solid gray',
          background:
            'lightgray'
        }}>
        {[
          ...state.collection
        ].map((item) => (
          <Option
            shouldUseVirtualFocus
            key={
              item.key
            }
            item={item}
            state={state}
          />
        ))}
      </ul>
      <DismissButton
        onDismiss={() =>
          state.close()
        }
      />
    </div>
  );
}

function Option({
  item,
  state,
  shouldUseVirtualFocus
}) {
  let ref = React.useRef();
  let isDisabled = state.disabledKeys.has(
    item.key
  );
  let isSelected = state.selectionManager.isSelected(
    item.key
  );
  // Track focus via focusedKey state instead of with focus event listeners
  // since focus never leaves the text input in a ComboBox
  let isFocused =
    state
      .selectionManager
      .focusedKey ===
    item.key;

  // Get props for the option element.
  // Prevent options from receiving browser focus via shouldUseVirtualFocus.
  let {
    optionProps
  } = useOption(
    {
      key: item.key,
      isDisabled,
      isSelected,
      shouldSelectOnPressUp: true,
      shouldFocusOnHover: true,
      shouldUseVirtualFocus
    },
    state,
    ref
  );

  let backgroundColor;
  let color = 'black';

  if (isSelected) {
    backgroundColor =
      'blueviolet';
    color = 'white';
  } else if (isFocused) {
    backgroundColor =
      'gray';
  } else if (
    isDisabled
  ) {
    backgroundColor =
      'transparent';
    color = 'gray';
  }

  return (
    <li
      {...optionProps}
      ref={ref}
      style={{
        background: backgroundColor,
        color: color,
        padding:
          '2px 5px',
        outline: 'none',
        cursor: 'pointer'
      }}>
      {item.rendered}
    </li>
  );
}

<ComboBox label="Favorite Animal">
  <Item key="red panda">
    Red Panda
  </Item>
  <Item key="cat">
    Cat
  </Item>
  <Item key="dog">
    Dog
  </Item>
  <Item key="aardvark">
    Aardvark
  </Item>
  <Item key="kangaroo">
    Kangaroo
  </Item>
  <Item key="snake">
    Snake
  </Item>
</ComboBox>

Usage#

The following examples show how to use the ComboBox component created in the above example.

Uncontrolled#

The following example shows how you would create an uncontrolled ComboBox. The input value, selected option, and open state is completely uncontrolled, with the default input text set by the defaultInputValue prop.

<ComboBox label="Favorite Animal" defaultInputValue="red">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox label="Favorite Animal" defaultInputValue="red">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox
  label="Favorite Animal"
  defaultInputValue="red">
  <Item key="red panda">
    Red Panda
  </Item>
  <Item key="cat">
    Cat
  </Item>
  <Item key="dog">
    Dog
  </Item>
  <Item key="aardvark">
    Aardvark
  </Item>
  <Item key="kangaroo">
    Kangaroo
  </Item>
  <Item key="snake">
    Snake
  </Item>
</ComboBox>

Dynamic collections#

ComboBox follows the Collection Components API, accepting both static and dynamic collections. The examples above show static collections, which can be used when the full list of options is known ahead of time. Dynamic collections, as shown below, can be used when the options come from an external data source such as an API call, or update over time.

As seen below, an iterable list of options is passed to the ComboBox using the defaultItems prop. Each item accepts a key prop, which is passed to the onSelectionChange handler to identify the selected item. Alternatively, if the item objects contain an id property, as shown in the example below, then this is used automatically and a key prop is not required.

function Example() {
  let options = [
    {id: 1, name: 'Aerospace'},
    {id: 2, name: 'Mechanical'},
    {id: 3, name: 'Civil'},
    {id: 4, name: 'Biomedical'},
    {id: 5, name: 'Nuclear'},
    {id: 6, name: 'Industrial'},
    {id: 7, name: 'Chemical'},
    {id: 8, name: 'Agricultural'},
    {id: 9, name: 'Electrical'}
  ];
  let [majorId, setMajorId] = React.useState();

  return (
    <>
      <ComboBox
        label="Pick a engineering major"
        defaultItems={options}
        onSelectionChange={setMajorId}>
        {(item) => <Item>{item.name}</Item>}
      </ComboBox>
      <p>Selected topic id: {majorId}</p>
    </>
  );
}

function Example() {
  let options = [
    {id: 1, name: 'Aerospace'},
    {id: 2, name: 'Mechanical'},
    {id: 3, name: 'Civil'},
    {id: 4, name: 'Biomedical'},
    {id: 5, name: 'Nuclear'},
    {id: 6, name: 'Industrial'},
    {id: 7, name: 'Chemical'},
    {id: 8, name: 'Agricultural'},
    {id: 9, name: 'Electrical'}
  ];
  let [majorId, setMajorId] = React.useState();

  return (
    <>
      <ComboBox
        label="Pick a engineering major"
        defaultItems={options}
        onSelectionChange={setMajorId}>
        {(item) => <Item>{item.name}</Item>}
      </ComboBox>
      <p>Selected topic id: {majorId}</p>
    </>
  );
}

function Example() {
  let options = [
    {
      id: 1,
      name: 'Aerospace'
    },
    {
      id: 2,
      name: 'Mechanical'
    },
    {
      id: 3,
      name: 'Civil'
    },
    {
      id: 4,
      name: 'Biomedical'
    },
    {
      id: 5,
      name: 'Nuclear'
    },
    {
      id: 6,
      name: 'Industrial'
    },
    {
      id: 7,
      name: 'Chemical'
    },
    {
      id: 8,
      name:
        'Agricultural'
    },
    {
      id: 9,
      name: 'Electrical'
    }
  ];
  let [
    majorId,
    setMajorId
  ] = React.useState();

  return (
    <>
      <ComboBox
        label="Pick a engineering major"
        defaultItems={
          options
        }
        onSelectionChange={
          setMajorId
        }>
        {(item) => (
          <Item>
            {item.name}
          </Item>
        )}
      </ComboBox>
      <p>
        Selected topic
        id: {majorId}
      </p>
    </>
  );
}

Allow custom values#

By default, useComboBoxState doesn't allow users to specify a value that doesn't exist in the list of options and will revert the input value to the current selected value on blur. By specifying allowsCustomValue, this behavior is suppressed and the user is free to enter any value within the field.

<ComboBox label="Favorite Animal" allowsCustomValue>
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox label="Favorite Animal" allowsCustomValue>
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox
  label="Favorite Animal"
  allowsCustomValue>
  <Item key="red panda">
    Red Panda
  </Item>
  <Item key="cat">
    Cat
  </Item>
  <Item key="dog">
    Dog
  </Item>
  <Item key="aardvark">
    Aardvark
  </Item>
  <Item key="kangaroo">
    Kangaroo
  </Item>
  <Item key="snake">
    Snake
  </Item>
</ComboBox>

Custom filtering#

By default, useComboBoxState uses the filter function passed to the defaultFilter prop (in the above example, a "contains" function from useFilter). The filter function can be overridden by users of the ComboBox component by using the items prop to control the filtered list. When items is provided rather than defaultItems, useComboBoxState does no filtering of its own.

The following example makes the inputValue controlled, and updates the filtered list that is passed to the items prop when the input changes value.

function Example() {
  let options = [
    {id: 1, email: 'fake@email.com'},
    {id: 2, email: 'anotherfake@email.com'},
    {id: 3, email: 'bob@email.com'},
    {id: 4, email: 'joe@email.com'},
    {id: 5, email: 'yourEmail@email.com'},
    {id: 6, email: 'valid@email.com'},
    {id: 7, email: 'spam@email.com'},
    {id: 8, email: 'newsletter@email.com'},
    {id: 9, email: 'subscribe@email.com'}
  ];

  let {startsWith} = useFilter({sensitivity: 'base'});
  let [filterValue, setFilterValue] = React.useState('');
  let filteredItems = React.useMemo(
    () => options.filter((item) => startsWith(item.email, filterValue)),
    [options, filterValue]
  );

  return (
    <ComboBox
      label="To:"
      items={filteredItems}
      inputValue={filterValue}
      onInputChange={setFilterValue}
      placeholder="Enter recipient email"
      allowsCustomValue>
      {(item) => <Item>{item.email}</Item>}
    </ComboBox>
  );
}

function Example() {
  let options = [
    {id: 1, email: 'fake@email.com'},
    {id: 2, email: 'anotherfake@email.com'},
    {id: 3, email: 'bob@email.com'},
    {id: 4, email: 'joe@email.com'},
    {id: 5, email: 'yourEmail@email.com'},
    {id: 6, email: 'valid@email.com'},
    {id: 7, email: 'spam@email.com'},
    {id: 8, email: 'newsletter@email.com'},
    {id: 9, email: 'subscribe@email.com'}
  ];

  let {startsWith} = useFilter({sensitivity: 'base'});
  let [filterValue, setFilterValue] = React.useState('');
  let filteredItems = React.useMemo(
    () =>
      options.filter((item) =>
        startsWith(item.email, filterValue)
      ),
    [options, filterValue]
  );

  return (
    <ComboBox
      label="To:"
      items={filteredItems}
      inputValue={filterValue}
      onInputChange={setFilterValue}
      placeholder="Enter recipient email"
      allowsCustomValue>
      {(item) => <Item>{item.email}</Item>}
    </ComboBox>
  );
}

function Example() {
  let options = [
    {
      id: 1,
      email:
        'fake@email.com'
    },
    {
      id: 2,
      email:
        'anotherfake@email.com'
    },
    {
      id: 3,
      email:
        'bob@email.com'
    },
    {
      id: 4,
      email:
        'joe@email.com'
    },
    {
      id: 5,
      email:
        'yourEmail@email.com'
    },
    {
      id: 6,
      email:
        'valid@email.com'
    },
    {
      id: 7,
      email:
        'spam@email.com'
    },
    {
      id: 8,
      email:
        'newsletter@email.com'
    },
    {
      id: 9,
      email:
        'subscribe@email.com'
    }
  ];

  let {
    startsWith
  } = useFilter({
    sensitivity: 'base'
  });
  let [
    filterValue,
    setFilterValue
  ] = React.useState('');
  let filteredItems = React.useMemo(
    () =>
      options.filter(
        (item) =>
          startsWith(
            item.email,
            filterValue
          )
      ),
    [
      options,
      filterValue
    ]
  );

  return (
    <ComboBox
      label="To:"
      items={
        filteredItems
      }
      inputValue={
        filterValue
      }
      onInputChange={
        setFilterValue
      }
      placeholder="Enter recipient email"
      allowsCustomValue>
      {(item) => (
        <Item>
          {item.email}
        </Item>
      )}
    </ComboBox>
  );
}

Fully controlled#

The following example shows how you would create a controlled ComboBox, controlling everything from the selected value (selectedKey) to the combobox options (items). By passing in inputValue, selectedKey, and items to the ComboBox you can control exactly what your ComboBox should display. For example, note that the item filtering for the controlled ComboBox below now follows a "starts with" filter strategy, accomplished by controlling the exact set of items available to the ComboBox whenever the input value updates.

It is important to note that you don't have to control every single aspect of a ComboBox. If you decide to only control a single property of the ComboBox, be sure to provide the change handler for that prop as well e.g. controlling selectedKey would require onSelectionChange to be passed to useComboBox as well.

function ControlledComboBox() {
  let optionList = [
    {name: 'Red Panda', id: '1'},
    {name: 'Cat', id: '2'},
    {name: 'Dog', id: '3'},
    {name: 'Aardvark', id: '4'},
    {name: 'Kangaroo', id: '5'},
    {name: 'Snake', id: '6'}
  ];

  // Store ComboBox input value, selected option, open state, and items
  // in a state tracker
  let [fieldState, setFieldState] = React.useState({
    selectedKey: '',
    inputValue: '',
    items: optionList
  });

  // Implement custom filtering logic and control what items are
  // available to the ComboBox.
  let {startsWith} = useFilter({sensitivity: 'base'});

  // Specify how each of the ComboBox values should change when an
  // option is selected from the list box
  let onSelectionChange = (key) => {
    setFieldState((prevState) => {
      let selectedItem = prevState.items.find((option) => option.id === key);
      return {
        inputValue: selectedItem?.name ?? '',
        selectedKey: key,
        items: optionList.filter((item) =>
          startsWith(item.name, selectedItem?.name ?? '')
        )
      };
    });
  };

  // Specify how each of the ComboBox values should change when the input
  // field is altered by the user
  let onInputChange = (value) => {
    setFieldState((prevState) => ({
      inputValue: value,
      selectedKey: value === '' ? null : prevState.selectedKey,
      items: optionList.filter((item) => startsWith(item.name, value))
    }));
  };

  // Show entire list if user opens the menu manually
  let onOpenChange = (isOpen, menuTrigger) => {
    if (menuTrigger === 'manual' && isOpen) {
      setFieldState((prevState) => ({
        inputValue: prevState.inputValue,
        selectedKey: prevState.selectedKey,
        items: optionList
      }));
    }
  };

  // Pass each controlled prop to useComboBox along with their
  // change handlers
  return (
    <ComboBox
      label="Favorite Animal"
      items={fieldState.items}
      selectedKey={fieldState.selectedKey}
      inputValue={fieldState.inputValue}
      onOpenChange={onOpenChange}
      onSelectionChange={onSelectionChange}
      onInputChange={onInputChange}>
      {(item) => <Item>{item.name}</Item>}
    </ComboBox>
  );
}

<ControlledComboBox />

function ControlledComboBox() {
  let optionList = [
    {name: 'Red Panda', id: '1'},
    {name: 'Cat', id: '2'},
    {name: 'Dog', id: '3'},
    {name: 'Aardvark', id: '4'},
    {name: 'Kangaroo', id: '5'},
    {name: 'Snake', id: '6'}
  ];

  // Store ComboBox input value, selected option, open state, and items
  // in a state tracker
  let [fieldState, setFieldState] = React.useState({
    selectedKey: '',
    inputValue: '',
    items: optionList
  });

  // Implement custom filtering logic and control what items are
  // available to the ComboBox.
  let {startsWith} = useFilter({sensitivity: 'base'});

  // Specify how each of the ComboBox values should change when an
  // option is selected from the list box
  let onSelectionChange = (key) => {
    setFieldState((prevState) => {
      let selectedItem = prevState.items.find(
        (option) => option.id === key
      );
      return {
        inputValue: selectedItem?.name ?? '',
        selectedKey: key,
        items: optionList.filter((item) =>
          startsWith(item.name, selectedItem?.name ?? '')
        )
      };
    });
  };

  // Specify how each of the ComboBox values should change when the input
  // field is altered by the user
  let onInputChange = (value) => {
    setFieldState((prevState) => ({
      inputValue: value,
      selectedKey:
        value === '' ? null : prevState.selectedKey,
      items: optionList.filter((item) =>
        startsWith(item.name, value)
      )
    }));
  };

  // Show entire list if user opens the menu manually
  let onOpenChange = (isOpen, menuTrigger) => {
    if (menuTrigger === 'manual' && isOpen) {
      setFieldState((prevState) => ({
        inputValue: prevState.inputValue,
        selectedKey: prevState.selectedKey,
        items: optionList
      }));
    }
  };

  // Pass each controlled prop to useComboBox along with their
  // change handlers
  return (
    <ComboBox
      label="Favorite Animal"
      items={fieldState.items}
      selectedKey={fieldState.selectedKey}
      inputValue={fieldState.inputValue}
      onOpenChange={onOpenChange}
      onSelectionChange={onSelectionChange}
      onInputChange={onInputChange}>
      {(item) => <Item>{item.name}</Item>}
    </ComboBox>
  );
}

<ControlledComboBox />

function ControlledComboBox() {
  let optionList = [
    {
      name: 'Red Panda',
      id: '1'
    },
    {
      name: 'Cat',
      id: '2'
    },
    {
      name: 'Dog',
      id: '3'
    },
    {
      name: 'Aardvark',
      id: '4'
    },
    {
      name: 'Kangaroo',
      id: '5'
    },
    {
      name: 'Snake',
      id: '6'
    }
  ];

  // Store ComboBox input value, selected option, open state, and items
  // in a state tracker
  let [
    fieldState,
    setFieldState
  ] = React.useState({
    selectedKey: '',
    inputValue: '',
    items: optionList
  });

  // Implement custom filtering logic and control what items are
  // available to the ComboBox.
  let {
    startsWith
  } = useFilter({
    sensitivity: 'base'
  });

  // Specify how each of the ComboBox values should change when an
  // option is selected from the list box
  let onSelectionChange = (
    key
  ) => {
    setFieldState(
      (prevState) => {
        let selectedItem = prevState.items.find(
          (option) =>
            option.id ===
            key
        );
        return {
          inputValue:
            selectedItem?.name ??
            '',
          selectedKey: key,
          items: optionList.filter(
            (item) =>
              startsWith(
                item.name,
                selectedItem?.name ??
                  ''
              )
          )
        };
      }
    );
  };

  // Specify how each of the ComboBox values should change when the input
  // field is altered by the user
  let onInputChange = (
    value
  ) => {
    setFieldState(
      (prevState) => ({
        inputValue: value,
        selectedKey:
          value === ''
            ? null
            : prevState.selectedKey,
        items: optionList.filter(
          (item) =>
            startsWith(
              item.name,
              value
            )
        )
      })
    );
  };

  // Show entire list if user opens the menu manually
  let onOpenChange = (
    isOpen,
    menuTrigger
  ) => {
    if (
      menuTrigger ===
        'manual' &&
      isOpen
    ) {
      setFieldState(
        (prevState) => ({
          inputValue:
            prevState.inputValue,
          selectedKey:
            prevState.selectedKey,
          items: optionList
        })
      );
    }
  };

  // Pass each controlled prop to useComboBox along with their
  // change handlers
  return (
    <ComboBox
      label="Favorite Animal"
      items={
        fieldState.items
      }
      selectedKey={
        fieldState.selectedKey
      }
      inputValue={
        fieldState.inputValue
      }
      onOpenChange={
        onOpenChange
      }
      onSelectionChange={
        onSelectionChange
      }
      onInputChange={
        onInputChange
      }>
      {(item) => (
        <Item>
          {item.name}
        </Item>
      )}
    </ComboBox>
  );
}

<ControlledComboBox />

useComboBoxState supports three different menuTrigger prop values:

input (default): ComboBox menu opens when the user edits the input text.
focus: ComboBox menu opens when the user focuses the ComboBox input.
manual: ComboBox menu only opens when the user presses the trigger button or uses the arrow keys.

The example below has menuTrigger set to focus.

<ComboBox label="Favorite Animal" menuTrigger="focus">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox label="Favorite Animal" menuTrigger="focus">
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox
  label="Favorite Animal"
  menuTrigger="focus">
  <Item key="red panda">
    Red Panda
  </Item>
  <Item key="cat">
    Cat
  </Item>
  <Item key="dog">
    Dog
  </Item>
  <Item key="aardvark">
    Aardvark
  </Item>
  <Item key="kangaroo">
    Kangaroo
  </Item>
  <Item key="snake">
    Snake
  </Item>
</ComboBox>

Disabled options#

You can disable specific options by providing an array of keys to useComboBoxState via the disabledKeys prop. This will prevent options with matching keys from being pressable and receiving keyboard focus as shown in the example below. Note that you are responsible for the styling of disabled options.

<ComboBox label="Favorite Animal" disabledKeys={['cat', 'kangaroo']}>
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox
  label="Favorite Animal"
  disabledKeys={['cat', 'kangaroo']}>
  <Item key="red panda">Red Panda</Item>
  <Item key="cat">Cat</Item>
  <Item key="dog">Dog</Item>
  <Item key="aardvark">Aardvark</Item>
  <Item key="kangaroo">Kangaroo</Item>
  <Item key="snake">Snake</Item>
</ComboBox>

<ComboBox
  label="Favorite Animal"
  disabledKeys={[
    'cat',
    'kangaroo'
  ]}>
  <Item key="red panda">
    Red Panda
  </Item>
  <Item key="cat">
    Cat
  </Item>
  <Item key="dog">
    Dog
  </Item>
  <Item key="aardvark">
    Aardvark
  </Item>
  <Item key="kangaroo">
    Kangaroo
  </Item>
  <Item key="snake">
    Snake
  </Item>
</ComboBox>

Internationalization#

useComboBox handles some aspects of internationalization automatically. For example, the item focus, count, and selection VoiceOver announcements are localized. You are responsible for localizing all labels and option content that is passed into the combo box.

RTL#

In right-to-left languages, the ComboBox should be mirrored. The trigger button should be on the left, and the input element should be on the right. In addition, the content of ComboBox options should flip. Ensure that your CSS accounts for this.

Name	Type	Default	Description
`inputRef`	`RefObject<HTMLInputElement \| HTMLTextAreaElement>`	—	The ref for the input element.
`popoverRef`	`RefObject<HTMLDivElement>`	—	The ref for the list box popover.
`listBoxRef`	`RefObject<HTMLElement>`	—	The ref for the list box.
`buttonRef`	`RefObject<HTMLElement>`	—	The ref for the list box popup trigger button.
`children`	`CollectionChildren<T>`	—	The contents of the collection.
`keyboardDelegate`	`KeyboardDelegate`	—	An optional keyboard delegate implementation, to override the default.
`defaultItems`	`Iterable<T>`	—	The list of ComboBox items (uncontrolled).
`items`	`Iterable<T>`	—	The list of ComboBox items (controlled).
`onOpenChange`	`( (isOpen: boolean, , menuTrigger: MenuTriggerAction )) => void`	—	Method that is called when the open state of the menu changes. Returns the new open state and the action that caused the opening of the menu.
`inputValue`	`string`	—	The value of the ComboBox input (controlled).
`defaultInputValue`	`string`	—	The default value of the ComboBox input (uncontrolled).
`onInputChange`	`( (value: string )) => void`	—	Handler that is called when the ComboBox input value changes.
`allowsCustomValue`	`boolean`	—	Whether the ComboBox allows a non-item matching input value to be set.
`menuTrigger`	`MenuTriggerAction`	`'input'`	The interaction required to display the ComboBox menu.
`shouldFlip`	`boolean`	`true`	Whether the menu should automatically flip direction when space is limited.
`disabledKeys`	`Iterable<Key>`	—	The item keys that are disabled. These items cannot be selected, focused, or otherwise interacted with.
`disallowEmptySelection`	`boolean`	—	Whether the collection allows empty selection.
`selectedKey`	`Key`	—	The currently selected key in the collection (controlled).
`defaultSelectedKey`	`Key`	—	The initial selected key in the collection (uncontrolled).
`onSelectionChange`	`( (key: Key )) => any`	—	Handler that is called when the selection changes.
`isDisabled`	`boolean`	—	Whether the input is disabled.
`isReadOnly`	`boolean`	—	Whether the input can be selected but not changed by the user.
`placeholder`	`string`	—	Temporary text that occupies the text input when it is empty.
`id`	`string`	—	The element's unique identifier. See MDN.
`validationState`	`ValidationState`	—	Whether the input should display its "valid" or "invalid" visual styling.
`isRequired`	`boolean`	—	Whether user input is required on the input before form submission. Often paired with the `necessityIndicator` prop to add a visual indicator to the input.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element loses focus.
`onFocusChange`	`( (isFocused: boolean )) => void`	—	Handler that is called when the element's focus status changes.
`onKeyDown`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is pressed.
`onKeyUp`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is released.

Method	Description
`getKeyBelow( (key: Key )): Key`	Returns the key visually below the given one, or `null` for none.
`getKeyAbove( (key: Key )): Key`	Returns the key visually above the given one, or `null` for none.
`getKeyLeftOf( (key: Key )): Key`	Returns the key visually to the left of the given one, or `null` for none.
`getKeyRightOf( (key: Key )): Key`	Returns the key visually to the right of the given one, or `null` for none.
`getKeyPageBelow( (key: Key )): Key`	Returns the key visually one page below the given one, or `null` for none.
`getKeyPageAbove( (key: Key )): Key`	Returns the key visually one page above the given one, or `null` for none.
`getFirstKey( (key: Key, , global: boolean )): Key`	Returns the first key, or `null` for none.
`getLastKey( (key: Key, , global: boolean )): Key`	Returns the last key, or `null` for none.
`getKeyForSearch( (search: string, , fromKey: Key )): Key`	Returns the next key after `fromKey` that matches the given search string, or `null` for none.

'focus'
  | 'input'
  | 'manual'

CollectionElement<T>
  | CollectionElement<T>[]
  | (
    (item: T
  )) => CollectionElement<T>

SectionElement<T> | ItemElement<T>

ReactElement<SectionProps<T>>

Name	Type	Description
`children`	`ItemElement<T> \| ItemElement<T>[] \| ItemRenderer<T>`	Static child items or a function to render children.
`title`	`ReactNode`	Rendered contents of the section, e.g. a header.
`aria-label`	`string`	An accessibility label for the section.
`items`	`Iterable<T>`	Item objects in the section.

ReactElement<ItemProps<T>>

Name	Type	Description
`children`	`ReactNode`	Rendered contents of the item or child items.
`title`	`ReactNode`	Rendered contents of the item if `children` contains child items.
`textValue`	`string`	A string representation of the item's contents, used for features like typeahead.
`aria-label`	`string`	An accessibility label for this item.
`childItems`	`Iterable<T>`	A list of child item objects. Used for dynamic collections.
`hasChildItems`	`boolean`	Whether this item has children, even if not loaded yet.

(
  (item: T
)) => ItemElement<T>

'valid' | 'invalid'

BaseEvent<ReactKeyboardEvent<any>>

T & {stopPropagation: () => void,
continuePropagation: () => void
}

Properties

Name	Type	Description
`inputValue`	`string`	The current value of the combo box input.
`isFocused`	`boolean`	Whether the select is currently focused.
`selectedKey`	`Key`	The key for the currently selected item.
`selectedItem`	`Node<T>`	The value of the currently selected item.
`collection`	`Collection<Node<T>>`	A collection of items in the list.
`disabledKeys`	`Set<Key>`	A set of items that are disabled.
`selectionManager`	`SelectionManager`	A selection manager to read and update multiple selection state.
`focusStrategy`	`FocusStrategy`	Controls which item will be auto focused when the menu opens.
`isOpen`	`boolean`	Whether the overlay is currently open.

Methods

Method	Description
`setInputValue( (value: string )): void`	Sets the value of the combo box input.
`commit(): void`	Selects the currently focused item and updates the input value.
`open( (focusStrategy: FocusStrategy \| \| null, , trigger: MenuTriggerAction )): void`	Opens the menu.
`toggle( (focusStrategy: FocusStrategy \| \| null, , trigger: MenuTriggerAction )): void`	Toggles the menu.
`revert(): void`	Resets the input value to the previously selected item's text if any and closes the menu.
`setFocused( (isFocused: boolean )): void`	Sets whether the select is focused.
`setSelectedKey( (key: Key )): void`	Sets the selected key.
`close(): void`	Closes the overlay.

'first' | 'last'

Name	Type	Description
`type`	`string`	The type of item this node represents.
`key`	`Key`	A unique key for the node.
`value`	`T`	The object value the node was created from.
`level`	`number`	The level of depth this node is at in the heirarchy.
`hasChildNodes`	`boolean`	Whether this item has children, even if not loaded yet.
`childNodes`	`Iterable<Node<T>>`	The loaded children of this node.
`rendered`	`ReactNode`	The rendered contents of this node (e.g. JSX).
`textValue`	`string`	A string value for this node, used for features like typeahead.
`aria-label`	`string`	An accessibility label for this node.
`index`	`number`	The index of this node within its parent.
`wrapper`	`( (element: ReactElement )) => ReactElement`	A function that should be called to wrap the rendered node.
`parentKey`	`Key`	The key of the parent node.
`prevKey`	`Key`	The key of the node before this node.
`nextKey`	`Key`	The key of the node after this node.
`props`	`any`	Additional properties specific to a particular node type.

A generic interface to access a readonly sequential collection of unique keyed items.

Properties

Name	Type	Description
`size`	`number`	The number of items in the collection.

Methods

Method	Description
`getKeys(): Iterable<Key>`	Iterate over all keys in the collection.
`getItem( (key: Key )): T`	Get an item by its key.
`getKeyBefore( (key: Key )): Key \| null`	Get the key that comes before the given key in the collection.
`getKeyAfter( (key: Key )): Key \| null`	Get the key that comes after the given key in the collection.
`getFirstKey(): Key \| null`	Get the first key in the collection.
`getLastKey(): Key \| null`	Get the last key in the collection.

An interface for reading and updating multiple selection state.

Properties

Name	Type	Description
`selectionMode`	`SelectionMode`	The type of selection that is allowed in the collection.
`disallowEmptySelection`	`boolean`	Whether the collection allows empty selection.
`isFocused`	`boolean`	Whether the collection is currently focused.
`focusedKey`	`Key`	The current focused key in the collection.
`childFocusStrategy`	`FocusStrategy`	Whether the first or last child of the focused key should receive focus.
`selectedKeys`	`Set<Key>`	The currently selected keys in the collection.
`rawSelection`	`Selection`	The raw selection value for the collection. Either 'all' for select all, or a set of keys.
`isEmpty`	`boolean`	Whether the selection is empty.
`isSelectAll`	`boolean`	Whether all items in the collection are selected.
`firstSelectedKey`	`Key \| null`
`lastSelectedKey`	`Key \| null`

Methods

Method	Description
`setFocused( (isFocused: boolean )): void`	Sets whether the collection is focused.
`setFocusedKey( (key: Key, , childFocusStrategy: FocusStrategy )): void`	Sets the focused key.
`isSelected( (key: Key )): void`	Returns whether a key is selected.
`extendSelection( (toKey: Key )): void`	Extends the selection to the given key.
`toggleSelection( (key: Key )): void`	Toggles whether the given key is selected.
`replaceSelection( (key: Key )): void`	Replaces the selection with only the given key.
`setSelectedKeys( (keys: Iterable<Key> )): void`	Replaces the selection with the given keys.
`selectAll(): void`	Selects all items in the collection.
`clearSelection(): void`	Removes all keys from the selection.
`toggleSelectAll(): void`	Toggles between select all and an empty selection.
`select( (key: Key, , e: PressEvent \| \| PointerEvent )): void`
`isSelectionEqual( (selection: Set<Key> )): void`	Returns whether the current selection is equal to the given selection.

Properties

Name	Type	Description
`selectionMode`	`SelectionMode`	The type of selection that is allowed in the collection.
`disallowEmptySelection`	`boolean`	Whether the collection allows empty selection.
`selectedKeys`	`Selection`	The currently selected keys in the collection.
`disabledKeys`	`Set<Key>`	The currently disabled keys in the collection.
`isFocused`	`boolean`	Whether the collection is currently focused.
`focusedKey`	`Key`	The current focused key in the collection.
`childFocusStrategy`	`FocusStrategy`	Whether the first or last child of the focused key should receive focus.

Methods

Method	Description
`setSelectedKeys( (keys: Selection \| \| ( (v: Selection )) => Selection )): void`	Sets the selected keys in the collection.
`setFocused( (isFocused: boolean )): void`	Sets whether the collection is focused.
`setFocusedKey( (key: Key, , child: FocusStrategy )): void`	Sets the focused key, and optionally, whether the first or last child of that key should receive focus.

'none'
  | 'single'
  | 'multiple'

'all' | Set<Key>

Name	Type	Description
`type`	`'pressstart' \| 'pressend' \| 'pressup' \| 'press'`	The type of press event being fired.
`pointerType`	`PointerType`	The pointer type that triggered the press event.
`target`	`HTMLElement`	The target element of the press event.
`shiftKey`	`boolean`	Whether the shift keyboard modifier was held during the press event.
`ctrlKey`	`boolean`	Whether the ctrl keyboard modifier was held during the press event.
`metaKey`	`boolean`	Whether the meta keyboard modifier was held during the press event.

'mouse'
  | 'pen'
  | 'touch'
  | 'keyboard'
  | 'virtual'

Name	Type	Description
`buttonProps`	`AriaButtonProps`	Props for the combo box menu trigger button.
`inputProps`	`InputHTMLAttributes<HTMLInputElement>`	Props for the combo box input element.
`listBoxProps`	`HTMLAttributes<HTMLElement>`	Props for the combo box menu.
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the combo box label element.

Name	Type	Default	Description
`isDisabled`	`boolean`	—	Whether the button is disabled.
`children`	`ReactNode`	—	The content to display in the button.
`onPress`	`( (e: PressEvent )) => void`	—	Handler that is called when the press is released over the target.
`onPressStart`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction starts.
`onPressEnd`	`( (e: PressEvent )) => void`	—	Handler that is called when a press interaction ends, either over the target or when the pointer leaves the target.
`onPressChange`	`( (isPressed: boolean )) => void`	—	Handler that is called when the press state changes.
`onPressUp`	`( (e: PressEvent )) => void`	—	Handler that is called when a press is released over the target, regardless of whether it started on the target or not.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element loses focus.
`onFocusChange`	`( (isFocused: boolean )) => void`	—	Handler that is called when the element's focus status changes.
`onKeyDown`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is pressed.
`onKeyUp`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is released.
`href`	`string`	—	A URL to link to if elementType="a".
`target`	`string`	—	The target window for the link.
`rel`	`string`	—	The relationship between the linked resource and the current page. See MDN.
`elementType`	`T \| JSXElementConstructor<any>`	`'button'`	The HTML element or React element used to render the button, e.g. 'div', 'a', or `RouterLink`.
`aria-expanded`	`boolean`	—	Indicates whether the element, or another grouping element it controls, is currently expanded or collapsed.
`aria-haspopup`	`boolean \| 'menu' \| 'listbox' \| 'tree' \| 'grid' \| 'dialog'`	—	Indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.
`aria-controls`	`string`	—	Identifies the element (or elements) whose contents or presence are controlled by the current element.
`aria-pressed`	`boolean`	—	Indicates the current "pressed" state of toggle buttons.
`type`	`'button' \| 'submit' \| 'reset'`	`'button'`	The behavior of the button when used in an HTML form.
`excludeFromTabOrder`	`boolean`	—	Whether to exclude the element from the sequential tab order. If true, the element will not be focusable via the keyboard by tabbing. This should be avoided except in rare scenarios where an alternative means of accessing the element or its functionality via the keyboard is available.
`id`	`string`	—	The element's unique identifier. See MDN.
`aria-label`	`string`	—	Defines a string value that labels the current element.
`aria-labelledby`	`string`	—	Identifies the element (or elements) that labels the current element.
`aria-describedby`	`string`	—	Identifies the element (or elements) that describes the object.
`aria-details`	`string`	—	Identifies the element (or elements) that provide a detailed, extended description for the object.

Provides state management for a combo box component. Handles building a collection of items from props and manages the option selection state of the combo box. In addition, it tracks the input value, focus state, and other properties of the combo box.

useComboBoxState<T>(
  (props: ComboBoxStateProps<T>
)): ComboBoxState<T>

Name	Type	Default	Description
`children`	`CollectionChildren<T>`	—	The contents of the collection.
`defaultFilter`	`FilterFn`	—	The filter function used to determine if a option should be included in the combo box list.
`allowsEmptyCollection`	`boolean`	—	Whether the combo box allows the menu to be open when the collection is empty.
`shouldCloseOnBlur`	`boolean`	—	Whether the combo box menu should close on blur.
`defaultItems`	`Iterable<T>`	—	The list of ComboBox items (uncontrolled).
`items`	`Iterable<T>`	—	The list of ComboBox items (controlled).
`onOpenChange`	`( (isOpen: boolean, , menuTrigger: MenuTriggerAction )) => void`	—	Method that is called when the open state of the menu changes. Returns the new open state and the action that caused the opening of the menu.
`inputValue`	`string`	—	The value of the ComboBox input (controlled).
`defaultInputValue`	`string`	—	The default value of the ComboBox input (uncontrolled).
`onInputChange`	`( (value: string )) => void`	—	Handler that is called when the ComboBox input value changes.
`allowsCustomValue`	`boolean`	—	Whether the ComboBox allows a non-item matching input value to be set.
`menuTrigger`	`MenuTriggerAction`	`'input'`	The interaction required to display the ComboBox menu.
`shouldFlip`	`boolean`	`true`	Whether the menu should automatically flip direction when space is limited.
`disabledKeys`	`Iterable<Key>`	—	The item keys that are disabled. These items cannot be selected, focused, or otherwise interacted with.
`disallowEmptySelection`	`boolean`	—	Whether the collection allows empty selection.
`selectedKey`	`Key`	—	The currently selected key in the collection (controlled).
`defaultSelectedKey`	`Key`	—	The initial selected key in the collection (uncontrolled).
`onSelectionChange`	`( (key: Key )) => any`	—	Handler that is called when the selection changes.
`isDisabled`	`boolean`	—	Whether the input is disabled.
`isReadOnly`	`boolean`	—	Whether the input can be selected but not changed by the user.
`placeholder`	`string`	—	Temporary text that occupies the text input when it is empty.
`id`	`string`	—	The element's unique identifier. See MDN.
`validationState`	`ValidationState`	—	Whether the input should display its "valid" or "invalid" visual styling.
`isRequired`	`boolean`	—	Whether user input is required on the input before form submission. Often paired with the `necessityIndicator` prop to add a visual indicator to the input.
`autoFocus`	`boolean`	—	Whether the element should receive focus on render.
`onFocus`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element receives focus.
`onBlur`	`( (e: FocusEvent )) => void`	—	Handler that is called when the element loses focus.
`onFocusChange`	`( (isFocused: boolean )) => void`	—	Handler that is called when the element's focus status changes.
`onKeyDown`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is pressed.
`onKeyUp`	`( (e: KeyboardEvent )) => void`	—	Handler that is called when a key is released.

(
  (textValue: string,
  , inputValue: string
)) => boolean

Provides localized string search functionality that is useful for filtering or matching items in a list. Options can be provided to adjust the sensitivity to case, diacritics, and other parameters.

useFilter(
  (options: Intl.CollatorOptions
)): Filter

Method	Description
`startsWith( (string: string, , substring: string )): boolean`	Returns whether a string starts with a given substring.
`endsWith( (string: string, , substring: string )): boolean`	Returns whether a string ends with a given substring.
`contains( (string: string, , substring: string )): boolean`	Returns whether a string contains a given substring.

Provides the behavior and accessibility implementation for a listbox component. A listbox displays a list of options and allows a user to select one or more of them.

useListBox<T>(
  props: AriaListBoxOptions<T>,
  state: ListState<T>,
  ref: RefObject<HTMLElement>
): ListBoxAria

Name	Type	Description
`isVirtualized`	`boolean`	Whether the listbox uses virtual scrolling.
`keyboardDelegate`	`KeyboardDelegate`	An optional keyboard delegate implementation for type to select, to override the default.
`label`	`ReactNode`	An optional visual label for the listbox.
`autoFocus`	`boolean \| FocusStrategy`	Whether to auto focus the listbox or an option.
`shouldFocusWrap`	`boolean`	Whether focus should wrap around when the end/start is reached.
`items`	`Iterable<T>`	Item objects in the collection.
`disabledKeys`	`Iterable<Key>`	The item keys that are disabled. These items cannot be selected, focused, or otherwise interacted with.
`isLoading`	`boolean`	Whether the items are currently loading.
`onLoadMore`	`() => any`	Handler that is called when more items should be loaded, e.g. while scrolling near the bottom.
`selectionMode`	`SelectionMode`	The type of selection that is allowed in the collection.
`disallowEmptySelection`	`boolean`	Whether the collection allows empty selection.
`selectedKeys`	`'all' \| Iterable<Key>`	The currently selected keys in the collection (controlled).
`defaultSelectedKeys`	`'all' \| Iterable<Key>`	The initial selected keys in the collection (uncontrolled).
`onSelectionChange`	`( (keys: Selection )) => any`	Handler that is called when the selection changes.
`id`	`string`	The element's unique identifier. See MDN.
`aria-label`	`string`	Defines a string value that labels the current element.
`aria-labelledby`	`string`	Identifies the element (or elements) that labels the current element.
`aria-describedby`	`string`	Identifies the element (or elements) that describes the object.
`aria-details`	`string`	Identifies the element (or elements) that provide a detailed, extended description for the object.

Name	Type	Description
`collection`	`Collection<Node<T>>`	A collection of items in the list.
`disabledKeys`	`Set<Key>`	A set of items that are disabled.
`selectionManager`	`SelectionManager`	A selection manager to read and update multiple selection state.

Name	Type	Description
`listBoxProps`	`HTMLAttributes<HTMLElement>`	Props for the listbox element.
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the listbox's visual label element (if any).

Provides the behavior and accessibility implementation for an option in a listbox. See useListBox for more details about listboxes.

useOption<T>(
  props: AriaOptionProps,
  state: ListState<T>,
  ref: RefObject<HTMLElement>
): OptionAria

Name	Type	Description
`isDisabled`	`boolean`	Whether the option is disabled.
`isSelected`	`boolean`	Whether the option is selected.
`aria-label`	`string`	A screen reader only label for the option.
`key`	`Key`	The unique key for the option.
`shouldSelectOnPressUp`	`boolean`	Whether selection should occur on press up instead of press down.
`shouldFocusOnHover`	`boolean`	Whether the option should be focused when the user hovers over it.
`isVirtualized`	`boolean`	Whether the option is contained in a virtual scrolling listbox.
`shouldUseVirtualFocus`	`boolean`	Whether the option should use virtual focus instead of being focused directly.

Name	Type	Description
`optionProps`	`HTMLAttributes<HTMLElement>`	Props for the option element.
`labelProps`	`HTMLAttributes<HTMLElement>`	Props for the main text element inside the option.
`descriptionProps`	`HTMLAttributes<HTMLElement>`	Props for the description text element inside the option, if any.

A visually hidden button that can be used to allow screen reader users to dismiss a modal or popup when there is no visual affordance to do so.

Name	Type	Description
`onDismiss`	`() => void`	Called when the dismiss button is activated.

Handles positioning overlays like popovers and menus relative to a trigger element, and updating the position when the window resizes.

useOverlayPosition(
  (props: AriaPositionProps
)): PositionAria

Name	Type	Default	Description
`targetRef`	`RefObject<HTMLElement>`	—	The ref for the element which the overlay positions itself with respect to.
`overlayRef`	`RefObject<HTMLElement>`	—	The ref for the overlay element.
`boundaryElement`	`HTMLElement`	`document.body`	Element that that serves as the positioning boundary.
`scrollRef`	`RefObject<HTMLElement>`	`overlayRef`	A ref for the scrollable region within the overlay.
`shouldUpdatePosition`	`boolean`	`true`	Whether the overlay should update its position automatically.
`onClose`	`() => void`	—	Handler that is called when the overlay should close.
`placement`	`Placement`	`'bottom'`	The placement of the element with respect to its anchor element.
`containerPadding`	`number`	`12`	The placement padding that should be applied between the element and its surrounding container.
`offset`	`number`	`0`	The additional offset applied along the main axis between the element and its anchor element.
`crossOffset`	`number`	`0`	The additional offset applied along the cross axis between the element and its anchor element.
`shouldFlip`	`boolean`	`true`	Whether the element should flip its orientation (e.g. top to bottom or left to right) when there is insufficient room for it to render completely.
`isOpen`	`boolean`	—	Whether the element is rendered.

'bottom'
  | 'bottom left'
  | 'bottom right'
  | 'bottom start'
  | 'bottom end'
  | 'top'
  | 'top left'
  | 'top right'
  | 'top start'
  | 'top end'
  | 'left'
  | 'left top'
  | 'left bottom'
  | 'start'
  | 'start top'
  | 'start bottom'
  | 'right'
  | 'right top'
  | 'right bottom'
  | 'end'
  | 'end top'
  | 'end bottom'

Properties

Name	Type	Description
`overlayProps`	`HTMLAttributes<Element>`	Props for the overlay container element.
`arrowProps`	`HTMLAttributes<Element>`	Props for the overlay tip arrow if any.
`placement`	`PlacementAxis`	Placement of the overlay with respect to the overlay trigger.

Methods

Method	Description
`updatePosition(): void`	Updates the position of the overlay.

Axis | 'center'

'top'
  | 'bottom'
  | 'left'
  | 'right'

useComboBox

API#

Features#

Anatomy#

State management#

Example#

Usage#

Uncontrolled#

Dynamic collections#

Allow custom values#

Custom filtering#

Fully controlled#

Menu trigger behavior#

Disabled options#

Internationalization#

RTL#

Properties

Methods

Properties

Methods

Properties

Methods

Properties

Methods

Properties

Methods