Autocomplete

The autocomplete is a text input enhanced by a panel of suggested options when users start typing.

Introduction

Autocomplete is an enhanced version of text input that shows suggested options as the users type and also let them select an option from the list.

Usage

After installation, you can start building with this component using the following basic elements:

import Autocomplete from '@mui/joy/Autocomplete';
import Input from '@mui/joy/Input';

export default function App() {
  return <Autocomplete options={['Option 1', 'Option 2']} />;
}

Basics

The Autocomplete component requires a list of options to be displayed after the textbox is focused. The value must be chosen from a predefined set of allowed values.

Customization

Options structure

By default, the options accepts an array of string or { label: string }:

const options = [
  { label: 'The Godfather', id: 1 },
  { label: 'Pulp Fiction', id: 2 },
];
// or
const options = ['The Godfather', 'Pulp Fiction'];

However, you can use different structures by providing a getOptionLabel prop:

const options = [
  { title: 'Pulp Fiction', id: 2 },
  // ...
];

<Autocomplete getOptionLabel={option => option.title}>

Option appearance

To customize the appearance of the options, use renderOption prop in combination with the AutocompleteOption component as an option container.

Variants

The autocomplete component supports the four global variants: outlined (default), soft, solid, and plain.

Label

Put an Autocomplete, a FormLabel and a FormHelperText (optional) under a FormControl component to create an accessible autocomplete.

Decorators

Use startDecorator or endDecorator to insert decorators to the autocomplete.

Controlled states

The component has two states that can be controlled:

1. the "value" state with the value/onChange props combination. This state represents the value selected by the user, for instance when pressing Enter.
2. the "input value" state with the inputValue/onInputChange props combination. This state represents the value displayed in the textbox.

Disabled options

Use getOptionDisabled prop to read the options and returns true to disable them.

Grouped options

You can group the options with the groupBy prop. If you do so, make sure that the options are also sorted with the same dimension that they are grouped by, otherwise, you will notice duplicate headers.

Loading

It displays a progress state as long as the network request is pending.

Search input

Use freeSolo to create a search input with suggestions experience, e.g. Google search or react-autowhatever.

User's created option

If you intend to use freeSolo mode for a combo box like experience (an enhanced version of a select element) we recommend setting:

• selectOnFocus to help the user clear the selected value.
• clearOnBlur to help the user enter a new value.
• handleHomeEndKeys to move focus inside the popup with the Home and End keys.
• A last option, for instance: Add "YOUR SEARCH".

You could also display a dialog when the user wants to add a new value.

Validation

To display invalid state, set the error prop on the FormControl.

Multiple selection

By default, the autocomplete uses Chip component to render the user's selected options.

When the autocomplete is focused, the user can press the backspace to remove the latest selected option from the list.

Selected options appearance

Use the renderTag prop to customize the appearance.

Limit the selected options to be displayed

You can use the limitTags prop to limit the number of displayed options when not focused.

Sizes

The autocomplete component comes with three sizes out of the box: sm, md (the default), and lg. The size is propagated to internal components, including Input, Chip, and List.

The size can also be controlled at the FormControl.

Custom filter

The component exposes a factory to create a filter method that can be provided to the filterOptions prop. You can use it to change the default option filter behavior.

import { createFilterOptions } from '@mui/material/Autocomplete';

Arguments

1. config (object [optional]):

• config.ignoreAccents (bool [optional]): Defaults to true. Remove diacritics.
• config.ignoreCase (bool [optional]): Defaults to true. Lowercase everything.
• config.limit (number [optional]): Default to null. Limit the number of suggested options to be shown. For example, if config.limit is 100, only the first 100 matching options are shown. It can be useful if a lot of options match and virtualization wasn't set up.
• config.matchFrom ('any' | 'start' [optional]): Defaults to 'any'.
• config.stringify (func [optional]): Controls how an option is converted into a string so that it can be matched against the input text fragment.
• config.trim (bool [optional]): Defaults to false. Remove trailing spaces.

Returns

filterOptions: the returned filter method can be provided directly to the filterOptions prop of the Autocomplete component, or the parameter of the same name for the hook.

In the following demo, the options need to start with the query prefix:

const filterOptions = createFilterOptions({
  matchFrom: 'start',
  stringify: (option) => option.title,
});

<Autocomplete filterOptions={filterOptions} />;

Advanced filter

For richer filtering mechanisms, like fuzzy matching, it's recommended to look at match-sorter. For instance:

import { matchSorter } from 'match-sorter';

const filterOptions = (options, { inputValue }) => matchSorter(options, inputValue);

<Autocomplete filterOptions={filterOptions} />;

Common examples

Highlighting options

The following demo relies on autosuggest-highlight, a small (1 kB) utility for highlighting text in autosuggest and autocomplete components.

GitHub's picker

To reproduce GitHub's label picker, the Autocomplete is rendered inside a PopperUnstyled. To remove the popup behavior from the autocomplete, replace the listbox slot with the AutocompleteListbox component.

Virtualization

Search within 10,000 randomly generated options. The list is virtualized thanks to react-window.

Events

If you would like to prevent the default key handler behavior, you can set the event's defaultMuiPrevented property to true:

<Autocomplete
  onKeyDown={(event) => {
    if (event.key === 'Enter') {
      // Prevent's default 'Enter' behavior.
      event.defaultMuiPrevented = true;
      // your handler code
    }
  }}
/>

CSS Variables

The Autocomplete component reuses CSS variables from the Input component to give you the consistent customization experience.

Limitations

autocomplete/autofill

By default, the component disables the input autocomplete feature (remembering what the user has typed for a given field in a previous session) with the autoComplete="off" attribute. Google Chrome does not currently support this attribute setting (Issue 587466). A possible workaround is to remove the id to have the component generate a random one.

In addition to remembering past entered values, the browser might also propose autofill suggestions (saved login, address, or payment details). In the event you want the avoid autofill, you can try the following:

• Name the input without leaking any information the browser can use. e.g. id="field1" instead of id="country". If you leave the id empty, the component uses a random id.

• Set autoComplete="new-password" (some browsers will suggest a strong password for inputs with this attribute setting):

  <Autocomplete
    slotProps={{
      input: {
        autoComplete: 'new-password',
      },
    }}
  />
  

  Copy (or $keyC)

Read the guide on MDN for more details.

iOS VoiceOver

VoiceOver on iOS Safari doesn't support the aria-owns attribute very well. You can work around the issue with the disablePortal prop.

<Autocomplete
  slotProps={{
    listbox: {
      disablePortal: true,
    },
  }}
/>

Accessibility

(WAI-ARIA: https://www.w3.org/WAI/ARIA/apg/patterns/combobox/)

We encourage the usage of a label for the textbox. The component implements the WAI-ARIA authoring practices.

API

See the documentation below for a complete reference to all of the props and classes available to the components mentioned here.

• <Autocomplete />
• <AutocompleteListbox />
• <AutocompleteOption />