---
title: Autocomplete
subtitle: An input that suggests options as you type.
description: A high-quality, unstyled React autocomplete component that renders an input with a list of filtered options.
---

# Autocomplete

A high-quality, unstyled React autocomplete component that renders an input with a list of filtered options.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleAutocomplete() {
  return (
    <Autocomplete.Root items={tags}>
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Search tags
        <Autocomplete.Input
          placeholder="e.g. feature"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[23rem] max-w-[var(--available-width)] rounded-md bg-[canvas] text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.Empty className="p-4 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No tags found.
            </Autocomplete.Empty>
            <Autocomplete.List className="outline-0 overflow-y-auto scroll-py-[0.5rem] py-2 overscroll-contain max-h-[min(23rem,var(--available-height))] data-[empty]:p-0">
              {(tag: Tag) => (
                <Autocomplete.Item
                  key={tag.id}
                  className="flex cursor-default items-center gap-2 py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded-sm data-[highlighted]:before:bg-gray-900"
                  value={tag}
                >
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: 23rem;
  max-width: var(--available-width);

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.List {
  box-sizing: border-box;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: 0.5rem;
  scroll-padding-block: 0.5rem;
  outline: 0;
  max-height: min(23rem, var(--available-height));

  &[data-empty] {
    padding: 0;
  }
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.Separator {
  margin: 0.375rem 1rem;
  height: 1px;
  background-color: var(--color-gray-200);
}

.Empty:not(:empty) {
  box-sizing: border-box;
  padding: 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
}
```

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleAutocomplete() {
  return (
    <Autocomplete.Root items={tags}>
      <label className={styles.Label}>
        Search tags
        <Autocomplete.Input placeholder="e.g. feature" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>No tags found.</Autocomplete.Empty>
            <Autocomplete.List className={styles.List}>
              {(tag: Tag) => (
                <Autocomplete.Item key={tag.id} className={styles.Item} value={tag}>
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

## Usage guidelines

- **Avoid when selection state is needed**: Use [Combobox](/react/components/combobox.md) instead of Autocomplete if the selection should be remembered and the input value cannot be custom. Unlike Combobox, Autocomplete's input can contain free-form text, as its suggestions only _optionally_ autocomplete the text.
- **Can be used for filterable command pickers**: The input can be used as a filter for command items that perform an action when clicked when rendered inside the popup.
- **Form controls must have an accessible name**: It can be created using a `<label>` element or the `Field` component. See the [forms guide](/react/handbook/forms.md).

## Anatomy

Import the components and place them together:

```jsx title="Anatomy"
import { Autocomplete } from '@base-ui/react/autocomplete';

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

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

        <Autocomplete.Status />
        <Autocomplete.Empty />

        <Autocomplete.List>
          <Autocomplete.Row>
            <Autocomplete.Item />
          </Autocomplete.Row>

          <Autocomplete.Separator />

          <Autocomplete.Group>
            <Autocomplete.GroupLabel />
          </Autocomplete.Group>

          <Autocomplete.Collection />
        </Autocomplete.List>
      </Autocomplete.Popup>
    </Autocomplete.Positioner>
  </Autocomplete.Portal>
</Autocomplete.Root>;
```

## TypeScript inference

Autocomplete infers the item type from the `items` prop passed to `<Autocomplete.Root>`.
If using `itemToStringValue`, the value prop on the `<Autocomplete.Item>` must match the type of an item in the `items` array.

## Examples

### Async search

Load items asynchronously while typing and render custom status content.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleAsyncAutocomplete() {
  const [searchValue, setSearchValue] = React.useState('');
  const [searchResults, setSearchResults] = React.useState<Movie[]>([]);
  const [error, setError] = React.useState<string | null>(null);

  const [isPending, startTransition] = React.useTransition();

  const { contains } = Autocomplete.useFilter();

  const abortControllerRef = React.useRef<AbortController | null>(null);

  function getStatus(): React.ReactNode | null {
    if (isPending) {
      return (
        <React.Fragment>
          <div
            className="size-4 rounded-full border-2 border-gray-200 border-t-gray-600 animate-spin"
            aria-hidden
          />
          Searching…
        </React.Fragment>
      );
    }

    if (error) {
      return error;
    }

    if (searchValue === '') {
      return null;
    }

    if (searchResults.length === 0) {
      return `Movie or year "${searchValue}" does not exist in the Top 100 IMDb movies`;
    }

    return `${searchResults.length} result${searchResults.length === 1 ? '' : 's'} found`;
  }

  const status = getStatus();

  return (
    <Autocomplete.Root
      items={searchResults}
      value={searchValue}
      onValueChange={(nextSearchValue) => {
        setSearchValue(nextSearchValue);

        const controller = new AbortController();
        abortControllerRef.current?.abort();
        abortControllerRef.current = controller;

        if (nextSearchValue === '') {
          setSearchResults([]);
          setError(null);
          return;
        }

        startTransition(async () => {
          setError(null);

          const result = await searchMovies(nextSearchValue, contains);
          if (controller.signal.aborted) {
            return;
          }

          startTransition(() => {
            setSearchResults(result.movies);
            setError(result.error);
          });
        });
      }}
      itemToStringValue={(item) => item.title}
      filter={null}
    >
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Search movies by name or year
        <Autocomplete.Input
          placeholder="e.g. Pulp Fiction or 1994"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal hidden={!status}>
        <Autocomplete.Positioner className="outline-none" sideOffset={4} align="start">
          <Autocomplete.Popup
            className="w-[var(--anchor-width)] max-h-[min(var(--available-height),23rem)] max-w-[var(--available-width)] overflow-y-auto scroll-pt-2 scroll-pb-2 overscroll-contain rounded-md bg-[canvas] py-2 text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300"
            aria-busy={isPending || undefined}
          >
            <Autocomplete.Status>
              {status && (
                <div className="flex items-center gap-2 py-1 pl-4 pr-8 text-sm text-gray-600">
                  {status}
                </div>
              )}
            </Autocomplete.Status>
            <Autocomplete.List>
              {(movie: Movie) => (
                <Autocomplete.Item
                  key={movie.id}
                  className="flex cursor-default py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded data-[highlighted]:before:bg-gray-900"
                  value={movie}
                >
                  <div className="flex w-full flex-col gap-1">
                    <div className="font-medium leading-5">{movie.title}</div>
                    <div className="text-sm leading-4 opacity-80">{movie.year}</div>
                  </div>
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

async function searchMovies(
  query: string,
  filter: (item: string, query: string) => boolean,
): Promise<{ movies: Movie[]; error: string | null }> {
  // Simulate network delay
  await new Promise((resolve) => {
    setTimeout(resolve, Math.random() * 500 + 100);
  });

  // Simulate occasional network errors (1% chance)
  if (Math.random() < 0.01 || query === 'will_error') {
    return {
      movies: [],
      error: 'Failed to fetch movies. Please try again.',
    };
  }

  const movies = top100Movies.filter(
    (movie) => filter(movie.title, query) || filter(movie.year.toString(), query),
  );

  return {
    movies,
    error: null,
  };
}

interface Movie {
  id: string;
  title: string;
  year: number;
}

const top100Movies: Movie[] = [
  { id: '1', title: 'The Shawshank Redemption', year: 1994 },
  { id: '2', title: 'The Godfather', year: 1972 },
  { id: '3', title: 'The Dark Knight', year: 2008 },
  { id: '4', title: 'The Godfather Part II', year: 1974 },
  { id: '5', title: '12 Angry Men', year: 1957 },
  { id: '6', title: 'The Lord of the Rings: The Return of the King', year: 2003 },
  { id: '7', title: "Schindler's List", year: 1993 },
  { id: '8', title: 'Pulp Fiction', year: 1994 },
  { id: '9', title: 'The Lord of the Rings: The Fellowship of the Ring', year: 2001 },
  { id: '10', title: 'The Good, the Bad and the Ugly', year: 1966 },
  { id: '11', title: 'Forrest Gump', year: 1994 },
  { id: '12', title: 'The Lord of the Rings: The Two Towers', year: 2002 },
  { id: '13', title: 'Fight Club', year: 1999 },
  { id: '14', title: 'Inception', year: 2010 },
  { id: '15', title: 'Star Wars: Episode V – The Empire Strikes Back', year: 1980 },
  { id: '16', title: 'The Matrix', year: 1999 },
  { id: '17', title: 'Goodfellas', year: 1990 },
  { id: '18', title: 'Interstellar', year: 2014 },
  { id: '19', title: "One Flew Over the Cuckoo's Nest", year: 1975 },
  { id: '20', title: 'Se7en', year: 1995 },
  { id: '21', title: "It's a Wonderful Life", year: 1946 },
  { id: '22', title: 'The Silence of the Lambs', year: 1991 },
  { id: '23', title: 'Seven Samurai', year: 1954 },
  { id: '24', title: 'Saving Private Ryan', year: 1998 },
  { id: '25', title: 'City of God', year: 2002 },
  { id: '26', title: 'Life Is Beautiful', year: 1997 },
  { id: '27', title: 'The Green Mile', year: 1999 },
  { id: '28', title: 'Star Wars: Episode IV – A New Hope', year: 1977 },
  { id: '29', title: 'Terminator 2: Judgment Day', year: 1991 },
  { id: '30', title: 'Back to the Future', year: 1985 },
  { id: '31', title: 'Spirited Away', year: 2001 },
  { id: '32', title: 'The Pianist', year: 2002 },
  { id: '33', title: 'Psycho', year: 1960 },
  { id: '34', title: 'Parasite', year: 2019 },
  { id: '35', title: 'Gladiator', year: 2000 },
  { id: '36', title: 'Léon: The Professional', year: 1994 },
  { id: '37', title: 'American History X', year: 1998 },
  { id: '38', title: 'The Departed', year: 2006 },
  { id: '39', title: 'Whiplash', year: 2014 },
  { id: '40', title: 'The Prestige', year: 2006 },
  { id: '41', title: 'Grave of the Fireflies', year: 1988 },
  { id: '42', title: 'The Usual Suspects', year: 1995 },
  { id: '43', title: 'Casablanca', year: 1942 },
  { id: '44', title: 'Harakiri', year: 1962 },
  { id: '45', title: 'The Lion King', year: 1994 },
  { id: '46', title: 'The Intouchables', year: 2011 },
  { id: '47', title: 'Modern Times', year: 1936 },
  { id: '48', title: 'The Lives of Others', year: 2006 },
  { id: '49', title: 'Once Upon a Time in the West', year: 1968 },
  { id: '50', title: 'Rear Window', year: 1954 },
  { id: '51', title: 'Alien', year: 1979 },
  { id: '52', title: 'City Lights', year: 1931 },
  { id: '53', title: 'The Shining', year: 1980 },
  { id: '54', title: 'Cinema Paradiso', year: 1988 },
  { id: '55', title: 'Avengers: Infinity War', year: 2018 },
  { id: '56', title: 'Paths of Glory', year: 1957 },
  { id: '57', title: 'Django Unchained', year: 2012 },
  { id: '58', title: 'WALL·E', year: 2008 },
  { id: '59', title: 'Sunset Boulevard', year: 1950 },
  { id: '60', title: 'The Great Dictator', year: 1940 },
  { id: '61', title: 'The Dark Knight Rises', year: 2012 },
  { id: '62', title: 'Princess Mononoke', year: 1997 },
  { id: '63', title: 'Witness for the Prosecution', year: 1957 },
  { id: '64', title: 'Oldboy', year: 2003 },
  { id: '65', title: 'Aliens', year: 1986 },
  { id: '66', title: 'Once Upon a Time in America', year: 1984 },
  { id: '67', title: 'Coco', year: 2017 },
  { id: '68', title: 'Your Name.', year: 2016 },
  { id: '69', title: 'American Beauty', year: 1999 },
  { id: '70', title: 'Braveheart', year: 1995 },
  { id: '71', title: 'Das Boot', year: 1981 },
  { id: '72', title: '3 Idiots', year: 2009 },
  { id: '73', title: 'Toy Story', year: 1995 },
  { id: '74', title: 'Inglourious Basterds', year: 2009 },
  { id: '75', title: 'High and Low', year: 1963 },
  { id: '76', title: 'Amadeus', year: 1984 },
  { id: '77', title: 'Good Will Hunting', year: 1997 },
  { id: '78', title: 'Star Wars: Episode VI – Return of the Jedi', year: 1983 },
  { id: '79', title: 'The Hunt', year: 2012 },
  { id: '80', title: 'Capharnaüm', year: 2018 },
  { id: '81', title: 'Reservoir Dogs', year: 1992 },
  { id: '82', title: 'Eternal Sunshine of the Spotless Mind', year: 2004 },
  { id: '83', title: 'Requiem for a Dream', year: 2000 },
  { id: '84', title: 'Come and See', year: 1985 },
  { id: '85', title: 'Ikiru', year: 1952 },
  { id: '86', title: 'Vertigo', year: 1958 },
  { id: '87', title: 'Lawrence of Arabia', year: 1962 },
  { id: '88', title: 'Citizen Kane', year: 1941 },
  { id: '89', title: 'Memento', year: 2000 },
  { id: '90', title: 'North by Northwest', year: 1959 },
  { id: '91', title: 'Star Wars: Episode III – Revenge of the Sith', year: 2005 },
  { id: '92', title: '2001: A Space Odyssey', year: 1968 },
  { id: '93', title: 'Amélie', year: 2001 },
  { id: '94', title: "Singin' in the Rain", year: 1952 },
  { id: '95', title: 'Apocalypse Now', year: 1979 },
  { id: '96', title: 'Taxi Driver', year: 1976 },
  { id: '97', title: 'Downfall', year: 2004 },
  { id: '98', title: 'The Wolf of Wall Street', year: 2013 },
  { id: '99', title: 'A Clockwork Orange', year: 1971 },
  { id: '100', title: 'Double Indemnity', year: 1944 },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  padding-block: 0.5rem;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: min(var(--available-height), 23rem);
  max-width: var(--available-width);
  overflow-y: auto;
  scroll-padding-block: 0.5rem;
  overscroll-behavior: contain;

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.MovieItem {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  width: 100%;
}

.MovieName {
  font-weight: 500;
  line-height: 1.25rem;
}

.MovieYear {
  font-size: 0.875rem;
  line-height: 1rem;
  opacity: 0.8;
}

.Status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.25rem;
  padding-left: 1rem;
  padding-right: 2rem;
  font-size: 0.875rem;
  text-align: center;
  color: var(--color-gray-600);
}

.Spinner {
  box-sizing: border-box;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--color-gray-200);
  border-top: 2px solid var(--color-gray-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleAsyncAutocomplete() {
  const [searchValue, setSearchValue] = React.useState('');
  const [searchResults, setSearchResults] = React.useState<Movie[]>([]);
  const [error, setError] = React.useState<string | null>(null);

  const [isPending, startTransition] = React.useTransition();

  const { contains } = Autocomplete.useFilter();

  const abortControllerRef = React.useRef<AbortController | null>(null);

  function getStatus(): React.ReactNode | null {
    if (isPending) {
      return (
        <React.Fragment>
          <div className={styles.Spinner} aria-hidden />
          Searching…
        </React.Fragment>
      );
    }

    if (error) {
      return error;
    }

    if (searchValue === '') {
      return null;
    }

    if (searchResults.length === 0) {
      return `Movie or year "${searchValue}" does not exist in the Top 100 IMDb movies`;
    }

    return `${searchResults.length} result${searchResults.length === 1 ? '' : 's'} found`;
  }

  const status = getStatus();

  return (
    <Autocomplete.Root
      items={searchResults}
      value={searchValue}
      onValueChange={(nextSearchValue) => {
        setSearchValue(nextSearchValue);

        const controller = new AbortController();
        abortControllerRef.current?.abort();
        abortControllerRef.current = controller;

        if (nextSearchValue === '') {
          setSearchResults([]);
          setError(null);
          return;
        }

        startTransition(async () => {
          setError(null);

          const result = await searchMovies(nextSearchValue, contains);
          if (controller.signal.aborted) {
            return;
          }

          startTransition(() => {
            setSearchResults(result.movies);
            setError(result.error);
          });
        });
      }}
      itemToStringValue={(item) => item.title}
      filter={null}
    >
      <label className={styles.Label}>
        Search movies by name or year
        <Autocomplete.Input placeholder="e.g. Pulp Fiction or 1994" className={styles.Input} />
      </label>

      <Autocomplete.Portal hidden={!status}>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4} align="start">
          <Autocomplete.Popup className={styles.Popup} aria-busy={isPending || undefined}>
            <Autocomplete.Status>
              {status && <div className={styles.Status}>{status}</div>}
            </Autocomplete.Status>
            <Autocomplete.List>
              {(movie: Movie) => (
                <Autocomplete.Item key={movie.id} className={styles.Item} value={movie}>
                  <div className={styles.MovieItem}>
                    <div className={styles.MovieName}>{movie.title}</div>
                    <div className={styles.MovieYear}>{movie.year}</div>
                  </div>
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

async function searchMovies(
  query: string,
  filter: (item: string, query: string) => boolean,
): Promise<{ movies: Movie[]; error: string | null }> {
  // Simulate network delay
  await new Promise((resolve) => {
    setTimeout(resolve, Math.random() * 500 + 100);
  });

  // Simulate occasional network errors (1% chance)
  if (Math.random() < 0.01 || query === 'will_error') {
    return {
      movies: [],
      error: 'Failed to fetch movies. Please try again.',
    };
  }

  const movies = top100Movies.filter(
    (movie) => filter(movie.title, query) || filter(movie.year.toString(), query),
  );

  return {
    movies,
    error: null,
  };
}

interface Movie {
  id: string;
  title: string;
  year: number;
}

const top100Movies: Movie[] = [
  { id: '1', title: 'The Shawshank Redemption', year: 1994 },
  { id: '2', title: 'The Godfather', year: 1972 },
  { id: '3', title: 'The Dark Knight', year: 2008 },
  { id: '4', title: 'The Godfather Part II', year: 1974 },
  { id: '5', title: '12 Angry Men', year: 1957 },
  { id: '6', title: 'The Lord of the Rings: The Return of the King', year: 2003 },
  { id: '7', title: "Schindler's List", year: 1993 },
  { id: '8', title: 'Pulp Fiction', year: 1994 },
  { id: '9', title: 'The Lord of the Rings: The Fellowship of the Ring', year: 2001 },
  { id: '10', title: 'The Good, the Bad and the Ugly', year: 1966 },
  { id: '11', title: 'Forrest Gump', year: 1994 },
  { id: '12', title: 'The Lord of the Rings: The Two Towers', year: 2002 },
  { id: '13', title: 'Fight Club', year: 1999 },
  { id: '14', title: 'Inception', year: 2010 },
  { id: '15', title: 'Star Wars: Episode V – The Empire Strikes Back', year: 1980 },
  { id: '16', title: 'The Matrix', year: 1999 },
  { id: '17', title: 'Goodfellas', year: 1990 },
  { id: '18', title: 'Interstellar', year: 2014 },
  { id: '19', title: "One Flew Over the Cuckoo's Nest", year: 1975 },
  { id: '20', title: 'Se7en', year: 1995 },
  { id: '21', title: "It's a Wonderful Life", year: 1946 },
  { id: '22', title: 'The Silence of the Lambs', year: 1991 },
  { id: '23', title: 'Seven Samurai', year: 1954 },
  { id: '24', title: 'Saving Private Ryan', year: 1998 },
  { id: '25', title: 'City of God', year: 2002 },
  { id: '26', title: 'Life Is Beautiful', year: 1997 },
  { id: '27', title: 'The Green Mile', year: 1999 },
  { id: '28', title: 'Star Wars: Episode IV – A New Hope', year: 1977 },
  { id: '29', title: 'Terminator 2: Judgment Day', year: 1991 },
  { id: '30', title: 'Back to the Future', year: 1985 },
  { id: '31', title: 'Spirited Away', year: 2001 },
  { id: '32', title: 'The Pianist', year: 2002 },
  { id: '33', title: 'Psycho', year: 1960 },
  { id: '34', title: 'Parasite', year: 2019 },
  { id: '35', title: 'Gladiator', year: 2000 },
  { id: '36', title: 'Léon: The Professional', year: 1994 },
  { id: '37', title: 'American History X', year: 1998 },
  { id: '38', title: 'The Departed', year: 2006 },
  { id: '39', title: 'Whiplash', year: 2014 },
  { id: '40', title: 'The Prestige', year: 2006 },
  { id: '41', title: 'Grave of the Fireflies', year: 1988 },
  { id: '42', title: 'The Usual Suspects', year: 1995 },
  { id: '43', title: 'Casablanca', year: 1942 },
  { id: '44', title: 'Harakiri', year: 1962 },
  { id: '45', title: 'The Lion King', year: 1994 },
  { id: '46', title: 'The Intouchables', year: 2011 },
  { id: '47', title: 'Modern Times', year: 1936 },
  { id: '48', title: 'The Lives of Others', year: 2006 },
  { id: '49', title: 'Once Upon a Time in the West', year: 1968 },
  { id: '50', title: 'Rear Window', year: 1954 },
  { id: '51', title: 'Alien', year: 1979 },
  { id: '52', title: 'City Lights', year: 1931 },
  { id: '53', title: 'The Shining', year: 1980 },
  { id: '54', title: 'Cinema Paradiso', year: 1988 },
  { id: '55', title: 'Avengers: Infinity War', year: 2018 },
  { id: '56', title: 'Paths of Glory', year: 1957 },
  { id: '57', title: 'Django Unchained', year: 2012 },
  { id: '58', title: 'WALL·E', year: 2008 },
  { id: '59', title: 'Sunset Boulevard', year: 1950 },
  { id: '60', title: 'The Great Dictator', year: 1940 },
  { id: '61', title: 'The Dark Knight Rises', year: 2012 },
  { id: '62', title: 'Princess Mononoke', year: 1997 },
  { id: '63', title: 'Witness for the Prosecution', year: 1957 },
  { id: '64', title: 'Oldboy', year: 2003 },
  { id: '65', title: 'Aliens', year: 1986 },
  { id: '66', title: 'Once Upon a Time in America', year: 1984 },
  { id: '67', title: 'Coco', year: 2017 },
  { id: '68', title: 'Your Name.', year: 2016 },
  { id: '69', title: 'American Beauty', year: 1999 },
  { id: '70', title: 'Braveheart', year: 1995 },
  { id: '71', title: 'Das Boot', year: 1981 },
  { id: '72', title: '3 Idiots', year: 2009 },
  { id: '73', title: 'Toy Story', year: 1995 },
  { id: '74', title: 'Inglourious Basterds', year: 2009 },
  { id: '75', title: 'High and Low', year: 1963 },
  { id: '76', title: 'Amadeus', year: 1984 },
  { id: '77', title: 'Good Will Hunting', year: 1997 },
  { id: '78', title: 'Star Wars: Episode VI – Return of the Jedi', year: 1983 },
  { id: '79', title: 'The Hunt', year: 2012 },
  { id: '80', title: 'Capharnaüm', year: 2018 },
  { id: '81', title: 'Reservoir Dogs', year: 1992 },
  { id: '82', title: 'Eternal Sunshine of the Spotless Mind', year: 2004 },
  { id: '83', title: 'Requiem for a Dream', year: 2000 },
  { id: '84', title: 'Come and See', year: 1985 },
  { id: '85', title: 'Ikiru', year: 1952 },
  { id: '86', title: 'Vertigo', year: 1958 },
  { id: '87', title: 'Lawrence of Arabia', year: 1962 },
  { id: '88', title: 'Citizen Kane', year: 1941 },
  { id: '89', title: 'Memento', year: 2000 },
  { id: '90', title: 'North by Northwest', year: 1959 },
  { id: '91', title: 'Star Wars: Episode III – Revenge of the Sith', year: 2005 },
  { id: '92', title: '2001: A Space Odyssey', year: 1968 },
  { id: '93', title: 'Amélie', year: 2001 },
  { id: '94', title: "Singin' in the Rain", year: 1952 },
  { id: '95', title: 'Apocalypse Now', year: 1979 },
  { id: '96', title: 'Taxi Driver', year: 1976 },
  { id: '97', title: 'Downfall', year: 2004 },
  { id: '98', title: 'The Wolf of Wall Street', year: 2013 },
  { id: '99', title: 'A Clockwork Orange', year: 1971 },
  { id: '100', title: 'Double Indemnity', year: 1944 },
];
```

### Inline autocomplete

Autofill the input with the highlighted item while navigating with arrow keys using the `mode` prop. Accepts `aria-autocomplete` values `list`, `both`, `inline`, or `none`.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleAutocompleteInline() {
  return (
    <Autocomplete.Root items={tags} mode="both">
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Search tags
        <Autocomplete.Input
          placeholder="e.g. feature"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none data-[empty]:hidden" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[23rem] max-w-[var(--available-width)] rounded-md bg-[canvas] text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.List className="outline-0 overflow-y-auto scroll-py-[0.5rem] py-2 overscroll-contain max-h-[min(23rem,var(--available-height))] data-[empty]:p-0">
              {(tag: Tag) => (
                <Autocomplete.Item
                  key={tag.id}
                  className="flex cursor-default items-center gap-2 py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded-sm data-[highlighted]:before:bg-gray-900"
                  value={tag}
                >
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;

  &[data-empty] {
    display: none;
  }
}

.Popup {
  box-sizing: border-box;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: 23rem;
  max-width: var(--available-width);

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.List {
  box-sizing: border-box;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: 0.5rem;
  scroll-padding-block: 0.5rem;
  outline: 0;
  max-height: min(23rem, var(--available-height));

  &[data-empty] {
    padding: 0;
  }
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  align-items: center;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}
```

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleAutocompleteInline() {
  return (
    <Autocomplete.Root items={tags} mode="both">
      <label className={styles.Label}>
        Search tags
        <Autocomplete.Input placeholder="e.g. feature" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.List className={styles.List}>
              {(tag: Tag) => (
                <Autocomplete.Item key={tag.id} className={styles.Item} value={tag}>
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### Grouped

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

Groups are represented by an array of objects with an `items` property, which itself is an array of individual items for each group. An extra property, such as `value`, can be provided for the heading text when rendering the group label.

```tsx title="Example" {3,9,13}
interface ProduceGroupItem {
  value: string;
  items: string[];
}

const groups: ProduceGroupItem[] = [
  {
    value: 'Fruits',
    items: ['Apple', 'Banana', 'Orange'],
  },
  {
    value: 'Vegetables',
    items: ['Carrot', 'Lettuce', 'Spinach'],
  },
];
```

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleGroupAutocomplete() {
  return (
    <Autocomplete.Root items={groupedTags}>
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Select a tag
        <Autocomplete.Input
          placeholder="e.g. feature"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[22.5rem] max-w-[var(--available-width)] rounded-lg bg-[canvas] text-gray-900 outline-1 outline-gray-200 shadow-lg shadow-gray-200 dark:outline-gray-300 dark:shadow-none">
            <Autocomplete.Empty className="px-4 py-2 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No tags found.
            </Autocomplete.Empty>
            <Autocomplete.List className="outline-0 overflow-y-auto scroll-pt-[2.25rem] scroll-pb-[0.5rem] overscroll-contain max-h-[min(22.5rem,var(--available-height))] data-[empty]:p-0">
              {(group: TagGroup) => (
                <Autocomplete.Group key={group.value} items={group.items} className="block pb-2">
                  <Autocomplete.GroupLabel className="sticky top-0 z-[1] mb-0 mr-2 mt-0 ml-0 w-[calc(100%-0.5rem)] bg-[canvas] px-4 pb-1 pt-2 text-xs font-semibold uppercase tracking-wider">
                    {group.value}
                  </Autocomplete.GroupLabel>
                  <Autocomplete.Collection>
                    {(tag: Tag) => (
                      <Autocomplete.Item
                        key={tag.id}
                        className="flex cursor-default items-center gap-2 py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded-sm data-[highlighted]:before:bg-gray-900"
                        value={tag}
                      >
                        {tag.label}
                      </Autocomplete.Item>
                    )}
                  </Autocomplete.Collection>
                </Autocomplete.Group>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  label: string;
  group: 'Type' | 'Component';
}

interface TagGroup {
  value: string;
  items: Tag[];
}

const tagsData: Tag[] = [
  { id: 't1', label: 'feature', group: 'Type' },
  { id: 't2', label: 'fix', group: 'Type' },
  { id: 't3', label: 'bug', group: 'Type' },
  { id: 't4', label: 'docs', group: 'Type' },
  { id: 't5', label: 'internal', group: 'Type' },
  { id: 't6', label: 'mobile', group: 'Type' },
  { id: 'c-accordion', label: 'component: accordion', group: 'Component' },
  { id: 'c-alert-dialog', label: 'component: alert dialog', group: 'Component' },
  { id: 'c-autocomplete', label: 'component: autocomplete', group: 'Component' },
  { id: 'c-avatar', label: 'component: avatar', group: 'Component' },
  { id: 'c-checkbox', label: 'component: checkbox', group: 'Component' },
  { id: 'c-checkbox-group', label: 'component: checkbox group', group: 'Component' },
  { id: 'c-collapsible', label: 'component: collapsible', group: 'Component' },
  { id: 'c-combobox', label: 'component: combobox', group: 'Component' },
  { id: 'c-context-menu', label: 'component: context menu', group: 'Component' },
  { id: 'c-dialog', label: 'component: dialog', group: 'Component' },
  { id: 'c-field', label: 'component: field', group: 'Component' },
  { id: 'c-fieldset', label: 'component: fieldset', group: 'Component' },
  { id: 'c-filterable-menu', label: 'component: filterable menu', group: 'Component' },
  { id: 'c-form', label: 'component: form', group: 'Component' },
  { id: 'c-input', label: 'component: input', group: 'Component' },
  { id: 'c-menu', label: 'component: menu', group: 'Component' },
  { id: 'c-menubar', label: 'component: menubar', group: 'Component' },
  { id: 'c-meter', label: 'component: meter', group: 'Component' },
  { id: 'c-navigation-menu', label: 'component: navigation menu', group: 'Component' },
  { id: 'c-number-field', label: 'component: number field', group: 'Component' },
  { id: 'c-popover', label: 'component: popover', group: 'Component' },
  { id: 'c-preview-card', label: 'component: preview card', group: 'Component' },
  { id: 'c-progress', label: 'component: progress', group: 'Component' },
  { id: 'c-radio', label: 'component: radio', group: 'Component' },
  { id: 'c-scroll-area', label: 'component: scroll area', group: 'Component' },
  { id: 'c-select', label: 'component: select', group: 'Component' },
  { id: 'c-separator', label: 'component: separator', group: 'Component' },
  { id: 'c-slider', label: 'component: slider', group: 'Component' },
  { id: 'c-switch', label: 'component: switch', group: 'Component' },
  { id: 'c-tabs', label: 'component: tabs', group: 'Component' },
  { id: 'c-toast', label: 'component: toast', group: 'Component' },
  { id: 'c-toggle', label: 'component: toggle', group: 'Component' },
  { id: 'c-toggle-group', label: 'component: toggle group', group: 'Component' },
  { id: 'c-toolbar', label: 'component: toolbar', group: 'Component' },
  { id: 'c-tooltip', label: 'component: tooltip', group: 'Component' },
];

function groupTags(tags: Tag[]): TagGroup[] {
  const groups: { [key: string]: Tag[] } = {};
  tags.forEach((t) => {
    (groups[t.group] ??= []).push(t);
  });
  const order = ['Type', 'Component'];
  return order.map((value) => ({ value, items: groups[value] ?? [] }));
}

const groupedTags: TagGroup[] = groupTags(tagsData);
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  border-radius: 0.5rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: 22.5rem;
  max-width: var(--available-width);

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
  }
}

.List {
  box-sizing: border-box;
  overflow-y: auto;
  scroll-padding-top: 2.25rem;
  scroll-padding-bottom: 0.5rem;
  overscroll-behavior: contain;
  max-height: min(22.5rem, var(--available-height));
  outline: 0;

  &[data-empty] {
    padding: 0;
  }
}

.Group {
  display: block;
  padding-bottom: 0.5rem;
}

.GroupLabel {
  box-sizing: border-box;
  padding: 0.5rem 1rem 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  background-color: canvas;
  position: sticky;
  z-index: 1;
  top: 0;
  margin: 0 0.5rem 0 0;
  width: calc(100% - 0.5rem);
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding: 0.5rem 2rem 0.5rem 1rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.Separator {
  margin: 0.375rem 1rem;
  height: 1px;
  background-color: var(--color-gray-200);
}

.Empty:not(:empty) {
  box-sizing: border-box;
  padding: 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
}
```

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleGroupAutocomplete() {
  return (
    <Autocomplete.Root items={groupedTags}>
      <label className={styles.Label}>
        Select a tag
        <Autocomplete.Input placeholder="e.g. feature" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>No tags found.</Autocomplete.Empty>
            <Autocomplete.List className={styles.List}>
              {(group: TagGroup) => (
                <Autocomplete.Group key={group.value} items={group.items} className={styles.Group}>
                  <Autocomplete.GroupLabel className={styles.GroupLabel}>
                    {group.value}
                  </Autocomplete.GroupLabel>
                  <Autocomplete.Collection>
                    {(tag: Tag) => (
                      <Autocomplete.Item key={tag.id} className={styles.Item} value={tag}>
                        {tag.label}
                      </Autocomplete.Item>
                    )}
                  </Autocomplete.Collection>
                </Autocomplete.Group>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  label: string;
  group: 'Type' | 'Component';
}

interface TagGroup {
  value: string;
  items: Tag[];
}

const tagsData: Tag[] = [
  { id: 't1', label: 'feature', group: 'Type' },
  { id: 't2', label: 'fix', group: 'Type' },
  { id: 't3', label: 'bug', group: 'Type' },
  { id: 't4', label: 'docs', group: 'Type' },
  { id: 't5', label: 'internal', group: 'Type' },
  { id: 't6', label: 'mobile', group: 'Type' },
  { id: 'c-accordion', label: 'component: accordion', group: 'Component' },
  { id: 'c-alert-dialog', label: 'component: alert dialog', group: 'Component' },
  { id: 'c-autocomplete', label: 'component: autocomplete', group: 'Component' },
  { id: 'c-avatar', label: 'component: avatar', group: 'Component' },
  { id: 'c-checkbox', label: 'component: checkbox', group: 'Component' },
  { id: 'c-checkbox-group', label: 'component: checkbox group', group: 'Component' },
  { id: 'c-collapsible', label: 'component: collapsible', group: 'Component' },
  { id: 'c-combobox', label: 'component: combobox', group: 'Component' },
  { id: 'c-context-menu', label: 'component: context menu', group: 'Component' },
  { id: 'c-dialog', label: 'component: dialog', group: 'Component' },
  { id: 'c-field', label: 'component: field', group: 'Component' },
  { id: 'c-fieldset', label: 'component: fieldset', group: 'Component' },
  { id: 'c-filterable-menu', label: 'component: filterable menu', group: 'Component' },
  { id: 'c-form', label: 'component: form', group: 'Component' },
  { id: 'c-input', label: 'component: input', group: 'Component' },
  { id: 'c-menu', label: 'component: menu', group: 'Component' },
  { id: 'c-menubar', label: 'component: menubar', group: 'Component' },
  { id: 'c-meter', label: 'component: meter', group: 'Component' },
  { id: 'c-navigation-menu', label: 'component: navigation menu', group: 'Component' },
  { id: 'c-number-field', label: 'component: number field', group: 'Component' },
  { id: 'c-popover', label: 'component: popover', group: 'Component' },
  { id: 'c-preview-card', label: 'component: preview card', group: 'Component' },
  { id: 'c-progress', label: 'component: progress', group: 'Component' },
  { id: 'c-radio', label: 'component: radio', group: 'Component' },
  { id: 'c-scroll-area', label: 'component: scroll area', group: 'Component' },
  { id: 'c-select', label: 'component: select', group: 'Component' },
  { id: 'c-separator', label: 'component: separator', group: 'Component' },
  { id: 'c-slider', label: 'component: slider', group: 'Component' },
  { id: 'c-switch', label: 'component: switch', group: 'Component' },
  { id: 'c-tabs', label: 'component: tabs', group: 'Component' },
  { id: 'c-toast', label: 'component: toast', group: 'Component' },
  { id: 'c-toggle', label: 'component: toggle', group: 'Component' },
  { id: 'c-toggle-group', label: 'component: toggle group', group: 'Component' },
  { id: 'c-toolbar', label: 'component: toolbar', group: 'Component' },
  { id: 'c-tooltip', label: 'component: tooltip', group: 'Component' },
];

function groupTags(tags: Tag[]): TagGroup[] {
  const groups: { [key: string]: Tag[] } = {};
  tags.forEach((t) => {
    (groups[t.group] ??= []).push(t);
  });
  const order = ['Type', 'Component'];
  return order.map((value) => ({ value, items: groups[value] ?? [] }));
}

const groupedTags: TagGroup[] = groupTags(tagsData);
```

### Fuzzy matching

Use fuzzy matching to find relevant results even when the query doesn't exactly match the item text.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { matchSorter } from 'match-sorter';

export default function ExampleFuzzyMatchingAutocomplete() {
  return (
    <Autocomplete.Root
      items={fuzzyItems}
      filter={fuzzyFilter}
      itemToStringValue={(item) => item.title}
    >
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Fuzzy search documentation
        <Autocomplete.Input
          placeholder="e.g. React"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[min(var(--available-height),28rem)] max-w-[var(--available-width)] overflow-y-auto scroll-pt-2 scroll-pb-2 overscroll-contain rounded-md bg-[canvas] py-2 text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.Empty className="px-4 py-2 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No results found for "{<Autocomplete.Value />}"
            </Autocomplete.Empty>

            <Autocomplete.List className="flex flex-col">
              {(item: FuzzyItem) => (
                <Autocomplete.Item
                  key={item.title}
                  value={item}
                  className="flex cursor-default py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded data-[highlighted]:before:bg-gray-200"
                >
                  <Autocomplete.Value>
                    {(value) => (
                      <div className="flex w-full flex-col gap-1">
                        <div className="flex items-center justify-between gap-3">
                          <div className="flex-1 font-medium leading-5">
                            {highlightText(item.title, value)}
                          </div>
                        </div>
                        <div className="text-sm leading-5 text-gray-600">
                          {highlightText(item.description, value)}
                        </div>
                      </div>
                    )}
                  </Autocomplete.Value>
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

function highlightText(text: string, query: string): React.ReactNode {
  const trimmed = query.trim();
  if (!trimmed) {
    return text;
  }

  const limited = trimmed.slice(0, 100);
  const escaped = limited.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
  const regex = new RegExp(`(${escaped})`, 'gi');

  return text.split(regex).map((part, idx) =>
    regex.test(part) ? (
      <mark key={idx} className="text-blue-800 bg-transparent font-bold">
        {part}
      </mark>
    ) : (
      part
    ),
  );
}

function fuzzyFilter(item: FuzzyItem, query: string): boolean {
  if (!query) {
    return true;
  }

  const results = matchSorter([item], query, {
    keys: [
      'title',
      'description',
      'category',
      { key: 'title', threshold: matchSorter.rankings.CONTAINS },
      { key: 'description', threshold: matchSorter.rankings.WORD_STARTS_WITH },
    ],
  });

  return results.length > 0;
}

interface FuzzyItem {
  title: string;
  description: string;
  category: string;
}

const fuzzyItems: FuzzyItem[] = [
  {
    title: 'React Hooks Guide',
    description: 'Learn how to use React Hooks like useState, useEffect, and custom hooks',
    category: 'React',
  },
  {
    title: 'JavaScript Array Methods',
    description: 'Master array methods like map, filter, reduce, and forEach in JavaScript',
    category: 'JavaScript',
  },
  {
    title: 'CSS Flexbox Layout',
    description: 'Complete guide to CSS Flexbox for responsive web design',
    category: 'CSS',
  },
  {
    title: 'TypeScript Interfaces',
    description: 'Understanding TypeScript interfaces and type definitions',
    category: 'TypeScript',
  },
  {
    title: 'React Performance Optimization',
    description: 'Tips and techniques for optimizing React application performance',
    category: 'React',
  },
  {
    title: 'HTML Semantic Elements',
    description: 'Using semantic HTML elements for better accessibility and SEO',
    category: 'HTML',
  },
  {
    title: 'Node.js Express Server',
    description: 'Building RESTful APIs with Node.js and Express framework',
    category: 'Node.js',
  },
  {
    title: 'Vue Composition API',
    description: 'Modern Vue.js development using the Composition API',
    category: 'Vue.js',
  },
  {
    title: 'Angular Components',
    description: 'Creating reusable Angular components with TypeScript',
    category: 'Angular',
  },
  {
    title: 'Python Django Framework',
    description: 'Web development with Python Django framework',
    category: 'Python',
  },
  {
    title: 'CSS Grid Layout',
    description: 'Advanced CSS Grid techniques for complex layouts',
    category: 'CSS',
  },
  {
    title: 'React Testing Library',
    description: 'Testing React components with React Testing Library',
    category: 'React',
  },
  {
    title: 'MongoDB Queries',
    description: 'Advanced MongoDB queries and aggregation pipelines',
    category: 'Database',
  },
  {
    title: 'Webpack Configuration',
    description: 'Optimizing Webpack configuration for production builds',
    category: 'Build Tools',
  },
  {
    title: 'SASS/SCSS Guide',
    description: 'Writing maintainable CSS with SASS and SCSS',
    category: 'CSS',
  },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  @media (min-width: 500px) {
    width: 20rem;
  }

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  padding-block: 0.5rem;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: min(var(--available-height), 28rem);
  max-width: var(--available-width);
  overflow-y: auto;
  scroll-padding-block: 0.5rem;
  overscroll-behavior: contain;

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.List {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding: 0.75rem 1rem;
  display: flex;
  font-size: 1rem;
  line-height: 1.5rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-200);
  }
}

.ItemContent {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  width: 100%;
}

.ItemHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.ItemTitle {
  font-weight: 500;
  line-height: 1.25rem;
  flex: 1;
}

.ItemDescription {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.25rem;
}

.Empty:not(:empty) {
  box-sizing: border-box;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
  padding: 0.5rem 1rem;
}

.Item mark {
  background-color: transparent;
  color: var(--color-blue);
  font-weight: 600;
}

.ItemCategory mark {
  color: var(--color-blue);
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { matchSorter } from 'match-sorter';
import styles from './index.module.css';

export default function ExampleFuzzyMatchingAutocomplete() {
  return (
    <Autocomplete.Root
      items={fuzzyItems}
      filter={fuzzyFilter}
      itemToStringValue={(item) => item.title}
    >
      <label className={styles.Label}>
        Fuzzy search documentation
        <Autocomplete.Input placeholder="e.g. React" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>
              No results found for "{<Autocomplete.Value />}"
            </Autocomplete.Empty>

            <Autocomplete.List className={styles.List}>
              {(item: FuzzyItem) => (
                <Autocomplete.Item key={item.title} value={item} className={styles.Item}>
                  <Autocomplete.Value>
                    {(value) => (
                      <div className={styles.ItemContent}>
                        <div className={styles.ItemHeader}>
                          <div className={styles.ItemTitle}>{highlightText(item.title, value)}</div>
                        </div>
                        <div className={styles.ItemDescription}>
                          {highlightText(item.description, value)}
                        </div>
                      </div>
                    )}
                  </Autocomplete.Value>
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

function highlightText(text: string, query: string): React.ReactNode {
  const trimmed = query.trim();
  if (!trimmed) {
    return text;
  }

  const limited = trimmed.slice(0, 100);
  const escaped = limited.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
  const regex = new RegExp(`(${escaped})`, 'gi');

  return text
    .split(regex)
    .map((part, idx) => (regex.test(part) ? <mark key={idx}>{part}</mark> : part));
}

function fuzzyFilter(item: FuzzyItem, query: string): boolean {
  if (!query) {
    return true;
  }

  const results = matchSorter([item], query, {
    keys: [
      'title',
      'description',
      'category',
      { key: 'title', threshold: matchSorter.rankings.CONTAINS },
      { key: 'description', threshold: matchSorter.rankings.WORD_STARTS_WITH },
    ],
  });

  return results.length > 0;
}

interface FuzzyItem {
  title: string;
  description: string;
  category: string;
}

const fuzzyItems: FuzzyItem[] = [
  {
    title: 'React Hooks Guide',
    description: 'Learn how to use React Hooks like useState, useEffect, and custom hooks',
    category: 'React',
  },
  {
    title: 'JavaScript Array Methods',
    description: 'Master array methods like map, filter, reduce, and forEach in JavaScript',
    category: 'JavaScript',
  },
  {
    title: 'CSS Flexbox Layout',
    description: 'Complete guide to CSS Flexbox for responsive web design',
    category: 'CSS',
  },
  {
    title: 'TypeScript Interfaces',
    description: 'Understanding TypeScript interfaces and type definitions',
    category: 'TypeScript',
  },
  {
    title: 'React Performance Optimization',
    description: 'Tips and techniques for optimizing React application performance',
    category: 'React',
  },
  {
    title: 'HTML Semantic Elements',
    description: 'Using semantic HTML elements for better accessibility and SEO',
    category: 'HTML',
  },
  {
    title: 'Node.js Express Server',
    description: 'Building RESTful APIs with Node.js and Express framework',
    category: 'Node.js',
  },
  {
    title: 'Vue Composition API',
    description: 'Modern Vue.js development using the Composition API',
    category: 'Vue.js',
  },
  {
    title: 'Angular Components',
    description: 'Creating reusable Angular components with TypeScript',
    category: 'Angular',
  },
  {
    title: 'Python Django Framework',
    description: 'Web development with Python Django framework',
    category: 'Python',
  },
  {
    title: 'CSS Grid Layout',
    description: 'Advanced CSS Grid techniques for complex layouts',
    category: 'CSS',
  },
  {
    title: 'React Testing Library',
    description: 'Testing React components with React Testing Library',
    category: 'React',
  },
  {
    title: 'MongoDB Queries',
    description: 'Advanced MongoDB queries and aggregation pipelines',
    category: 'Database',
  },
  {
    title: 'Webpack Configuration',
    description: 'Optimizing Webpack configuration for production builds',
    category: 'Build Tools',
  },
  {
    title: 'SASS/SCSS Guide',
    description: 'Writing maintainable CSS with SASS and SCSS',
    category: 'CSS',
  },
];
```

### Limit results

Limit the number of visible items using the `limit` prop and guide users to refine their query using `<Autocomplete.Status>`.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';

const limit = 8;

export default function ExampleAutocompleteLimit() {
  const [value, setValue] = React.useState('');

  const { contains } = Autocomplete.useFilter({ sensitivity: 'base' });

  const totalMatches = React.useMemo(() => {
    const trimmed = value.trim();
    if (!trimmed) {
      return tags.length;
    }
    return tags.filter((t) => contains(t.value, trimmed)).length;
  }, [value, contains]);

  const moreCount = Math.max(0, totalMatches - limit);

  return (
    <Autocomplete.Root items={tags} value={value} onValueChange={setValue} limit={limit}>
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Limit results to 8
        <Autocomplete.Input
          placeholder="e.g. component"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[min(var(--available-height),23rem)] max-w-[var(--available-width)] overflow-y-auto scroll-pt-2 scroll-pb-2 overscroll-contain rounded-md bg-[canvas] py-2 text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.Empty className="px-4 py-2 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No results found for "{value}"
            </Autocomplete.Empty>

            <Autocomplete.List>
              {(tag: Tag) => (
                <Autocomplete.Item
                  key={tag.id}
                  className="flex cursor-default py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded data-[highlighted]:before:bg-gray-900"
                  value={tag}
                >
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>

            <Autocomplete.Status className="mt-1 px-4 py-2 text-sm leading-5 text-gray-600 empty:m-0 empty:p-0">
              {moreCount > 0
                ? `Hiding ${moreCount} results (type a more specific query to narrow results)`
                : null}
            </Autocomplete.Status>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

// Larger dataset to make the limit visible.
const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 't7', value: 'frontend' },
  { id: 't8', value: 'backend' },
  { id: 't9', value: 'performance' },
  { id: 't10', value: 'accessibility' },
  { id: 't11', value: 'design' },
  { id: 't12', value: 'research' },
  { id: 't13', value: 'testing' },
  { id: 't14', value: 'infrastructure' },
  { id: 't15', value: 'documentation' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  padding-block: 0.5rem;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: min(var(--available-height), 23rem);
  max-width: var(--available-width);
  overflow-y: auto;
  scroll-padding-block: 0.5rem;
  overscroll-behavior: contain;

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.Empty:not(:empty) {
  box-sizing: border-box;
  padding: 0.5rem 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
}

.Status:not(:empty) {
  box-sizing: border-box;
  margin-top: 0.25rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--color-gray-600);
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

const limit = 8;

export default function ExampleAutocompleteLimit() {
  const [value, setValue] = React.useState('');

  const { contains } = Autocomplete.useFilter({ sensitivity: 'base' });

  const totalMatches = React.useMemo(() => {
    const trimmed = value.trim();
    if (!trimmed) {
      return tags.length;
    }
    return tags.filter((t) => contains(t.value, trimmed)).length;
  }, [value, contains]);

  const moreCount = Math.max(0, totalMatches - limit);

  return (
    <Autocomplete.Root items={tags} value={value} onValueChange={setValue} limit={limit}>
      <label className={styles.Label}>
        Limit results to 8
        <Autocomplete.Input placeholder="e.g. component" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>
              No results found for "{value}"
            </Autocomplete.Empty>

            <Autocomplete.List>
              {(tag: Tag) => (
                <Autocomplete.Item key={tag.id} className={styles.Item} value={tag}>
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>

            <Autocomplete.Status className={styles.Status}>
              {moreCount > 0
                ? `Hiding ${moreCount} results (type a more specific query to narrow results)`
                : null}
            </Autocomplete.Status>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

// Larger dataset to make the limit visible.
const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 't7', value: 'frontend' },
  { id: 't8', value: 'backend' },
  { id: 't9', value: 'performance' },
  { id: 't10', value: 'accessibility' },
  { id: 't11', value: 'design' },
  { id: 't12', value: 'research' },
  { id: 't13', value: 'testing' },
  { id: 't14', value: 'infrastructure' },
  { id: 't15', value: 'documentation' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### Auto highlight

The first matching item can be automatically highlighted as the user types by specifying the `autoHighlight` prop on `<Autocomplete.Root>`. Set the prop's value to `"always"` if the highlight should always be present, such as when the list is rendered inline within a dialog.

The prop can be combined with the `keepHighlight` and `highlightItemOnHover` props to configure how the highlight behaves during mouse interactions.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleAutocompleteAutoHighlight() {
  return (
    <Autocomplete.Root items={tags} autoHighlight>
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Auto highlight on type
        <Autocomplete.Input
          placeholder="e.g. feature"
          className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
        />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[23rem] max-w-[var(--available-width)] rounded-md bg-[canvas] text-gray-900 shadow-lg shadow-gray-200 outline-1 outline-gray-200 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.Empty className="p-4 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No tags found.
            </Autocomplete.Empty>
            <Autocomplete.List className="outline-0 overflow-y-auto scroll-py-[0.5rem] py-2 overscroll-contain max-h-[min(23rem,var(--available-height))] data-[empty]:p-0">
              {(tag: Tag) => (
                <Autocomplete.Item
                  key={tag.id}
                  className="flex cursor-default items-center gap-2 py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded-sm data-[highlighted]:before:bg-gray-900"
                  value={tag}
                >
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: 23rem;
  max-width: var(--available-width);

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.List {
  box-sizing: border-box;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: 0.5rem;
  scroll-padding-block: 0.5rem;
  outline: 0;
  max-height: min(23rem, var(--available-height));

  &[data-empty] {
    padding: 0;
  }
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.Empty:not(:empty) {
  box-sizing: border-box;
  padding: 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
}
```

```tsx
/* index.tsx */
'use client';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleAutocompleteAutoHighlight() {
  return (
    <Autocomplete.Root items={tags} autoHighlight>
      <label className={styles.Label}>
        Auto highlight on type
        <Autocomplete.Input placeholder="e.g. feature" className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>No tags found.</Autocomplete.Empty>
            <Autocomplete.List className={styles.List}>
              {(tag: Tag) => (
                <Autocomplete.Item key={tag.id} className={styles.Item} value={tag}>
                  {tag.value}
                </Autocomplete.Item>
              )}
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

interface Tag {
  id: string;
  value: string;
}

const tags: Tag[] = [
  { id: 't1', value: 'feature' },
  { id: 't2', value: 'fix' },
  { id: 't3', value: 'bug' },
  { id: 't4', value: 'docs' },
  { id: 't5', value: 'internal' },
  { id: 't6', value: 'mobile' },
  { id: 'c-accordion', value: 'component: accordion' },
  { id: 'c-alert-dialog', value: 'component: alert dialog' },
  { id: 'c-autocomplete', value: 'component: autocomplete' },
  { id: 'c-avatar', value: 'component: avatar' },
  { id: 'c-checkbox', value: 'component: checkbox' },
  { id: 'c-checkbox-group', value: 'component: checkbox group' },
  { id: 'c-collapsible', value: 'component: collapsible' },
  { id: 'c-combobox', value: 'component: combobox' },
  { id: 'c-context-menu', value: 'component: context menu' },
  { id: 'c-dialog', value: 'component: dialog' },
  { id: 'c-field', value: 'component: field' },
  { id: 'c-fieldset', value: 'component: fieldset' },
  { id: 'c-filterable-menu', value: 'component: filterable menu' },
  { id: 'c-form', value: 'component: form' },
  { id: 'c-input', value: 'component: input' },
  { id: 'c-menu', value: 'component: menu' },
  { id: 'c-menubar', value: 'component: menubar' },
  { id: 'c-meter', value: 'component: meter' },
  { id: 'c-navigation-menu', value: 'component: navigation menu' },
  { id: 'c-number-field', value: 'component: number field' },
  { id: 'c-popover', value: 'component: popover' },
  { id: 'c-preview-card', value: 'component: preview card' },
  { id: 'c-progress', value: 'component: progress' },
  { id: 'c-radio', value: 'component: radio' },
  { id: 'c-scroll-area', value: 'component: scroll area' },
  { id: 'c-select', value: 'component: select' },
  { id: 'c-separator', value: 'component: separator' },
  { id: 'c-slider', value: 'component: slider' },
  { id: 'c-switch', value: 'component: switch' },
  { id: 'c-tabs', value: 'component: tabs' },
  { id: 'c-toast', value: 'component: toast' },
  { id: 'c-toggle', value: 'component: toggle' },
  { id: 'c-toggle-group', value: 'component: toggle group' },
  { id: 'c-toolbar', value: 'component: toolbar' },
  { id: 'c-tooltip', value: 'component: tooltip' },
];
```

### Command palette

Use the autocomplete input to filter a list of command items that perform an action when clicked.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { Dialog } from '@base-ui/react/dialog';
import { ScrollArea } from '@base-ui/react/scroll-area';

export default function ExampleAutocompleteCommandPalette() {
  const [open, setOpen] = React.useState(false);

  function handleItemClick() {
    setOpen(false);
  }

  return (
    <Dialog.Root open={open} onOpenChange={setOpen}>
      <Dialog.Trigger className="flex h-10 cursor-default items-center justify-center rounded-md border border-gray-200 bg-gray-50 px-3.5 text-base font-medium text-gray-900 select-none hover:bg-gray-100 focus-visible:outline focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 active:bg-gray-100">
        Open command palette
      </Dialog.Trigger>
      <Dialog.Portal>
        <Dialog.Backdrop className="fixed inset-0 bg-black opacity-20 transition-opacity duration-150 ease-[cubic-bezier(0.45,1.005,0,1.005)] data-[ending-style]:opacity-0 data-[starting-style]:opacity-0 dark:opacity-70 supports-[-webkit-touch-callout:none]:absolute" />
        <Dialog.Viewport className="fixed inset-0 flex items-start justify-center overflow-hidden px-2 pt-18 pb-2">
          <Dialog.Popup
            className="relative flex max-h-[min(36rem,calc(100dvh-5rem))] w-[calc(100vw-1rem)] max-w-[28rem] flex-col overflow-hidden rounded-2xl bg-white text-gray-900 outline-1 outline-black/4 shadow-[0_.5px_1px_hsl(0_0%_0%/12%),0_1px_3px_-1px_hsl(0_0%_0%/4%),0_2px_4px_-1px_hsl(0_0%_0%/4%),0_4px_8px_-2px_hsl(0_0%_0%/4%),0_12px_14px_-4px_hsl(0_0%_0%/4%),0_24px_64px_-8px_hsl(0_0%_0%/4%),0_40px_48px_-32px_hsl(0_0%_0%/4%)] transition-[opacity,transform,scale,translate] duration-150 data-ending-style:-translate-y-4 data-ending-style:scale-95 data-ending-style:opacity-0 data-starting-style:-translate-y-4 data-starting-style:scale-95 data-starting-style:opacity-0 dark:bg-[oklch(20%_0.5%_264deg)] dark:outline-white/25"
            aria-label="Command palette"
          >
            <Autocomplete.Root
              open
              inline
              items={groupedItems}
              autoHighlight="always"
              keepHighlight
            >
              <Autocomplete.Input
                className="w-full border-0 border-b border-gray-100 bg-transparent p-4 text-base tracking-[0.016em] text-gray-900 placeholder:text-gray-500 outline-none"
                placeholder="Search for apps and commands..."
              />
              <Dialog.Close className="sr-only">Close command palette</Dialog.Close>

              <ScrollArea.Root className="relative flex max-h-[min(60dvh,24rem)] min-h-0 flex-[0_1_auto] overflow-hidden">
                <ScrollArea.Viewport className="min-h-0 flex-1 overscroll-contain [scroll-padding-block:0.25rem] focus-visible:outline focus-visible:outline-1 focus-visible:-outline-offset-1 focus-visible:outline-blue-800">
                  <ScrollArea.Content style={{ minWidth: '100%' }}>
                    <Autocomplete.Empty className="flex min-h-32 items-center justify-center p-4 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:min-h-0 empty:p-0">
                      No results found.
                    </Autocomplete.Empty>

                    <Autocomplete.List className="p-2">
                      {(group: Group) => (
                        <Autocomplete.Group
                          key={group.value}
                          items={group.items}
                          className="not-last:mb-1"
                        >
                          <Autocomplete.GroupLabel className="m-0 flex h-8 items-center px-3.5 text-[0.9375rem] tracking-[0.00625em] font-normal leading-none text-gray-600 select-none outline-none">
                            {group.value}
                          </Autocomplete.GroupLabel>
                          <Autocomplete.Collection>
                            {(item: Item) => (
                              <Autocomplete.Item
                                key={item.value}
                                value={item}
                                onClick={handleItemClick}
                                className="grid min-h-8 cursor-default grid-cols-[minmax(0,1fr)_auto] items-center gap-2 rounded-md pl-9 pr-3 text-[0.9375rem] tracking-[0.016em] font-normal leading-[1.25] select-none outline-none [scroll-margin-block:0.25rem] data-[highlighted]:bg-gray-100"
                              >
                                <span className="truncate font-normal">{item.label}</span>
                                <span className="shrink-0 whitespace-nowrap text-[0.875rem] tracking-[0.00625em] text-gray-500 data-[highlighted]:text-gray-700">
                                  {group.value === 'Suggestions' ? 'Application' : 'Command'}
                                </span>
                              </Autocomplete.Item>
                            )}
                          </Autocomplete.Collection>
                        </Autocomplete.Group>
                      )}
                    </Autocomplete.List>
                  </ScrollArea.Content>
                </ScrollArea.Viewport>
                <ScrollArea.Scrollbar className="-mr-1 flex w-6 justify-center py-2">
                  <ScrollArea.Thumb className="flex w-full justify-center before:block before:h-full before:w-1 before:rounded-sm before:bg-gray-400 before:content-['']" />
                </ScrollArea.Scrollbar>
              </ScrollArea.Root>

              <div className="flex items-center justify-between border-t border-gray-100 bg-white px-3 py-2.5 text-xs text-gray-500">
                <div className="flex items-center gap-2">
                  <span>Activate</span>
                  <kbd className="inline-flex h-5 min-w-5 items-center justify-center rounded border border-gray-300 bg-gray-50 px-1 text-[0.625rem] font-medium text-gray-600">
                    Enter
                  </kbd>
                </div>
                <div className="flex items-center gap-2">
                  <span>Actions</span>
                  <kbd className="inline-flex h-5 min-w-5 items-center justify-center rounded border border-gray-300 bg-gray-50 px-1 text-[0.625rem] font-medium text-gray-600">
                    Cmd
                  </kbd>
                  <kbd className="inline-flex h-5 min-w-5 items-center justify-center rounded border border-gray-300 bg-gray-50 px-1 text-[0.625rem] font-medium text-gray-600">
                    K
                  </kbd>
                </div>
              </div>
            </Autocomplete.Root>
          </Dialog.Popup>
        </Dialog.Viewport>
      </Dialog.Portal>
    </Dialog.Root>
  );
}

interface Item {
  value: string;
  label: string;
}

interface Group {
  value: string;
  items: Item[];
}

const suggestions: Item[] = [
  { value: 'linear', label: 'Linear' },
  { value: 'figma', label: 'Figma' },
  { value: 'slack', label: 'Slack' },
  { value: 'youtube', label: 'YouTube' },
  { value: 'raycast', label: 'Raycast' },
  { value: 'notion', label: 'Notion' },
  { value: 'github', label: 'GitHub' },
  { value: 'jira', label: 'Jira' },
  { value: 'calendar', label: 'Google Calendar' },
  { value: 'chrome', label: 'Google Chrome' },
  { value: 'mail', label: 'Apple Mail' },
  { value: 'terminal', label: 'Terminal' },
];

const commands: Item[] = [
  { value: 'clipboard-history', label: 'Clipboard History' },
  { value: 'import-extension', label: 'Import Extension' },
  { value: 'create-snippet', label: 'Create Snippet' },
  { value: 'system-preferences', label: 'System Preferences' },
  { value: 'window-management', label: 'Window Management' },
  { value: 'toggle-dark-mode', label: 'Toggle Dark Mode' },
  { value: 'new-window', label: 'New Window' },
  { value: 'new-tab', label: 'New Tab' },
  { value: 'search-docs', label: 'Search Documentation' },
  { value: 'capture-screen', label: 'Capture Screenshot' },
  { value: 'close-sidebar', label: 'Toggle Sidebar' },
  { value: 'toggle-terminal', label: 'Toggle Integrated Terminal' },
  { value: 'run-script', label: 'Run Script' },
];

const groupedItems: Group[] = [
  { value: 'Suggestions', items: suggestions },
  { value: 'Commands', items: commands },
];
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Button {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 2.5rem;
  padding: 0 0.875rem;
  margin: 0;
  outline: 0;
  border: 1px solid var(--color-gray-200);
  border-radius: 0.375rem;
  background-color: var(--color-gray-50);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5rem;
  color: var(--color-gray-900);
  user-select: none;
  cursor: default;

  @media (hover: hover) {
    &:hover {
      background-color: var(--color-gray-100);
    }
  }

  &:active {
    background-color: var(--color-gray-100);
  }

  &:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: -1px;
  }
}

.Backdrop {
  position: fixed;
  inset: 0;
  background-color: black;
  opacity: 0.2;
  transition: opacity 150ms cubic-bezier(0.45, 1.005, 0, 1.005);

  @media (prefers-color-scheme: dark) {
    opacity: 0.7;
  }

  &[data-starting-style],
  &[data-ending-style] {
    opacity: 0;
  }
}

.Viewport {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 4.5rem 0.5rem 0.5rem;
  overflow: hidden;
}

.Popup {
  box-sizing: border-box;
  position: relative;
  width: calc(100vw - 1rem);
  max-width: 28rem;
  border-radius: 1rem;
  background-color: white;
  color: var(--color-gray-900);
  transition:
    transform 150ms,
    opacity 150ms;
  max-height: min(36rem, calc(100dvh - 5rem));
  display: flex;
  flex-direction: column;
  overflow: hidden;

  &[data-starting-style],
  &[data-ending-style] {
    opacity: 0;
    transform: translateY(-1rem) scale(0.95);
  }

  outline: 1px solid rgb(0 0 0 / 0.04);
  box-shadow:
    0 0.5px 1px rgb(0 0 0 / 0.12),
    0 1px 3px -1px rgb(0 0 0 / 0.04),
    0 2px 4px -1px rgb(0 0 0 / 0.04),
    0 4px 8px -2px rgb(0 0 0 / 0.04),
    0 12px 14px -4px rgb(0 0 0 / 0.04),
    0 24px 64px -8px rgb(0 0 0 / 0.04),
    0 40px 48px -32px rgb(0 0 0 / 0.04);

  @media (prefers-color-scheme: dark) {
    background-color: oklch(20% 0.5% 264deg);
    outline: 1px solid rgb(255 255 255 / 0.25);
  }
}

.Input {
  box-sizing: border-box;
  padding: 1rem;
  margin: 0;
  border: none;
  border-bottom: 1px solid var(--color-gray-100);
  width: 100%;
  height: auto;
  border-radius: 0;
  font-family: inherit;
  font-size: 1rem;
  background-color: transparent;
  color: var(--color-gray-900);
  letter-spacing: 0.016em;
  outline: none;

  &::placeholder {
    color: var(--color-gray-500);
  }

  &:focus {
    border-bottom-color: var(--color-gray-100);
    outline: none;
  }
}

.ListArea {
  position: relative;
  display: flex;
  flex: 0 1 auto;
  min-height: 0;
  max-height: min(60dvh, 24rem);
  overflow: hidden;
}

.ListViewport {
  box-sizing: border-box;
  flex: 1 1 auto;
  min-height: 0;
  overscroll-behavior: contain;
  scroll-padding-block: 0.25rem;

  &:focus-visible {
    outline: 1px solid var(--color-blue);
    outline-offset: -1px;
  }
}

.List {
  box-sizing: border-box;
  padding: 0.5rem;

  &:empty {
    padding: 0;
  }
}

.ListContent {
  min-width: 100%;
}

.Group:not(:last-child) {
  margin-block-end: 0.25rem;
}

.GroupLabel {
  outline: 0;
  cursor: default;
  user-select: none;
  display: flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.875rem;
  font-size: 0.9375rem;
  letter-spacing: 0.00625em;
  line-height: 1;
  font-weight: 400;
  color: var(--color-gray-600);
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  scroll-margin-block: 0.25rem;
  min-height: 2rem;
  padding: 0 0.75rem 0 2.25rem;
  border-radius: 0.375rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.9375rem;
  letter-spacing: 0.016em;
  line-height: 1.25;
  font-weight: 400;

  &[data-highlighted] {
    background-color: var(--color-gray-100);
  }
}

.ItemLabel {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 400;
}

.ItemType {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  letter-spacing: 0.00625em;
  white-space: nowrap;

  [data-highlighted] & {
    color: var(--color-gray-700);
  }
}

.Empty:not(:empty) {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
  min-height: 8rem;
}

.Scrollbar {
  display: flex;
  justify-content: center;
  width: 1.5rem;
  margin-right: -0.25rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.ScrollbarThumb {
  display: flex;
  justify-content: center;
  width: 100%;

  &::before {
    content: '';
    display: block;
    height: 100%;
    width: 0.25rem;
    border-radius: var(--radius-sm);
    background-color: var(--color-gray-400);
  }
}

.Footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 0.75rem;
  border-top: 1px solid var(--color-gray-100);
  font-size: 0.75rem;
  color: var(--color-gray-500);
  background-color: white;
  border-radius: 0 0 1rem 1rem;
}

.FooterLeft,
.FooterRight {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.Kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 0.25rem;
  font-size: 0.625rem;
  font-family:
    ui-monospace, SFMono-Regular, 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  font-weight: 500;
  line-height: 1;
  color: var(--color-gray-600);
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-300);
  border-radius: 0.25rem;
}

.VisuallyHiddenClose {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Dialog } from '@base-ui/react/dialog';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { ScrollArea } from '@base-ui/react/scroll-area';
import styles from './index.module.css';

export default function ExampleAutocompleteCommandPalette() {
  const [open, setOpen] = React.useState(false);

  function handleItemClick() {
    setOpen(false);
  }

  return (
    <Dialog.Root open={open} onOpenChange={setOpen}>
      <Dialog.Trigger className={styles.Button}>Open command palette</Dialog.Trigger>
      <Dialog.Portal>
        <Dialog.Backdrop className={styles.Backdrop} />
        <Dialog.Viewport className={styles.Viewport}>
          <Dialog.Popup className={styles.Popup} aria-label="Command palette">
            <Autocomplete.Root
              open
              inline
              items={groupedItems}
              autoHighlight="always"
              keepHighlight
            >
              <Autocomplete.Input
                className={styles.Input}
                placeholder="Search for apps and commands..."
              />
              <Dialog.Close className={styles.VisuallyHiddenClose}>
                Close command palette
              </Dialog.Close>

              <ScrollArea.Root className={styles.ListArea}>
                <ScrollArea.Viewport className={styles.ListViewport}>
                  <ScrollArea.Content className={styles.ListContent}>
                    <Autocomplete.Empty className={styles.Empty}>
                      No results found.
                    </Autocomplete.Empty>

                    <Autocomplete.List className={styles.List}>
                      {(group: Group) => (
                        <Autocomplete.Group
                          key={group.value}
                          items={group.items}
                          className={styles.Group}
                        >
                          <Autocomplete.GroupLabel className={styles.GroupLabel}>
                            {group.value}
                          </Autocomplete.GroupLabel>
                          <Autocomplete.Collection>
                            {(item: Item) => (
                              <Autocomplete.Item
                                key={item.value}
                                value={item}
                                className={styles.Item}
                                onClick={handleItemClick}
                              >
                                <span className={styles.ItemLabel}>{item.label}</span>
                                <span className={styles.ItemType}>
                                  {group.value === 'Suggestions' ? 'Application' : 'Command'}
                                </span>
                              </Autocomplete.Item>
                            )}
                          </Autocomplete.Collection>
                        </Autocomplete.Group>
                      )}
                    </Autocomplete.List>
                  </ScrollArea.Content>
                </ScrollArea.Viewport>
                <ScrollArea.Scrollbar className={styles.Scrollbar}>
                  <ScrollArea.Thumb className={styles.ScrollbarThumb} />
                </ScrollArea.Scrollbar>
              </ScrollArea.Root>

              <div className={styles.Footer}>
                <div className={styles.FooterLeft}>
                  <span>Activate</span>
                  <kbd className={styles.Kbd}>Enter</kbd>
                </div>
                <div className={styles.FooterRight}>
                  <span>Actions</span>
                  <kbd className={styles.Kbd}>Cmd</kbd>
                  <kbd className={styles.Kbd}>K</kbd>
                </div>
              </div>
            </Autocomplete.Root>
          </Dialog.Popup>
        </Dialog.Viewport>
      </Dialog.Portal>
    </Dialog.Root>
  );
}

interface Item {
  value: string;
  label: string;
}

interface Group {
  value: string;
  items: Item[];
}

const suggestions: Item[] = [
  { value: 'linear', label: 'Linear' },
  { value: 'figma', label: 'Figma' },
  { value: 'slack', label: 'Slack' },
  { value: 'youtube', label: 'YouTube' },
  { value: 'raycast', label: 'Raycast' },
  { value: 'notion', label: 'Notion' },
  { value: 'github', label: 'GitHub' },
  { value: 'jira', label: 'Jira' },
  { value: 'calendar', label: 'Google Calendar' },
  { value: 'chrome', label: 'Google Chrome' },
  { value: 'mail', label: 'Apple Mail' },
  { value: 'terminal', label: 'Terminal' },
];

const commands: Item[] = [
  { value: 'clipboard-history', label: 'Clipboard History' },
  { value: 'import-extension', label: 'Import Extension' },
  { value: 'create-snippet', label: 'Create Snippet' },
  { value: 'system-preferences', label: 'System Preferences' },
  { value: 'window-management', label: 'Window Management' },
  { value: 'toggle-dark-mode', label: 'Toggle Dark Mode' },
  { value: 'new-window', label: 'New Window' },
  { value: 'new-tab', label: 'New Tab' },
  { value: 'search-docs', label: 'Search Documentation' },
  { value: 'capture-screen', label: 'Capture Screenshot' },
  { value: 'close-sidebar', label: 'Toggle Sidebar' },
  { value: 'toggle-terminal', label: 'Toggle Integrated Terminal' },
  { value: 'run-script', label: 'Run Script' },
];

const groupedItems: Group[] = [
  { value: 'Suggestions', items: suggestions },
  { value: 'Commands', items: commands },
];
```

### Grid layout

Display items in a grid layout, wrapping each row in `<Autocomplete.Row>` components.

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';

export default function ExampleEmojiPicker() {
  const [pickerOpen, setPickerOpen] = React.useState(false);
  const [textValue, setTextValue] = React.useState('');
  const [searchValue, setSearchValue] = React.useState('');

  const textInputRef = React.useRef<HTMLInputElement | null>(null);

  function handleInsertEmoji(value: string | null) {
    if (!value || !textInputRef.current) {
      return;
    }

    const emoji = value;
    const start = textInputRef.current.selectionStart ?? textInputRef.current.value.length ?? 0;
    const end = textInputRef.current.selectionEnd ?? textInputRef.current.value.length ?? 0;

    setTextValue((prev) => prev.slice(0, start) + emoji + prev.slice(end));
    setPickerOpen(false);

    const input = textInputRef.current;
    if (input) {
      input.focus();
      const caretPos = start + emoji.length;
      input.setSelectionRange(caretPos, caretPos);
    }
  }

  return (
    <div className="mx-auto w-[16rem]">
      <div className="flex items-center gap-2">
        <input
          ref={textInputRef}
          type="text"
          className="h-10 flex-1 font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
          placeholder="iMessage"
          value={textValue}
          onChange={(event) => setTextValue(event.target.value)}
        />

        <Autocomplete.Root
          items={emojiGroups}
          grid
          open={pickerOpen}
          onOpenChange={setPickerOpen}
          onOpenChangeComplete={() => setSearchValue('')}
          value={searchValue}
          onValueChange={(value, details) => {
            if (details.reason !== 'item-press') {
              setSearchValue(value);
            }
          }}
        >
          <Autocomplete.Trigger
            className="size-10 rounded-md border border-gray-200 bg-[canvas] text-[1.25rem] text-gray-900 outline-none hover:bg-gray-100 focus-visible:outline focus-visible:outline-2 focus-visible:-outline-offset-1 focus-visible:outline-blue-800 data-[popup-open]:bg-gray-100"
            aria-label="Choose emoji"
          >
            😀
          </Autocomplete.Trigger>
          <Autocomplete.Portal>
            <Autocomplete.Positioner className="outline-none" sideOffset={4} align="end">
              <Autocomplete.Popup className="[--input-container-height:3rem] max-w-[var(--available-width)] max-h-[20.5rem] origin-[var(--transform-origin)] rounded-lg bg-[canvas] shadow-lg shadow-gray-200 text-gray-900 outline-1 outline-gray-200 transition-[transform,scale,opacity] data-[ending-style]:scale-90 data-[ending-style]:opacity-0 data-[starting-style]:scale-90 data-[starting-style]:opacity-0 dark:shadow-none dark:-outline-offset-1 dark:outline-gray-300">
                <div className="mx-1 flex h-[var(--input-container-height)] w-64 items-center justify-center bg-[canvas] text-center">
                  <Autocomplete.Input
                    placeholder="Search emojis…"
                    className="h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800"
                  />
                </div>
                <Autocomplete.Empty className="px-4 pb-4 pt-2 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
                  No emojis found
                </Autocomplete.Empty>
                <Autocomplete.List className="max-h-[min(calc(20.5rem-var(--input-container-height)),calc(var(--available-height)-var(--input-container-height)))] overflow-auto scroll-pt-10 scroll-pb-[0.35rem] overscroll-contain">
                  {(group: EmojiGroup) => (
                    <Autocomplete.Group key={group.value} items={group.items} className="block">
                      <Autocomplete.GroupLabel className="sticky top-0 z-[1] m-0 w-full border-b border-gray-100 bg-[canvas] px-4 pb-1 pt-2 text-[0.75rem] font-semibold uppercase tracking-wide text-gray-600">
                        {group.label}
                      </Autocomplete.GroupLabel>
                      <div className="p-1" role="presentation">
                        {chunkArray(group.items, COLUMNS).map((row, rowIdx) => (
                          <Autocomplete.Row key={rowIdx} className="grid grid-cols-5">
                            {row.map((rowItem) => (
                              <Autocomplete.Item
                                key={rowItem.emoji}
                                value={rowItem}
                                className="group min-w-[var(--anchor-width)] select-none flex h-10 flex-col items-center justify-center rounded-md bg-transparent px-0.5 py-2 text-gray-900 outline-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded-md data-[highlighted]:before:bg-gray-200"
                                onClick={() => {
                                  handleInsertEmoji(rowItem.emoji);
                                  setPickerOpen(false);
                                }}
                              >
                                <span className="mb-1 text-[1.5rem] leading-none">
                                  {rowItem.emoji}
                                </span>
                              </Autocomplete.Item>
                            ))}
                          </Autocomplete.Row>
                        ))}
                      </div>
                    </Autocomplete.Group>
                  )}
                </Autocomplete.List>
              </Autocomplete.Popup>
            </Autocomplete.Positioner>
          </Autocomplete.Portal>
        </Autocomplete.Root>
      </div>
    </div>
  );
}

const COLUMNS = 5;

function chunkArray<T>(array: T[], size: number): T[][] {
  const result: T[][] = [];
  for (let i = 0; i < array.length; i += size) {
    result.push(array.slice(i, i + size));
  }
  return result;
}

interface EmojiItem {
  emoji: string;
  value: string;
  name: string;
}

interface EmojiGroup {
  value: string;
  label: string;
  items: EmojiItem[];
}

export const emojiCategories = [
  {
    label: 'Smileys & Emotion',
    emojis: [
      { emoji: '😀', name: 'grinning face' },
      { emoji: '😃', name: 'grinning face with big eyes' },
      { emoji: '😄', name: 'grinning face with smiling eyes' },
      { emoji: '😁', name: 'beaming face with smiling eyes' },
      { emoji: '😆', name: 'grinning squinting face' },
      { emoji: '😅', name: 'grinning face with sweat' },
      { emoji: '🤣', name: 'rolling on the floor laughing' },
      { emoji: '😂', name: 'face with tears of joy' },
      { emoji: '🙂', name: 'slightly smiling face' },
      { emoji: '🙃', name: 'upside-down face' },
      { emoji: '😉', name: 'winking face' },
      { emoji: '😊', name: 'smiling face with smiling eyes' },
      { emoji: '😇', name: 'smiling face with halo' },
      { emoji: '🥰', name: 'smiling face with hearts' },
      { emoji: '😍', name: 'smiling face with heart-eyes' },
      { emoji: '🤩', name: 'star-struck' },
      { emoji: '😘', name: 'face blowing a kiss' },
      { emoji: '😗', name: 'kissing face' },
      { emoji: '☺️', name: 'smiling face' },
      { emoji: '😚', name: 'kissing face with closed eyes' },
      { emoji: '😙', name: 'kissing face with smiling eyes' },
      { emoji: '🥲', name: 'smiling face with tear' },
      { emoji: '😋', name: 'face savoring food' },
      { emoji: '😛', name: 'face with tongue' },
      { emoji: '😜', name: 'winking face with tongue' },
      { emoji: '🤪', name: 'zany face' },
      { emoji: '😝', name: 'squinting face with tongue' },
      { emoji: '🤑', name: 'money-mouth face' },
      { emoji: '🤗', name: 'hugging face' },
      { emoji: '🤭', name: 'face with hand over mouth' },
    ],
  },
  {
    label: 'Animals & Nature',
    emojis: [
      { emoji: '🐶', name: 'dog face' },
      { emoji: '🐱', name: 'cat face' },
      { emoji: '🐭', name: 'mouse face' },
      { emoji: '🐹', name: 'hamster' },
      { emoji: '🐰', name: 'rabbit face' },
      { emoji: '🦊', name: 'fox' },
      { emoji: '🐻', name: 'bear' },
      { emoji: '🐼', name: 'panda' },
      { emoji: '🐨', name: 'koala' },
      { emoji: '🐯', name: 'tiger face' },
      { emoji: '🦁', name: 'lion' },
      { emoji: '🐮', name: 'cow face' },
      { emoji: '🐷', name: 'pig face' },
      { emoji: '🐽', name: 'pig nose' },
      { emoji: '🐸', name: 'frog' },
      { emoji: '🐵', name: 'monkey face' },
      { emoji: '🙈', name: 'see-no-evil monkey' },
      { emoji: '🙉', name: 'hear-no-evil monkey' },
      { emoji: '🙊', name: 'speak-no-evil monkey' },
      { emoji: '🐒', name: 'monkey' },
      { emoji: '🐔', name: 'chicken' },
      { emoji: '🐧', name: 'penguin' },
      { emoji: '🐦', name: 'bird' },
      { emoji: '🐤', name: 'baby chick' },
      { emoji: '🐣', name: 'hatching chick' },
      { emoji: '🐥', name: 'front-facing baby chick' },
      { emoji: '🦆', name: 'duck' },
      { emoji: '🦅', name: 'eagle' },
      { emoji: '🦉', name: 'owl' },
      { emoji: '🦇', name: 'bat' },
    ],
  },
  {
    label: 'Food & Drink',
    emojis: [
      { emoji: '🍎', name: 'red apple' },
      { emoji: '🍏', name: 'green apple' },
      { emoji: '🍊', name: 'tangerine' },
      { emoji: '🍋', name: 'lemon' },
      { emoji: '🍌', name: 'banana' },
      { emoji: '🍉', name: 'watermelon' },
      { emoji: '🍇', name: 'grapes' },
      { emoji: '🍓', name: 'strawberry' },
      { emoji: '🫐', name: 'blueberries' },
      { emoji: '🍈', name: 'melon' },
      { emoji: '🍒', name: 'cherries' },
      { emoji: '🍑', name: 'peach' },
      { emoji: '🥭', name: 'mango' },
      { emoji: '🍍', name: 'pineapple' },
      { emoji: '🥥', name: 'coconut' },
      { emoji: '🥝', name: 'kiwi fruit' },
      { emoji: '🍅', name: 'tomato' },
      { emoji: '🍆', name: 'eggplant' },
      { emoji: '🥑', name: 'avocado' },
      { emoji: '🥦', name: 'broccoli' },
      { emoji: '🥬', name: 'leafy greens' },
      { emoji: '🥒', name: 'cucumber' },
      { emoji: '🌶️', name: 'hot pepper' },
      { emoji: '🫑', name: 'bell pepper' },
      { emoji: '🌽', name: 'ear of corn' },
      { emoji: '🥕', name: 'carrot' },
      { emoji: '🫒', name: 'olive' },
      { emoji: '🧄', name: 'garlic' },
      { emoji: '🧅', name: 'onion' },
      { emoji: '🥔', name: 'potato' },
    ],
  },
];

const emojiGroups: EmojiGroup[] = emojiCategories.map((category) => ({
  value: category.label,
  label: category.label,
  items: category.emojis.map((emoji) => ({
    ...emoji,
    value: emoji.name.toLowerCase(),
  })),
}));
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Container {
  width: 16rem;
  margin: 0 auto;
}

.InputGroup {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.TextInput {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  flex: 1;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }
}

.EmojiButton {
  box-sizing: border-box;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-gray-200);
  border-radius: 0.375rem;
  background-color: canvas;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-gray-900);
  outline: none;

  &:hover {
    background-color: var(--color-gray-100);
  }

  &:focus-visible {
    border-color: var(--color-blue);
    outline: 2px solid var(--color-blue);
    outline-offset: -1px;
  }

  &[data-popup-open] {
    background-color: var(--color-gray-100);
  }
}

.Trigger {
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  height: 2.5rem;
  padding-left: 0.875rem;
  padding-right: 0.75rem;
  margin: 0;
  outline: 0;
  border: 1px solid var(--color-gray-200);
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5rem;
  color: var(--color-gray-900);
  cursor: default;
  -webkit-user-select: none;
  user-select: none;
  min-width: 9rem;
  background-color: canvas;

  @media (hover: hover) {
    &:hover {
      background-color: var(--color-gray-100);
    }
  }

  &[data-popup-open] {
    background-color: var(--color-gray-100);
  }

  &:focus-visible {
    outline: 2px solid var(--color-blue);
    outline-offset: -1px;
  }
}

.TriggerIcon {
  display: flex;
}

.InputContainer {
  box-sizing: border-box;
  width: 16rem;
  height: calc(var(--input-container-height));
  text-align: center;
  background: canvas;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 0.25rem;
}

.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-300);
  width: 100%;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }
}

.Positioner {
  outline: 0;
}

.Popup {
  --input-container-height: 3rem;
  box-sizing: border-box;
  border-radius: 0.5rem;
  background-color: canvas;
  color: var(--color-gray-900);
  transform-origin: var(--transform-origin);
  transition:
    transform 150ms,
    opacity 150ms;
  max-width: var(--available-width);
  max-height: 20.5rem;

  &[data-starting-style],
  &[data-ending-style] {
    opacity: 0;
    transform: scale(0.9);
  }

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
  }
}

.List {
  overflow: auto;
  scroll-padding-top: 2.5rem;
  scroll-padding-bottom: 0.35rem;
  overscroll-behavior: contain;
  max-height: min(
    calc(20.5rem - var(--input-container-height)),
    calc(var(--available-height) - var(--input-container-height))
  );

  &:empty {
    padding: 0;
  }
}

.ListContainer {
  padding: 0.5rem;
}

.GroupLabel {
  box-sizing: border-box;
  padding: 0.5rem 1rem 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  background-color: canvas;
  border-bottom: 1px solid var(--color-gray-100);
  position: sticky;
  z-index: 1;
  top: 0;
  margin: 0;
  width: 100%;
}

.Group {
  display: block;
}

.Grid {
  padding: 0.25rem;
}

.Row {
  display: grid;
  grid-template-columns: repeat(var(--cols, 5), 1fr);
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: var(--anchor-width);
  height: 2.5rem;
  padding: 0.5rem 0.125rem;
  border-radius: 0.375rem;
  background: transparent;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);

    &::before {
      content: '';
      z-index: -1;
      position: absolute;
      inset: 0;
      border-radius: 0.375rem;
      background-color: var(--color-gray-200);
    }
  }
}

.Emoji {
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.Name {
  font-size: 0.625rem;
  text-align: center;
  opacity: 0.8;
  line-height: 1.2;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.Item[data-highlighted] .Name {
  opacity: 1;
}

.Empty:not(:empty) {
  box-sizing: border-box;
  padding: 0.5rem 1rem 1rem;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import styles from './index.module.css';

export default function ExampleEmojiPicker() {
  const [pickerOpen, setPickerOpen] = React.useState(false);
  const [textValue, setTextValue] = React.useState('');
  const [searchValue, setSearchValue] = React.useState('');

  const textInputRef = React.useRef<HTMLInputElement | null>(null);

  function handleInsertEmoji(value: string | null) {
    if (!value || !textInputRef.current) {
      return;
    }

    const emoji = value;
    const start = textInputRef.current.selectionStart ?? textInputRef.current.value.length ?? 0;
    const end = textInputRef.current.selectionEnd ?? textInputRef.current.value.length ?? 0;

    setTextValue((prev) => prev.slice(0, start) + emoji + prev.slice(end));
    setPickerOpen(false);

    const input = textInputRef.current;
    if (input) {
      input.focus();
      const caretPos = start + emoji.length;
      input.setSelectionRange(caretPos, caretPos);
    }
  }

  return (
    <div className={styles.Container}>
      <div className={styles.InputGroup}>
        <input
          ref={textInputRef}
          type="text"
          className={styles.TextInput}
          placeholder="iMessage"
          value={textValue}
          onChange={(event) => setTextValue(event.target.value)}
        />

        <Autocomplete.Root
          items={emojiGroups}
          grid
          open={pickerOpen}
          onOpenChange={setPickerOpen}
          onOpenChangeComplete={() => setSearchValue('')}
          value={searchValue}
          onValueChange={(value, details) => {
            if (details.reason !== 'item-press') {
              setSearchValue(value);
            }
          }}
        >
          <Autocomplete.Trigger className={styles.EmojiButton} aria-label="Choose emoji">
            😀
          </Autocomplete.Trigger>
          <Autocomplete.Portal>
            <Autocomplete.Positioner className={styles.Positioner} sideOffset={4} align="end">
              <Autocomplete.Popup className={styles.Popup} aria-label="Select emoji">
                <div className={styles.InputContainer}>
                  <Autocomplete.Input placeholder="Search emojis…" className={styles.Input} />
                </div>
                <Autocomplete.Empty className={styles.Empty}>No emojis found</Autocomplete.Empty>
                <Autocomplete.List
                  className={styles.List}
                  style={{ '--cols': COLUMNS } as React.CSSProperties}
                >
                  {(group: EmojiGroup) => (
                    <Autocomplete.Group
                      key={group.value}
                      items={group.items}
                      className={styles.Group}
                    >
                      <Autocomplete.GroupLabel className={styles.GroupLabel}>
                        {group.label}
                      </Autocomplete.GroupLabel>
                      <div className={styles.Grid} role="presentation">
                        {chunkArray(group.items, COLUMNS).map((row, rowIdx) => (
                          <Autocomplete.Row key={rowIdx} className={styles.Row}>
                            {row.map((rowItem) => (
                              <Autocomplete.Item
                                key={rowItem.emoji}
                                value={rowItem}
                                className={styles.Item}
                                onClick={() => {
                                  handleInsertEmoji(rowItem.emoji);
                                  setPickerOpen(false);
                                }}
                              >
                                <span className={styles.Emoji}>{rowItem.emoji}</span>
                              </Autocomplete.Item>
                            ))}
                          </Autocomplete.Row>
                        ))}
                      </div>
                    </Autocomplete.Group>
                  )}
                </Autocomplete.List>
              </Autocomplete.Popup>
            </Autocomplete.Positioner>
          </Autocomplete.Portal>
        </Autocomplete.Root>
      </div>
    </div>
  );
}

const COLUMNS = 5;

function chunkArray<T>(array: T[], size: number): T[][] {
  const result: T[][] = [];
  for (let i = 0; i < array.length; i += size) {
    result.push(array.slice(i, i + size));
  }
  return result;
}

interface EmojiItem {
  emoji: string;
  value: string;
  name: string;
}

interface EmojiGroup {
  value: string;
  label: string;
  items: EmojiItem[];
}

export const emojiCategories = [
  {
    label: 'Smileys & Emotion',
    emojis: [
      { emoji: '😀', name: 'grinning face' },
      { emoji: '😃', name: 'grinning face with big eyes' },
      { emoji: '😄', name: 'grinning face with smiling eyes' },
      { emoji: '😁', name: 'beaming face with smiling eyes' },
      { emoji: '😆', name: 'grinning squinting face' },
      { emoji: '😅', name: 'grinning face with sweat' },
      { emoji: '🤣', name: 'rolling on the floor laughing' },
      { emoji: '😂', name: 'face with tears of joy' },
      { emoji: '🙂', name: 'slightly smiling face' },
      { emoji: '🙃', name: 'upside-down face' },
      { emoji: '😉', name: 'winking face' },
      { emoji: '😊', name: 'smiling face with smiling eyes' },
      { emoji: '😇', name: 'smiling face with halo' },
      { emoji: '🥰', name: 'smiling face with hearts' },
      { emoji: '😍', name: 'smiling face with heart-eyes' },
      { emoji: '🤩', name: 'star-struck' },
      { emoji: '😘', name: 'face blowing a kiss' },
      { emoji: '😗', name: 'kissing face' },
      { emoji: '☺️', name: 'smiling face' },
      { emoji: '😚', name: 'kissing face with closed eyes' },
      { emoji: '😙', name: 'kissing face with smiling eyes' },
      { emoji: '🥲', name: 'smiling face with tear' },
      { emoji: '😋', name: 'face savoring food' },
      { emoji: '😛', name: 'face with tongue' },
      { emoji: '😜', name: 'winking face with tongue' },
      { emoji: '🤪', name: 'zany face' },
      { emoji: '😝', name: 'squinting face with tongue' },
      { emoji: '🤑', name: 'money-mouth face' },
      { emoji: '🤗', name: 'hugging face' },
      { emoji: '🤭', name: 'face with hand over mouth' },
    ],
  },
  {
    label: 'Animals & Nature',
    emojis: [
      { emoji: '🐶', name: 'dog face' },
      { emoji: '🐱', name: 'cat face' },
      { emoji: '🐭', name: 'mouse face' },
      { emoji: '🐹', name: 'hamster' },
      { emoji: '🐰', name: 'rabbit face' },
      { emoji: '🦊', name: 'fox' },
      { emoji: '🐻', name: 'bear' },
      { emoji: '🐼', name: 'panda' },
      { emoji: '🐨', name: 'koala' },
      { emoji: '🐯', name: 'tiger face' },
      { emoji: '🦁', name: 'lion' },
      { emoji: '🐮', name: 'cow face' },
      { emoji: '🐷', name: 'pig face' },
      { emoji: '🐽', name: 'pig nose' },
      { emoji: '🐸', name: 'frog' },
      { emoji: '🐵', name: 'monkey face' },
      { emoji: '🙈', name: 'see-no-evil monkey' },
      { emoji: '🙉', name: 'hear-no-evil monkey' },
      { emoji: '🙊', name: 'speak-no-evil monkey' },
      { emoji: '🐒', name: 'monkey' },
      { emoji: '🐔', name: 'chicken' },
      { emoji: '🐧', name: 'penguin' },
      { emoji: '🐦', name: 'bird' },
      { emoji: '🐤', name: 'baby chick' },
      { emoji: '🐣', name: 'hatching chick' },
      { emoji: '🐥', name: 'front-facing baby chick' },
      { emoji: '🦆', name: 'duck' },
      { emoji: '🦅', name: 'eagle' },
      { emoji: '🦉', name: 'owl' },
      { emoji: '🦇', name: 'bat' },
    ],
  },
  {
    label: 'Food & Drink',
    emojis: [
      { emoji: '🍎', name: 'red apple' },
      { emoji: '🍏', name: 'green apple' },
      { emoji: '🍊', name: 'tangerine' },
      { emoji: '🍋', name: 'lemon' },
      { emoji: '🍌', name: 'banana' },
      { emoji: '🍉', name: 'watermelon' },
      { emoji: '🍇', name: 'grapes' },
      { emoji: '🍓', name: 'strawberry' },
      { emoji: '🫐', name: 'blueberries' },
      { emoji: '🍈', name: 'melon' },
      { emoji: '🍒', name: 'cherries' },
      { emoji: '🍑', name: 'peach' },
      { emoji: '🥭', name: 'mango' },
      { emoji: '🍍', name: 'pineapple' },
      { emoji: '🥥', name: 'coconut' },
      { emoji: '🥝', name: 'kiwi fruit' },
      { emoji: '🍅', name: 'tomato' },
      { emoji: '🍆', name: 'eggplant' },
      { emoji: '🥑', name: 'avocado' },
      { emoji: '🥦', name: 'broccoli' },
      { emoji: '🥬', name: 'leafy greens' },
      { emoji: '🥒', name: 'cucumber' },
      { emoji: '🌶️', name: 'hot pepper' },
      { emoji: '🫑', name: 'bell pepper' },
      { emoji: '🌽', name: 'ear of corn' },
      { emoji: '🥕', name: 'carrot' },
      { emoji: '🫒', name: 'olive' },
      { emoji: '🧄', name: 'garlic' },
      { emoji: '🧅', name: 'onion' },
      { emoji: '🥔', name: 'potato' },
    ],
  },
];

const emojiGroups: EmojiGroup[] = emojiCategories.map((category) => ({
  value: category.label,
  label: category.label,
  items: category.emojis.map((emoji) => ({
    ...emoji,
    value: emoji.name.toLowerCase(),
  })),
}));
```

### Virtualized

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

## Demo

### Tailwind

This example shows how to implement the component using Tailwind CSS.

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { useVirtualizer } from '@tanstack/react-virtual';

export default function ExampleVirtualizedAutocomplete() {
  const [open, setOpen] = React.useState(false);
  const virtualizerRef = React.useRef<Virtualizer | null>(null);

  return (
    <Autocomplete.Root
      virtualized
      items={virtualizedItems}
      open={open}
      onOpenChange={setOpen}
      openOnInputClick
      itemToStringValue={getItemLabel}
      onItemHighlighted={(item, { reason, index }) => {
        const virtualizer = virtualizerRef.current;

        if (!item || !virtualizer) {
          return;
        }

        const isStart = index === 0;
        const isEnd = index === virtualizer.options.count - 1;
        const shouldScroll = reason === 'none' || (reason === 'keyboard' && (isStart || isEnd));

        if (shouldScroll) {
          queueMicrotask(() => {
            virtualizer.scrollToIndex(index, { align: isEnd ? 'start' : 'end' });
          });
        }
      }}
    >
      <label className="flex flex-col gap-1 text-sm leading-5 font-medium text-gray-900">
        Search 10,000 items
        <Autocomplete.Input className="bg-[canvas] h-10 w-[16rem] md:w-[20rem] font-normal rounded-md border border-gray-200 pl-3.5 text-base text-gray-900 focus:outline focus:outline-2 focus:-outline-offset-1 focus:outline-blue-800" />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className="outline-none" sideOffset={4}>
          <Autocomplete.Popup className="w-[var(--anchor-width)] max-h-[min(22rem,var(--available-height))] max-w-[var(--available-width)] rounded-md bg-[canvas] text-gray-900 outline-1 outline-gray-200 shadow-lg shadow-gray-200 dark:-outline-offset-1 dark:outline-gray-300">
            <Autocomplete.Empty className="px-4 py-4 text-[0.925rem] leading-4 text-gray-600 empty:m-0 empty:p-0">
              No items found.
            </Autocomplete.Empty>
            <Autocomplete.List className="p-0">
              <VirtualizedList open={open} virtualizerRef={virtualizerRef} />
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

function VirtualizedList({
  open,
  virtualizerRef,
}: {
  open: boolean;
  virtualizerRef: React.RefObject<Virtualizer | null>;
}) {
  const filteredItems = Autocomplete.useFilteredItems<VirtualizedItem>();

  const scrollElementRef = React.useRef<HTMLDivElement | null>(null);

  const virtualizer = useVirtualizer({
    enabled: open,
    count: filteredItems.length,
    getScrollElement: () => scrollElementRef.current,
    estimateSize: () => 32,
    overscan: 20,
    paddingStart: 8,
    paddingEnd: 8,
    scrollPaddingEnd: 8,
    scrollPaddingStart: 8,
  });

  React.useImperativeHandle(virtualizerRef, () => virtualizer);

  const handleScrollElementRef = React.useCallback(
    (element: HTMLDivElement | null) => {
      scrollElementRef.current = element;
      if (element) {
        virtualizer.measure();
      }
    },
    [virtualizer],
  );

  const totalSize = virtualizer.getTotalSize();

  if (!filteredItems.length) {
    return null;
  }

  return (
    <div
      role="presentation"
      ref={handleScrollElementRef}
      className="h-[min(22rem,var(--total-size))] max-h-[var(--available-height)] overflow-auto overscroll-contain scroll-p-2"
      style={{ '--total-size': `${totalSize}px` } as React.CSSProperties}
    >
      <div role="presentation" className="relative w-full" style={{ height: totalSize }}>
        {virtualizer.getVirtualItems().map((virtualItem) => {
          const item = filteredItems[virtualItem.index];
          if (!item) {
            return null;
          }

          return (
            <Autocomplete.Item
              key={virtualItem.key}
              index={virtualItem.index}
              data-index={virtualItem.index}
              ref={virtualizer.measureElement}
              value={item}
              className="flex cursor-default py-2 pr-8 pl-4 text-base leading-4 outline-none select-none data-[highlighted]:relative data-[highlighted]:z-0 data-[highlighted]:text-gray-50 data-[highlighted]:before:absolute data-[highlighted]:before:inset-x-2 data-[highlighted]:before:inset-y-0 data-[highlighted]:before:z-[-1] data-[highlighted]:before:rounded data-[highlighted]:before:bg-gray-900"
              aria-setsize={filteredItems.length}
              aria-posinset={virtualItem.index + 1}
              style={{
                position: 'absolute',
                top: 0,
                left: 0,
                width: '100%',
                height: virtualItem.size,
                transform: `translateY(${virtualItem.start}px)`,
              }}
            >
              {item.name}
            </Autocomplete.Item>
          );
        })}
      </div>
    </div>
  );
}

interface VirtualizedItem {
  id: string;
  name: string;
}

function getItemLabel(item: VirtualizedItem | null) {
  return item ? item.name : '';
}

const virtualizedItems: VirtualizedItem[] = Array.from({ length: 10000 }, (_, index) => {
  const id = String(index + 1);
  const indexLabel = id.padStart(4, '0');
  return { id, name: `Item ${indexLabel}` };
});

type Virtualizer = ReturnType<typeof useVirtualizer<HTMLDivElement, Element>>;
```

### CSS Modules

This example shows how to implement the component using CSS Modules.

```css
/* index.module.css */
.Input {
  box-sizing: border-box;
  padding-left: 0.875rem;
  margin: 0;
  border: 1px solid var(--color-gray-200);
  width: 16rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: canvas;
  color: var(--color-gray-900);
  outline: none;

  &:focus {
    border-color: var(--color-blue);
    outline: 1px solid var(--color-blue);
  }

  @media (min-width: 500px) {
    width: 20rem;
  }
}

.Label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.Positioner {
  outline: 0;
}

.Popup {
  box-sizing: border-box;
  border-radius: 0.375rem;
  background-color: canvas;
  color: var(--color-gray-900);
  width: var(--anchor-width);
  max-height: min(22rem, var(--available-height));
  max-width: var(--available-width);

  @media (prefers-color-scheme: light) {
    outline: 1px solid var(--color-gray-200);
    box-shadow:
      0 10px 15px -3px var(--color-gray-200),
      0 4px 6px -4px var(--color-gray-200);
  }

  @media (prefers-color-scheme: dark) {
    outline: 1px solid var(--color-gray-300);
    outline-offset: -1px;
  }
}

.Scroller {
  box-sizing: border-box;
  height: min(22rem, var(--total-size));
  max-height: var(--available-height);
  overflow: auto;
  overscroll-behavior: contain;
  scroll-padding-block: 0.5rem;
}

.VirtualizedPlaceholder {
  width: 100%;
  position: relative;
}

.List {
  padding: 0;
}

.Item {
  box-sizing: border-box;
  outline: 0;
  cursor: default;
  user-select: none;
  padding-block: 0.5rem;
  padding-left: 1rem;
  padding-right: 2rem;
  display: flex;
  font-size: 1rem;
  line-height: 1rem;

  &[data-highlighted] {
    z-index: 0;
    position: relative;
    color: var(--color-gray-50);
  }

  &[data-highlighted]::before {
    content: '';
    z-index: -1;
    position: absolute;
    inset-block: 0;
    inset-inline: 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--color-gray-900);
  }
}

.Empty:not(:empty) {
  box-sizing: border-box;
  font-size: 0.925rem;
  line-height: 1rem;
  color: var(--color-gray-600);
  padding: 1rem;
}
```

```tsx
/* index.tsx */
'use client';
import * as React from 'react';
import { Autocomplete } from '@base-ui/react/autocomplete';
import { useVirtualizer } from '@tanstack/react-virtual';
import styles from './index.module.css';

export default function ExampleVirtualizedAutocomplete() {
  const [open, setOpen] = React.useState(false);
  const virtualizerRef = React.useRef<Virtualizer | null>(null);

  return (
    <Autocomplete.Root
      virtualized
      items={virtualizedItems}
      open={open}
      onOpenChange={setOpen}
      openOnInputClick
      itemToStringValue={getItemLabel}
      onItemHighlighted={(item, { reason, index }) => {
        const virtualizer = virtualizerRef.current;

        if (!item || !virtualizer) {
          return;
        }

        const isStart = index === 0;
        const isEnd = index === virtualizer.options.count - 1;
        const shouldScroll = reason === 'none' || (reason === 'keyboard' && (isStart || isEnd));

        if (shouldScroll) {
          queueMicrotask(() => {
            virtualizer.scrollToIndex(index, { align: isEnd ? 'start' : 'end' });
          });
        }
      }}
    >
      <label className={styles.Label}>
        Search 10,000 items
        <Autocomplete.Input className={styles.Input} />
      </label>

      <Autocomplete.Portal>
        <Autocomplete.Positioner className={styles.Positioner} sideOffset={4}>
          <Autocomplete.Popup className={styles.Popup}>
            <Autocomplete.Empty className={styles.Empty}>No items found.</Autocomplete.Empty>
            <Autocomplete.List className={styles.List}>
              <VirtualizedList open={open} virtualizerRef={virtualizerRef} />
            </Autocomplete.List>
          </Autocomplete.Popup>
        </Autocomplete.Positioner>
      </Autocomplete.Portal>
    </Autocomplete.Root>
  );
}

function VirtualizedList({
  open,
  virtualizerRef,
}: {
  open: boolean;
  virtualizerRef: React.RefObject<Virtualizer | null>;
}) {
  const filteredItems = Autocomplete.useFilteredItems<VirtualizedItem>();

  const scrollElementRef = React.useRef<HTMLDivElement | null>(null);

  const virtualizer = useVirtualizer({
    enabled: open,
    count: filteredItems.length,
    getScrollElement: () => scrollElementRef.current,
    estimateSize: () => 32,
    overscan: 20,
    paddingStart: 8,
    paddingEnd: 8,
    scrollPaddingEnd: 8,
    scrollPaddingStart: 8,
  });

  React.useImperativeHandle(virtualizerRef, () => virtualizer);

  const handleScrollElementRef = React.useCallback(
    (element: HTMLDivElement | null) => {
      scrollElementRef.current = element;
      if (element) {
        virtualizer.measure();
      }
    },
    [virtualizer],
  );

  const totalSize = virtualizer.getTotalSize();

  if (!filteredItems.length) {
    return null;
  }

  return (
    <div
      role="presentation"
      ref={handleScrollElementRef}
      className={styles.Scroller}
      style={{ '--total-size': `${totalSize}px` } as React.CSSProperties}
    >
      <div
        role="presentation"
        className={styles.VirtualizedPlaceholder}
        style={{ height: totalSize }}
      >
        {virtualizer.getVirtualItems().map((virtualItem) => {
          const item = filteredItems[virtualItem.index];
          if (!item) {
            return null;
          }

          return (
            <Autocomplete.Item
              key={virtualItem.key}
              index={virtualItem.index}
              data-index={virtualItem.index}
              ref={virtualizer.measureElement}
              value={item}
              className={styles.Item}
              aria-setsize={filteredItems.length}
              aria-posinset={virtualItem.index + 1}
              style={{
                position: 'absolute',
                top: 0,
                left: 0,
                width: '100%',
                height: virtualItem.size,
                transform: `translateY(${virtualItem.start}px)`,
              }}
            >
              {item.name}
            </Autocomplete.Item>
          );
        })}
      </div>
    </div>
  );
}

interface VirtualizedItem {
  id: string;
  name: string;
}

function getItemLabel(item: VirtualizedItem | null) {
  return item ? item.name : '';
}

const virtualizedItems: VirtualizedItem[] = Array.from({ length: 10000 }, (_, index) => {
  const id = String(index + 1);
  const indexLabel = id.padStart(4, '0');
  return { id, name: `Item ${indexLabel}` };
});

type Virtualizer = ReturnType<typeof useVirtualizer<HTMLDivElement, Element>>;
```

## API reference

### Root

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

**Root Props:**

| Prop                                                                   | Type                                                                                                                        | Default  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| :--------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------------------------------- | :------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| name                                                                   | `string`                                                                                                                    | -        | Identifies the field when a form is submitted.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| defaultValue                                                           | `string \| number \| string[]`                                                                                              | -        | The uncontrolled input value of the autocomplete when it's initially rendered.To render a controlled autocomplete, use the `value` prop instead.                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| value                                                                  | `string \| number \| string[]`                                                                                              | -        | The input value of the autocomplete. Use when controlled.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| onValueChange                                                          | `((value: string, eventDetails: Autocomplete.Root.ChangeEventDetails) => void)`                                             | -        | Event handler called when the input value of the autocomplete changes.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| defaultOpen                                                            | `boolean`                                                                                                                   | `false`  | Whether the popup is initially open.To render a controlled popup, use the `open` prop instead.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| open                                                                   | `boolean`                                                                                                                   | -        | Whether the popup is currently open. Use when controlled.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| onOpenChange                                                           | `((open: boolean, eventDetails: Autocomplete.Root.ChangeEventDetails) => void)`                                             | -        | Event handler called when the popup is opened or closed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| autoHighlight                                                          | `boolean \| 'always'`                                                                                                       | `false`  | Whether the first matching item is highlighted automatically.\* `true`: highlight after the user types and keep the highlight while the query changes.                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| \* `'always'`: always highlight the first item.                        |
| keepHighlight                                                          | `boolean`                                                                                                                   | `false`  | Whether the highlighted item should be preserved when the pointer leaves the list.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| highlightItemOnHover                                                   | `boolean`                                                                                                                   | `true`   | Whether moving the pointer over items should highlight them.&#xA;Disabling this prop allows CSS `:hover` to be differentiated from the `:focus` (`data-highlighted`) state.                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| actionsRef                                                             | `RefObject<Autocomplete.Root.Actions \| null>`                                                                              | -        | A ref to imperative actions.\* `unmount`: When specified, the autocomplete will not be unmounted when closed.&#xA;Instead, the `unmount` function must be called to unmount the autocomplete manually.&#xA;Useful when the autocomplete's animation is controlled by an external library.                                                                                                                                                                                                                                                                                                                         |
| filter                                                                 | `((itemValue: ItemValue, query: string, itemToString: ((itemValue: ItemValue) => string) \| undefined) => boolean) \| null` | -        | Filter function used to match items vs input query.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| filteredItems                                                          | `any[] \| Group[]`                                                                                                          | -        | Filtered items to display in the list.&#xA;When provided, the list will use these items instead of filtering the `items` prop internally.&#xA;Use when you want to control filtering logic externally with the `useFilter()` hook.                                                                                                                                                                                                                                                                                                                                                                                |
| grid                                                                   | `boolean`                                                                                                                   | `false`  | Whether list items are presented in a grid layout.&#xA;When enabled, arrow keys navigate across rows and columns inferred from DOM rows.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| inline                                                                 | `boolean`                                                                                                                   | `false`  | Whether the list is rendered inline without using the popup.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| itemToStringValue                                                      | `((itemValue: ItemValue) => string)`                                                                                        | -        | When the item values are objects (`<Autocomplete.Item value={object}>`), this function converts the object value to a string representation for both display in the input and form submission.&#xA;If the shape of the object is `{ value, label }`, the label will be used automatically without needing to specify this prop.                                                                                                                                                                                                                                                                                   |
| items                                                                  | `({ items: any[] })[] \| ItemValue[]`                                                                                       | -        | The items to be displayed in the list.&#xA;Can be either a flat array of items or an array of groups with items.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| limit                                                                  | `number`                                                                                                                    | `-1`     | The maximum number of items to display in the list.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| locale                                                                 | `Intl.LocalesArgument`                                                                                                      | -        | The locale to use for string comparison.&#xA;Defaults to the user's runtime locale.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| loopFocus                                                              | `boolean`                                                                                                                   | `true`   | Whether to loop keyboard focus back to the input when the end of the list is reached while using the arrow keys. The first item can then be reached by pressing <kbd>ArrowDown</kbd> again from the input, or the last item can be reached by pressing <kbd>ArrowUp</kbd> from the input.&#xA;The input is always included in the focus loop per [ARIA Authoring Practices](https://www.w3.org/WAI/ARIA/apg/patterns/combobox/).&#xA;When disabled, focus does not move when on the last element and the user presses <kbd>ArrowDown</kbd>, or when on the first element and the user presses <kbd>ArrowUp</kbd>. |
| modal                                                                  | `boolean`                                                                                                                   | `false`  | 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. |
| mode                                                                   | `'list' \| 'both' \| 'inline' \| 'none'`                                                                                    | `'list'` | Controls how the autocomplete behaves with respect to list filtering and inline autocompletion.\* `list` (default): items are dynamically filtered based on the input value. The input value does not change based on the active item.                                                                                                                                                                                                                                                                                                                                                                            |

- `both`: items are dynamically filtered based on the input value, which will temporarily change based on the active item (inline autocompletion).
- `inline`: items are static (not filtered), and the input value will temporarily change based on the active item (inline autocompletion).
- `none`: items are static (not filtered), and the input value will not change based on the active item. |
  | onItemHighlighted | `((highlightedValue: ItemValue \| undefined, eventDetails: Autocomplete.Root.HighlightEventDetails) => void)` | - | Callback fired when an item is highlighted or unhighlighted.&#xA;Receives the highlighted item value (or `undefined` if no item is highlighted) and event details with a `reason` property describing why the highlight changed.&#xA;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. |
  | onOpenChangeComplete | `((open: boolean) => void)` | - | Event handler called after any animations complete when the popup is opened or closed. |
  | openOnInputClick | `boolean` | `false` | Whether the popup opens when clicking the input. |
  | submitOnItemClick | `boolean` | `false` | Whether clicking an item should submit the autocomplete's owning form.&#xA;By default, clicking an item via a pointer or <kbd>Enter</kbd> key does not submit the owning form.&#xA;Useful when the autocomplete is used as a single-field form search input. |
  | virtualized | `boolean` | `false` | Whether the items are being externally virtualized. |
  | disabled | `boolean` | `false` | Whether the component should ignore user interaction. |
  | readOnly | `boolean` | `false` | Whether the user should be unable to choose a different option from the popup. |
  | required | `boolean` | `false` | Whether the user must choose a value before submitting a form. |
  | inputRef | `Ref<HTMLInputElement>` | - | A ref to the hidden input element. |
  | id | `string` | - | The id of the component. |
  | children | `ReactNode` | - | - |

### Value

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

**Value Props:**

| Prop     | Type                                          | Default | Description |
| :------- | :-------------------------------------------- | :------ | :---------- |
| children | `ReactNode \| ((value: string) => ReactNode)` | -       | -           |

### Input

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

**Input Props:**

| Prop      | Type                                                                                | Default | Description                                                                                                                                                                                  |
| :-------- | :---------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| disabled  | `boolean`                                                                           | `false` | Whether the component should ignore user interaction.                                                                                                                                        |
| className | `string \| ((state: Combobox.Input.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Input.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Input.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Input Data Attributes:**

| Attribute       | Type                                                                               | Description                                                                        |
| :-------------- | :--------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------- |
| data-popup-open | -                                                                                  | Present when the corresponding popup is open.                                      |
| data-popup-side | `'top' \| 'bottom' \| 'left' \| 'right' \| 'inline-end' \| 'inline-start' \| null` | 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).                    |

### Trigger

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

**Trigger Props:**

| Prop         | Type                                                                                  | Default | Description                                                                                                                                                                                  |
| :----------- | :------------------------------------------------------------------------------------ | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| nativeButton | `boolean`                                                                             | `true`  | Whether the component renders a native `<button>` element when replacing it&#xA;via the `render` prop.&#xA;Set to `false` if the rendered element is not a button (e.g. `<div>`).            |
| disabled     | `boolean`                                                                             | `false` | Whether the component should ignore user interaction.                                                                                                                                        |
| className    | `string \| ((state: Combobox.Trigger.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style        | `CSSProperties \| ((state: Combobox.Trigger.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render       | `ReactElement \| ((props: HTMLProps, state: Combobox.Trigger.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Trigger Data Attributes:**

| Attribute        | Type                                                                               | Description                                                                        |
| :--------------- | :--------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------- |
| data-popup-open  | -                                                                                  | Present when the corresponding popup is open.                                      |
| data-popup-side  | `'top' \| 'bottom' \| 'left' \| 'right' \| 'inline-end' \| 'inline-start' \| null` | 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 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).                  |
| data-placeholder | -                                                                                  | Present when the combobox doesn't have a value.                                    |

### Icon

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

**Icon Props:**

| Prop      | Type                                                                               | Default | Description                                                                                                                                                                                  |
| :-------- | :--------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Icon.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Icon.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Icon.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### Clear

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

**Clear Props:**

| Prop         | Type                                                                                | Default | Description                                                                                                                                                                                  |
| :----------- | :---------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| nativeButton | `boolean`                                                                           | `true`  | Whether the component renders a native `<button>` element when replacing it&#xA;via the `render` prop.&#xA;Set to `false` if the rendered element is not a button (e.g. `<div>`).            |
| disabled     | `boolean`                                                                           | `false` | Whether the component should ignore user interaction.                                                                                                                                        |
| className    | `string \| ((state: Combobox.Clear.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style        | `CSSProperties \| ((state: Combobox.Clear.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| keepMounted  | `boolean`                                                                           | `false` | Whether the component should remain mounted in the DOM when not visible.                                                                                                                     |
| render       | `ReactElement \| ((props: HTMLProps, state: Combobox.Clear.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Clear Data Attributes:**

| Attribute           | Type | 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.     |

### List

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

**List Props:**

| Prop      | Type                                                                               | Default | Description                                                                                                                                                                                  |
| :-------- | :--------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| children  | `ReactNode \| ((item: any, index: number) => ReactNode)`                           | -       | -                                                                                                                                                                                            |
| className | `string \| ((state: Combobox.List.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.List.State) => CSSProperties \| undefined)`    | -       | \*                                                                                                                                                                                           |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.List.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### 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.

**Portal Props:**

| Prop        | Type                                                                                 | Default | Description                                                                                                                                                                                  |
| :---------- | :----------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| container   | `HTMLElement \| ShadowRoot \| RefObject<HTMLElement \| ShadowRoot \| null> \| null`  | -       | A parent element to render the portal element into.                                                                                                                                          |
| className   | `string \| ((state: Combobox.Portal.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style       | `CSSProperties \| ((state: Combobox.Portal.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| keepMounted | `boolean`                                                                            | `false` | Whether to keep the portal mounted in the DOM while the popup is hidden.                                                                                                                     |
| render      | `ReactElement \| ((props: HTMLProps, state: Combobox.Portal.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### Backdrop

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

**Backdrop Props:**

| Prop      | Type                                                                                   | Default | Description                                                                                                                                                                                  |
| :-------- | :------------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Backdrop.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Backdrop.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Backdrop.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Backdrop Data Attributes:**

| Attribute           | Type | 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.

**Positioner Props:**

| Prop                  | Type                       | Default    | Description                                                                                                                                                                                                                                                                                                                                                                           |
| :-------------------- | :------------------------- | :--------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| disableAnchorTracking | `boolean`                  | `false`    | Whether to disable the popup from tracking any layout shift of its positioning anchor.                                                                                                                                                                                                                                                                                                |
| align                 | `Align`                    | `'center'` | How to align the popup relative to the specified side.                                                                                                                                                                                                                                                                                                                                |
| alignOffset           | `number \| OffsetFunction` | `0`        | Additional offset along the alignment axis in pixels.&#xA;Also accepts a function that returns the offset to read the dimensions of the anchor&#xA;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. |
  | side | `Side` | `'bottom'` | Which side of the anchor element to align the popup against.&#xA;May automatically change to avoid collisions. |
  | sideOffset | `number \| OffsetFunction` | `0` | Distance between the anchor and the popup in pixels.&#xA;Also accepts a function that returns the distance to read the dimensions of the anchor&#xA;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. |
  | arrowPadding | `number` | `5` | 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. |
  | anchor | `Element \| VirtualElement \| RefObject<Element \| null> \| (() => Element \| VirtualElement \| null) \| null` | - | An element to position the popup against.&#xA;By default, the popup will be positioned against the trigger. |
  | collisionAvoidance | `CollisionAvoidance` | - | Determines how to handle collisions when positioning the popup. |
  | collisionBoundary | `Boundary` | `'clipping-ancestors'` | An element or a rectangle that delimits the area that the popup is confined to. |
  | collisionPadding | `Padding` | `5` | Additional space to maintain from the edge of the collision boundary. |
  | sticky | `boolean` | `false` | Whether to maintain the popup in the viewport after&#xA;the anchor element was scrolled out of view. |
  | positionMethod | `'absolute' \| 'fixed'` | `'absolute'` | Determines which CSS `position` property to use. |
  | className | `string \| ((state: Combobox.Positioner.State) => string \| undefined)` | - | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state. |
  | style | `CSSProperties \| ((state: Combobox.Positioner.State) => CSSProperties \| undefined)` | - | - |
  | render | `ReactElement \| ((props: HTMLProps, state: Combobox.Positioner.State) => ReactElement)` | - | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Positioner Data Attributes:**

| Attribute          | Type                                                                       | 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         | `'start' \| 'center' \| 'end'`                                             | Indicates how the popup is aligned relative to specified side.        |
| data-empty         | -                                                                          | Present when the items list is empty.                                 |
| data-side          | `'top' \| 'bottom' \| 'left' \| 'right' \| 'inline-end' \| 'inline-start'` | Indicates which side the popup is positioned relative to the trigger. |

**Positioner CSS Variables:**

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

### Popup

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

**Popup Props:**

| Prop         | Type                                                                                                                   | Default | Description                                                                             |
| :----------- | :--------------------------------------------------------------------------------------------------------------------- | :------ | :-------------------------------------------------------------------------------------- |
| initialFocus | `boolean \| RefObject<HTMLElement \| null> \| ((openType: InteractionType) => boolean \| void \| HTMLElement \| null)` | -       | 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`).&#xA;Return an element to focus, `true` to use the default behavior, or `false`/`undefined` to do nothing. |
  | finalFocus | `boolean \| RefObject<HTMLElement \| null> \| ((closeType: InteractionType) => boolean \| void \| HTMLElement \| null)` | - | 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`).&#xA;Return an element to focus, `true` to use the default behavior, or `false`/`undefined` to do nothing. |
  | className | `string \| ((state: Combobox.Popup.State) => string \| undefined)` | - | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state. |
  | style | `CSSProperties \| ((state: Combobox.Popup.State) => CSSProperties \| undefined)` | - | - |
  | render | `ReactElement \| ((props: HTMLProps, state: Combobox.Popup.State) => ReactElement)` | - | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Popup Data Attributes:**

| Attribute           | Type                                                                       | Description                                                           |
| :------------------ | :------------------------------------------------------------------------- | :-------------------------------------------------------------------- |
| data-open           | -                                                                          | Present when the popup is open.                                       |
| data-closed         | -                                                                          | Present when the popup is closed.                                     |
| data-align          | `'start' \| 'center' \| 'end'`                                             | Indicates how the popup is aligned relative to specified side.        |
| data-empty          | -                                                                          | Present when the items list is empty.                                 |
| data-instant        | `'click' \| 'dismiss'`                                                     | Present if animations should be instant.                              |
| data-side           | `'top' \| 'bottom' \| 'left' \| 'right' \| 'inline-end' \| 'inline-start'` | 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.

**Arrow Props:**

| Prop      | Type                                                                                | Default | Description                                                                                                                                                                                  |
| :-------- | :---------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Arrow.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Arrow.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Arrow.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

**Arrow Data Attributes:**

| Attribute       | Type                                                                       | 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      | `'start' \| 'center' \| 'end'`                                             | Indicates how the popup is aligned relative to specified side.        |
| data-side       | `'top' \| 'bottom' \| 'left' \| 'right' \| 'inline-end' \| 'inline-start'` | 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.

**Status Props:**

| Prop      | Type                                                                                 | Default | Description                                                                                                                                                                                  |
| :-------- | :----------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Status.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Status.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Status.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### 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.

**Empty Props:**

| Prop      | Type                                                                                | Default | Description                                                                                                                                                                                  |
| :-------- | :---------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Empty.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Empty.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Empty.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### 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.

**Collection Props:**

| Prop     | Type                                        | Default | Description |
| :------- | :------------------------------------------ | :------ | :---------- |
| children | `((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.

**Row Props:**

| Prop      | Type                                                                              | Default | Description                                                                                                                                                                                  |
| :-------- | :-------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.Row.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Row.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Row.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### Item

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

**Item Props:**

| Prop         | Type                                                                               | Default | Description                                                                                                                                                                                                                             |
| :----------- | :--------------------------------------------------------------------------------- | :------ | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| value        | `any`                                                                              | `null`  | A unique value that identifies this item.                                                                                                                                                                                               |
| onClick      | `((event: BaseUIEvent<MouseEvent<HTMLDivElement, MouseEvent>>) => void)`           | -       | An optional click handler for the item when selected.&#xA;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. |
| index        | `number`                                                                           | -       | The index of the item in the list. Improves performance when specified by avoiding the need to calculate the index automatically from the DOM.                                                                                          |
| nativeButton | `boolean`                                                                          | `false` | Whether the component renders a native `<button>` element when replacing it&#xA;via the `render` prop.&#xA;Set to `true` if the rendered element is a native button.                                                                    |
| disabled     | `boolean`                                                                          | `false` | Whether the component should ignore user interaction.                                                                                                                                                                                   |
| children     | `ReactNode`                                                                        | -       | -                                                                                                                                                                                                                                       |
| className    | `string \| ((state: Combobox.Item.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                                                                |
| style        | `CSSProperties \| ((state: Combobox.Item.State) => CSSProperties \| undefined)`    | -       | \*                                                                                                                                                                                                                                      |
| render       | `ReactElement \| ((props: HTMLProps, state: Combobox.Item.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render.                                            |

**Item Data Attributes:**

| Attribute        | Type | 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.    |

### Group

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

**Group Props:**

| Prop      | Type                                                                                | Default | Description                                                                                                                                                                                  |
| :-------- | :---------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| items     | `any[]`                                                                             | -       | Items to be rendered within this group.&#xA;When provided, child `Collection` components will use these items.                                                                               |
| className | `string \| ((state: Combobox.Group.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.Group.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.Group.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### GroupLabel

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

**GroupLabel Props:**

| Prop      | Type                                                                                     | Default | Description                                                                                                                                                                                  |
| :-------- | :--------------------------------------------------------------------------------------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| className | `string \| ((state: Combobox.GroupLabel.State) => string \| undefined)`                  | -       | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style     | `CSSProperties \| ((state: Combobox.GroupLabel.State) => CSSProperties \| undefined)`    | -       | -                                                                                                                                                                                            |
| render    | `ReactElement \| ((props: HTMLProps, state: Combobox.GroupLabel.State) => ReactElement)` | -       | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

### Separator

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

**Separator Props:**

| Prop        | Type                                                                           | Default        | Description                                                                                                                                                                                  |
| :---------- | :----------------------------------------------------------------------------- | :------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| orientation | `Orientation`                                                                  | `'horizontal'` | The orientation of the separator.                                                                                                                                                            |
| className   | `string \| ((state: Separator.State) => string \| undefined)`                  | -              | CSS class applied to the element, or a function that&#xA;returns a class based on the component’s state.                                                                                     |
| style       | `CSSProperties \| ((state: Separator.State) => CSSProperties \| undefined)`    | -              | -                                                                                                                                                                                            |
| render      | `ReactElement \| ((props: HTMLProps, state: Separator.State) => ReactElement)` | -              | Allows you to replace the component’s HTML element&#xA;with a different tag, or compose it with another component.Accepts a `ReactElement` or a function that returns the element to render. |

## useFilter

Matches items against a query using `Intl.Collator` for robust string matching.
This hook is used when externally filtering items.

### Input parameters

Accepts all `Intl.CollatorOptions`, plus the following option:

**Props:**

| Prop   | Type                   | Default | Description                              |
| :----- | :--------------------- | :------ | :--------------------------------------- |
| locale | `Intl.LocalesArgument` | -       | The locale to use for string comparison. |

### Return value

**Return Value:**

| Property   | Type                                         | Description                                          |
| :--------- | :------------------------------------------- | :--------------------------------------------------- |
| contains   | `(itemValue: any, query: string) => boolean` | Returns whether the item matches the query anywhere. |
| startsWith | `(itemValue: any, query: string) => boolean` | Returns whether the item starts with the query.      |
| endsWith   | `(itemValue: any, query: string) => boolean` | Returns whether the item ends with the query.        |

## useFilteredItems

Returns the internally filtered items when called inside `<Autocomplete.Root>`.

### Return value

**Return Value:**

| Property      | Type    | Description         |
| :------------ | :------ | :------------------ |
| filteredItems | `any[]` | The filtered items. |