API.md

API Reference

The components and higher-order components (HOCs) described below are publicly exposed in the top-level module. Other components should be considered private and subject to change without notice.

Components

• <Typeahead>
• <AsyncTypeahead>
• <Highlighter>
• <Hint>
• <Input>
• <Menu>
• <MenuItem>
• <TypeaheadInputSingle> & <TypeaheadInputMulti>
• <TypeaheadMenu>
• <Token>

Higher-Order Components & Hooks

• useAsync & withAsync
• useItem & withItem
• useToken & withToken
• useHint

Components

<Typeahead>

The primary component provided by the module.

Props

Name	Type	Default	Description
align	'justify' | 'left' | 'right'	'justify'	Specify menu alignment. The default value is justify, which makes the menu as wide as the input and truncates long values. Specifying left or right will align the menu to that side and the width will be determined by the length of menu item values.
allowNew	boolean | function	false	Specifies whether or not arbitrary, user-defined options may be added to the result set. New entries will be included when the trimmed input is truthy and there is no exact match in the result set. If a function is specified, allows for a callback to decide whether the new entry menu item should be included in the results list. The callback should return a boolean value: (results: Array<Object|string>, props: Object) => boolean
autoFocus	boolean	false	Autofocus the input when the component initially mounts.
caseSensitive	boolean	false	Whether or not filtering should be case-sensitive.
clearButton	boolean	false	Displays a button to clear the input when there are selections.
defaultInputValue	string	''	The initial value displayed in the text input.
defaultOpen	boolean	false	Whether or not the menu is displayed upon initial render.
defaultSelected	Array<Object|string>	[]	Specify any pre-selected options. Use only if you want the component to be uncontrolled.
disabled	boolean		Whether to disable the input. Will also disable selections when multiple={true}.
dropup	boolean	false	Specify whether the menu should appear above the input.
emptyLabel	node	'No matches found.'	Message displayed in the menu when there are no valid results.
filterBy	Array<string> | function		See full documentation in the Filtering section.
flip	boolean	false	Whether or not to automatically adjust the position of the menu when it reaches the viewport boundaries.
highlightOnlyResult	boolean	false	Highlights the menu item if there is only one result and allows selecting that item by hitting enter. Does not work with allowNew.
id required	string or number		An html id attribute, required for assistive technologies such as screen readers.
ignoreDiacritics	boolean	true	Whether the filter should ignore accents and other diacritical marks.
inputProps	object	{}	Props to be applied directly to the input. onBlur, onChange, onFocus, and onKeyDown are ignored.
isInvalid	boolean	false	Adds the is-invalid classname to the form-control. Only affects Bootstrap 4.
isLoading	boolean	false	Indicate whether an asynchronous data fetch is happening.
isValid	boolean	false	Adds the is-valid classname to the form-control. Only affects Bootstrap 4.
labelKey	string | function	'label'	See full documentation in the Rendering section.
onChange	function		Invoked when the set of selections changes (ie: an item is added or removed). For consistency, selected is always an array of selections, even if multi-selection is not enabled. (selected: Array<Object|string>) => void
onInputChange	function		Invoked when the input value changes. Receives the string value of the input (text), as well as the original event. (text: string, event: Event) => void
onBlur, onFocus, onKeyDown	function		As with a normal text input, these are called when the typeahead input has blur, focus, or keydown events. (event: Event) => void
onMenuToggle	function		Invoked when menu visibility changes. (isOpen: boolean) => void
onPaginate	function		Invoked when the pagination menu item is clicked. Receives an event as the first argument and the number of shown results as the second. (event: Event, shownResults: number) => void
open	boolean		Whether or not the menu should be displayed. undefined allows the component to control visibility, while true and false show and hide the menu, respectively.
options required	Array<Object|string>		Full set of options, including any pre-selected options.
paginate	boolean	true	Give user the ability to display additional results if the number of results exceeds maxResults.
paginationText	string	'Display additional results...'	Prompt displayed when large data sets are paginated.
placeholder	string		Placeholder text for the input.
positionFixed	boolean	false	Whether to use fixed positioning for the menu, which is useful when rendering inside a container with overflow: hidden;. Uses absolute positioning by default.
renderInput	function		Callback for custom input rendering. See full documentation in the Rendering section.
renderMenu	function		Callback for custom menu rendering. See full documentation in the Rendering section.
renderMenuItemChildren	function		Callback for customized rendering of menu item contents. See full documentation in the Rendering section.
renderToken	function		Callback for custom token rendering. See full documentation in the Rendering section.
selected	Array<Object|string>	[]	The selected option(s) displayed in the input. Use this prop if you want to control the component via its parent.
selectHint	function		Callback function that determines whether the hint should be selected. (shouldSelectHint: boolean, KeyboardEvent<HTMLInputElement>) => boolean
size	'lg' | 'sm'		Specify the size of the input.

Children

In addition to the props listed above, Typeahead also accepts either children or a child render function.

<Typeahead ... >
  <div>Render me!</div>
</Typeahead>

The render function receives partial internal state from the component:

<Typeahead ... >
  {(state) => (
    <div>Render me!</div>
  )}
</Typeahead>

This may be useful for things like customizing the loading indicator or clear button, or including an announcer for accessibility purposes.

<AsyncTypeahead>

An enhanced version of the normal Typeahead component for use when performing asynchronous searches. Provides debouncing of user input, optional query caching, and search prompt, empty results, and pending request behaviors.

<AsyncTypeahead
  isLoading={this.state.isLoading}
  labelKey={option => `${option.login}`}
  onSearch={(query) => {
    this.setState({isLoading: true});
    fetch(`https://api.github.com/search/users?q=${query}`)
      .then(resp => resp.json())
      .then(json => this.setState({
        isLoading: false,
        options: json.items,
      }));
  }}
  options={this.state.options}
/>

Note that this component is the same as:

import { Typeahead, withAsync } from 'react-bootstrap-typeahead';

const AsyncTypeahead = withAsync(Typeahead);

Props

Name	Type	Default	Description
delay	number	200	Delay, in milliseconds, before performing search.
isLoading required	boolean		Whether or not an asynchronous request is in progress.
onSearch required	function		Callback to perform when the search is executed, where query is the input string. (query: string) => void
options	Array<Object|string>	[]	Options to be passed to the typeahead. Will typically be the query results, but can also be initial default options.
promptText	node	'Type to search...'	Message displayed in the menu when there is no user input.
searchText	node	'Searching...'	Message to display in the menu while the request is pending.
useCache	bool	true	Whether or not the component should cache query results.

<Highlighter>

Component for highlighting substring matches in the menu items.

<Typeahead
  ...
  renderMenuItemChildren={(option, props, idx) => (
    <Highlighter search={props.text}>
      {option[props.labelKey]}
    </Highlighter>
  )}
/>

Props

Name	Type	Default	Description
children (required)	string		Highlighter expects a string as the only child.
highlightClassName	string	'rbt-highlight-text'	Classname applied to the highlighted text.
search (required)	string		The substring to look for. This value should correspond to the input text of the typeahead and can be obtained via the onInputChange prop or from the text property of props being passed down via renderMenu or renderMenuItemChildren.

<Hint>

The Hint component can be used to wrap custom inputs.

<Typeahead
  ...
  renderInput={({ inputRef, referenceElementRef ...inputProps }) => (
    <Hint>
      <FloatingLabel controlId="name" label="Name">
        <Form.Control
          {...inputProps}
          ref={(node) => {
            inputRef(node);
            referenceElementRef(node);
          }}
          type="text"
        />
      </FloatingLabel>
    </Hint>
  )}
/>

Props

Name	Type	Default	Description
children (required)	node

<Input>

Abstract <input> component that handles an inputRef prop and is used as the basis for both single- and multi-select input components.

<Menu>

Provides the markup for a Bootstrap menu, along with some extra functionality for specifying a label when there are no results.

Name	Type	Default	Description
emptyLabel	node	'No matches found.'	Message to display in the menu if there are no valid results.
id required	string | number		Id value required for accessibility.
maxHeight	string	'300px'	Maximum height of the dropdown menu.

<MenuItem>

Provides the markup for a Bootstrap menu item, but is wrapped by the withItem HOC to ensure proper behavior within the typeahead context. Provided for use if a more customized Menu is desired.

Props

Name	Type	Default	Description
option (required)	Object | string		The data item to be displayed.
position	number		The position of the item as rendered in the menu. Allows the top-level Typeahead component to be be aware of the item's position despite any custom ordering or grouping in renderMenu. Note: The value must be a unique, zero-based, sequential integer for proper behavior when keying through the menu.

<TypeaheadInputSingle> & <TypeaheadInputMulti>

Input components that handles single- and multi-selections, respectively. In the multi-select component, selections are rendered as children.

Props

Name	Type	Default	Description
disabled	boolean	false	Whether or not the input component is disabled.

<TypeaheadMenu>

The default menu which is rendered by the Typeahead component. Can be used in a custom renderMenu function for wrapping or modifying the props passed to it without having to re-implement the default functionality.

Props

Name	Type	Default	Description
labelKey required	string | function		See full documentation in the Rendering section.
newSelectionPrefix	string	'New selection: '	Provides the ability to specify a prefix before the user-entered text to indicate that the selection will be new. No-op unless allowNew={true}.
paginationText	string	'Display additional results...'	Prompt displayed when large data sets are paginated.
renderMenuItemChildren	function		Provides a hook for customized rendering of menu item contents.
text required	string		The current value of the typeahead's input.

<Token>

Individual token component, most commonly for use within renderToken to customize the Token contents.

Props

Name	Type	Default	Description
option (required)	Object | string		The data item to be displayed.
disabled	boolean	false	Whether the token is in a disabled state. If true it will not be interactive or removeable.
href	string		If provided, the token will be rendered with an <a> tag and href attribute.
readOnly	boolean	false	Whether the token is in a read-only state. If true it will not be removeable, but it will be interactive if provided an href.
tabIndex	number	0	Allows the tabindex to be set if something other than the default is desired.

Higher-Order Components & Hooks

useAsync & withAsync

The HOC used in AsyncTypeahead.

useItem & withItem

Connects individual menu items with the main typeahead component via context and abstracts a lot of complex functionality required for behaviors like keying through the menu and input hinting. Also provides onClick behavior and active state.

If you use your own menu item components (in renderMenu for example), you are strongly advised to use either the hook or the HOC:

import { MenuItem } from 'react-bootstrap';
import { Menu, Typeahead, useItem, withItem } from 'react-bootstrap-typeahead';

const Item = withItem(MenuItem);

// OR

const Item = (props) => <MenuItem {...useItem(props)} />;

<Typeahead
  renderMenu={(results, menuProps) => (
    <Menu {...menuProps}>
      {results.map((option, position) => (
        <Item option={option} position={position}>
          {option.label}
        </Item>
      ))}
    </Menu>
  )}
/>

useToken & withToken

Encapsulates keystroke and outside click behaviors used in Token. Useful if you want completely custom markup for the token. The hook and the HOC provide the following props to be consumed by the token component:

Name	Type	Description
active	boolean	Whether the token is active or not. Useful for adding an "active" classname to the component for styling.
onBlur	function	Callback invoked when the token loses focus. Should be applied to the top-level element.
onClick	function	Callback invoked when the token is clicked. Should be applied to the top-level element.
onFocus	function	Callback invoked when the token is focused. Should be applied to the top-level element.
onKeyDown	function	Callback invoked when the token is focused and a key is pressed. Should be applied to the top-level element.
onRemove	function	Callback used to handle token removal. This typically would be applied to the onClick handler of a "remove" or "x" button in the token.
ref	Used for detecting clicks outside the token and updating internal state accordingly. Should be applied to the top-level DOM node.

// Important: use `forwardRef` to pass the ref on to the underlying DOM nodes.
const MyToken = forwardRef(({ active, onRemove, ...props }, ref) => (
  <div
    {...props}
    className={active ? 'active' : ''}
    ref={ref}>
    <button onClick={onRemove}>
      x
    </button>
  </div>
));

// HOC
const CustomToken = withToken(MyToken);

// Hook
const CustomToken = (props) => <MyToken {...useToken(props)} />;

If using the hook, you can also apply it directly within your token component:

const MyToken = (props) => {
  const { active, onRemove, ref, ...otherProps } = useToken(props);

  return (
    <div
      {...otherProps}
      className={active ? 'active' : ''}
      ref={ref}>
      <button onClick={onRemove}>
        x
      </button>
    </div>
  );
};

useHint

Hook for adding a hint to a custom input. Mainly useful if you'd like to customize the hint's markup.

const CustomHint = (props) => {
  const { hintRef, hintText } = useHint(props);

  return (
    <div ... >
      {props.children}
      <input
        ...
        ref={hintRef}
        value={hintText}
      />
    </div>
  );
};

See the Hint component for an example of how to apply useHint.