alexmattson-react-select

React-Select

A Select control built with and for React. Initially built for use in KeystoneJS.

New version 1.0.0-rc

I've nearly completed a major rewrite of this component (see issue #568 for details and progress). The new code has been merged into master, and react-select@1.0.0-rc.10 has been published to npm and bower.

1.0.0 has some breaking changes. The documentation is still being updated for the new API; notes on the changes can be found in CHANGES.md and will be finalised into HISTORY.md soon.

Testing, feedback and PRs for the new version are appreciated.

Demo & Examples

Live demo: jedwatson.github.io/react-select

The live demo is still running v0.9.1.

To build the new 1.0.0 examples locally, clone this repo then run:

npm install
npm start

Then open localhost:8000 in a browser.

Installation

The easiest way to use React-Select is to install it from NPM and include it in your own React build process (using Browserify, etc).

npm install react-select --save

At this point you can import react-select and its styles in your application as follows:

import Select from 'react-select';

// Be sure to include styles at some point, probably during your bootstrapping
import 'react-select/dist/react-select.css';

You can also use the standalone UMD build by including dist/react-select.js and dist/react-select.css in your page. If you do this you'll also need to include the dependencies. For example:

<script src="https://unpkg.com/react@15.6.1/dist/react.js"></script>
<script src="https://unpkg.com/react-dom@15.6.1/dist/react-dom.js"></script>
<script src="https://unpkg.com/prop-types@15.5.10/prop-types.js"></script>
<script src="https://unpkg.com/classnames@2.2.5/index.js"></script>
<script src="https://unpkg.com/react-input-autosize@2.0.0/dist/react-input-autosize.js"></script>
<script src="https://unpkg.com/react-select/dist/react-select.js"></script>

<link rel="stylesheet" href="https://unpkg.com/react-select/dist/react-select.css">

Usage

React-Select generates a hidden text field containing the selected value, so you can submit it as part of a standard form. You can also listen for changes with the onChange event property.

Options should be provided as an Array of Objects, each with a value and label property for rendering and searching. You can use a disabled property to indicate whether the option is disabled or not.

The value property of each option should be set to either a string or a number.

When the value is changed, onChange(selectedValueOrValues) will fire.

var Select = require('react-select');

var options = [
  { value: 'one', label: 'One' },
  { value: 'two', label: 'Two' }
];

function logChange(val) {
  console.log("Selected: " + JSON.stringify(val));
}

<Select
  name="form-field-name"
  value="one"
  options={options}
  onChange={logChange}
/>

Custom classNames

You can provide a custom className prop to the <Select> component, which will be added to the base .Select className for the outer container.

The built-in Options renderer also support custom classNames, just add a className property to objects in the options array.

Multiselect options

You can enable multi-value selection by setting multi={true}. In this mode:

• Selected options will be removed from the dropdown menu
• The selected values are submitted in multiple <input type="hidden"> fields, use joinValues to submit joined values in a single field instead
• The values of the selected items are joined using the delimiter prop to create the input value when joinValues is true
• A simple value, if provided, will be split using the delimiter prop
• The onChange event provides an array of selected options or a comma-separated string of values (eg "1,2,3") if simpleValue is true
• By default, only options in the options array can be selected. Use the Creatable Component (which wraps Select) to allow new options to be created if they do not already exist. Hitting comma (','), ENTER or TAB will add a new option. Versions 0.9.x and below provided a boolean attribute on the Select Component (allowCreate) to achieve the same functionality. It is no longer available starting with version 1.0.0.
• By default, selected options can be cleared. To disable the possibility of clearing a particular option, add clearableValue: false to that option:

var options = [
  { value: 'one', label: 'One' },
  { value: 'two', label: 'Two', clearableValue: false }
];

Note: the clearable prop of the Select component should also be set to false to prevent allowing clearing all fields at once

Async options

If you want to load options asynchronously, instead of providing an options Array, provide a loadOptions Function.

The function takes two arguments String input, Function callbackand will be called when the input text is changed.

When your async process finishes getting the options, pass them to callback(err, data) in a Object { options: [] }.

The select control will intelligently cache options for input strings that have already been fetched. The cached result set will be filtered as more specific searches are input, so if your async process would only return a smaller set of results for a more specific query, also pass complete: true in the callback object. Caching can be disabled by setting cache to false (Note that complete: true will then have no effect).

Unless you specify the property autoload={false} the control will automatically load the default set of options (i.e. for input: '') when it is mounted.

var Select = require('react-select');

var getOptions = function(input, callback) {
  setTimeout(function() {
    callback(null, {
      options: [
        { value: 'one', label: 'One' },
        { value: 'two', label: 'Two' }
      ],
      // CAREFUL! Only set this to true when there are no more options,
      // or more specific queries will not be sent to the server.
      complete: true
    });
  }, 500);
};

<Select.Async
    name="form-field-name"
    loadOptions={getOptions}
/>

Async options with Promises

loadOptions supports Promises, which can be used in very much the same way as callbacks.

Everything that applies to loadOptions with callbacks still applies to the Promises approach (e.g. caching, autoload, ...)

An example using the fetch API and ES6 syntax, with an API that returns an object like:

import Select from 'react-select';

/*
 * assuming the API returns something like this:
 *   const json = [
 *      { value: 'one', label: 'One' },
 *      { value: 'two', label: 'Two' }
 *   ]
 */

const getOptions = (input) => {
  return fetch(`/users/${input}.json`)
    .then((response) => {
      return response.json();
    }).then((json) => {
      return { options: json };
    });
}

<Select.Async
  name="form-field-name"
  value="one"
  loadOptions={getOptions}
/>

Async options loaded externally

If you want to load options asynchronously externally from the Select component, you can have the Select component show a loading spinner by passing in the isLoading prop set to true.

var Select = require('react-select');

var isLoadingExternally = true;

<Select
  name="form-field-name"
  isLoading={isLoadingExternally}
  ...
/>

User-created tags

The Creatable component enables users to create new tags within react-select. It decorates a Select and so it supports all of the default properties (eg single/multi mode, filtering, etc) in addition to a couple of custom ones (shown below). The easiest way to use it is like so:

import { Creatable } from 'react-select';

function render (selectProps) {
  return <Creatable {...selectProps} />;
};

Creatable properties

Property	Type	Description
children	function	Child function responsible for creating the inner Select component. This component can be used to compose HOCs (eg Creatable and Async). Expected signature: (props: Object): PropTypes.element
isOptionUnique	function	Searches for any matching option within the set of options. This function prevents duplicate options from being created. By default this is a basic, case-sensitive comparison of label and value. Expected signature: ({ option: Object, options: Array, labelKey: string, valueKey: string }): boolean
isValidNewOption	function	Determines if the current input text represents a valid option. By default any non-empty string will be considered valid. Expected signature: ({ label: string }): boolean
newOptionCreator	function	Factory to create new option. Expected signature: ({ label: string, labelKey: string, valueKey: string }): Object
onNewOptionClick	function	new option click handler, it calls when new option has been selected. function(option) {}
shouldKeyDownEventCreateNewOption	function	Decides if a keyDown event (eg its keyCode) should result in the creation of a new option. ENTER, TAB and comma keys create new options by default. Expected signature: ({ keyCode: number }): boolean
promptTextCreator	function	Factory for overriding default option creator prompt label. By default it will read 'Create option "{label}"'. Expected signature: (label: String): String

Combining Async and Creatable

Use the AsyncCreatable HOC if you want both async and creatable functionality. It ties Async and Creatable components together and supports a union of their properties (listed above). Use it as follows:

import React from 'react';
import { AsyncCreatable } from 'react-select';

function render (props) {
  // props can be a mix of Async, Creatable, and Select properties
  return (
    <AsyncCreatable {...props} />
  );
}

Filtering options

You can control how options are filtered with the following properties:

• matchPos: "start" or "any": whether to match the text entered at the start or any position in the option value
• matchProp: "label", "value" or "any": whether to match the value, label or both values of each option when filtering
• ignoreCase: Boolean: whether to ignore case or match the text exactly when filtering
• ignoreAccents: Boolean: whether to ignore accents on characters like ø or å

matchProp and matchPos both default to "any". ignoreCase defaults to true. ignoreAccents defaults to true.

Advanced filters

You can also completely replace the method used to filter either a single option, or the entire options array (allowing custom sort mechanisms, etc.)

• filterOption: function(Object option, String filter) returns Boolean. Will override matchPos, matchProp, ignoreCase and ignoreAccents options.
• filterOptions: function(Array options, String filter, Array currentValues) returns Array filteredOptions. Will override filterOption, matchPos, matchProp, ignoreCase and ignoreAccents options.

For multi-select inputs, when providing a custom filterOptions method, remember to exclude current values from the returned array of options.

Filtering large lists

The default filterOptions method scans the options array for matches each time the filter text changes. This works well but can get slow as the options array grows to several hundred objects. For larger options lists a custom filter function like react-select-fast-filter-options will produce better results.

Efficiently rendering large lists with windowing

The menuRenderer property can be used to override the default drop-down list of options. This should be done when the list is large (hundreds or thousands of items) for faster rendering. Windowing libraries like react-virtualized can then be used to more efficiently render the drop-down menu like so. The easiest way to do this is with the react-virtualized-select HOC. This component decorates a Select and uses the react-virtualized VirtualScroll component to render options. Demo and documentation for this component are available here.

You can also specify your own custom renderer. The custom menuRenderer property accepts the following named parameters:

Parameter	Type	Description
focusedOption	Object	The currently focused option; should be visible in the menu by default.
focusOption	Function	Callback to focus a new option; receives the option as a parameter.
labelKey	String	Option labels are accessible with this string key.
optionClassName	String	The className that gets used for options
optionComponent	ReactClass	The react component that gets used for rendering an option
optionRenderer	Function	The function that gets used to render the content of an option
options	Array<Object>	Ordered array of options to render.
selectValue	Function	Callback to select a new option; receives the option as a parameter.
valueArray	Array<Object>	Array of currently selected options.

Updating input values with onInputChange

You can manipulate the input by providing a onInputChange callback that returns a new value. Please note: When you want to use onInputChange only to listen to the input updates, you still have to return the unchanged value!

function cleanInput(inputValue) {
    // Strip all non-number characters from the input
    return inputValue.replace(/[^0-9]/g, "");
}   

<Select
    name="form-field-name"
    onInputChange={cleanInput}
/>

Overriding default key-down behavior with onInputKeyDown

Select listens to keyDown events to select items, navigate drop-down list via arrow keys, etc. You can extend or override this behavior by providing a onInputKeyDown callback.

function onInputKeyDown(event) {
    switch (event.keyCode) {
        case 9:   // TAB
            // Extend default TAB behavior by doing something here
            break;
        case 13: // ENTER
            // Override default ENTER behavior by doing stuff here and then preventing default
            event.preventDefault();
            break;
    }
}

<Select
    {...otherProps}
    onInputKeyDown={onInputKeyDown}
/>

Further options

Property	Type	Default	Description
addLabelText	string	'Add "{label}"?'	text to display when allowCreate is true
arrowRenderer	func	undefined	Renders a custom drop-down arrow to be shown in the right-hand side of the select: arrowRenderer({ onMouseDown, isOpen })
autoBlur	bool	false	Blurs the input element after a selection has been made. Handy for lowering the keyboard on mobile devices
autofocus	bool	undefined	autofocus the component on mount
autoload	bool	true	whether to auto-load the default async options set
autosize	bool	true	If enabled, the input will expand as the length of its value increases
backspaceRemoves	bool	true	whether pressing backspace removes the last item when there is no input value
backspaceToRemoveMessage	string	'Press backspace to remove {last label}'	prompt shown in input when at least one option in a multiselect is shown, set to '' to clear
cache	bool	true	enables the options cache for asyncOptions (default: true)
className	string	undefined	className for the outer element
clearable	bool	true	should it be possible to reset value
clearAllText	string	'Clear all'	title for the "clear" control when multi is true
clearRenderer	func	undefined	Renders a custom clear to be shown in the right-hand side of the select when clearable true: clearRenderer()
clearValueText	string	'Clear value'	title for the "clear" control
closeOnSelect	bool	true	whether to close the menu when a value is selected
deleteRemoves	bool	true	whether pressing delete key removes the last item when there is no input value
delimiter	string	','	delimiter to use to join multiple values
disabled	bool	false	whether the Select is disabled or not
filterOption	func	undefined	method to filter a single option: function(option, filterString)
filterOptions	func	undefined	method to filter the options array: function([options], filterString, [values])
ignoreAccents	bool	true	whether to strip accents when filtering
ignoreCase	bool	true	whether to perform case-insensitive filtering
inputProps	object	{}	custom attributes for the Input (in the Select-control) e.g: {'data-foo': 'bar'}
isLoading	bool	false	whether the Select is loading externally or not (such as options being loaded)
joinValues	bool	false	join multiple values into a single hidden input using the delimiter
labelKey	string	'label'	the option property to use for the label
loadOptions	func	undefined	function that returns a promise or calls a callback with the options: function(input, [callback])
matchPos	string	'any'	(any, start) match the start or entire string when filtering
matchProp	string	'any'	(any, label, value) which option property to filter on
menuBuffer	number	0	buffer of px between the base of the dropdown and the viewport to shift if menu doesnt fit in viewport
menuRenderer	func	undefined	Renders a custom menu with options; accepts the following named parameters: menuRenderer({ focusedOption, focusOption, options, selectValue, valueArray })
multi	bool	undefined	multi-value input
name	string	undefined	field name, for hidden <input /> tag
noResultsText	string	'No results found'	placeholder displayed when there are no matching search results or a falsy value to hide it (can also be a react component)
onBlur	func	undefined	onBlur handler: function(event) {}
onBlurResetsInput	bool	true	whether to clear input on blur or not
onChange	func	undefined	onChange handler: function(newValue) {}
onClose	func	undefined	handler for when the menu closes: function () {}
onCloseResetsInput	bool	true	whether to clear input when closing the menu through the arrow
onFocus	func	undefined	onFocus handler: function(event) {}
onInputChange	func	undefined	onInputChange handler/interceptor: function(inputValue: string): string
onInputKeyDown	func	undefined	input keyDown handler; call event.preventDefault() to override default Select behavior: function(event) {}
onOpen	func	undefined	handler for when the menu opens: function () {}
onSelectResetsInput	bool	true	whether the input value should be reset when options are selected, for multi
onValueClick	func	undefined	onClick handler for value labels: function (value, event) {}
openOnClick	bool	true	open the options menu when the control is clicked (requires searchable = true)
openOnFocus	bool	false	open the options menu when the control gets focus (requires searchable = true)
optionRenderer	func	undefined	function which returns a custom way to render the options in the menu
options	array	undefined	array of options
placeholder	string|node	'Select ...'	field placeholder, displayed when there's no value
required	bool	false	applies HTML5 required attribute when needed
resetValue	any	null	value to set when the control is cleared
scrollMenuIntoView	bool	true	whether the viewport will shift to display the entire menu when engaged
searchable	bool	true	whether to enable searching feature or not
searchPromptText	string|node	'Type to search'	label to prompt for search input
loadingPlaceholder	string|node	'Loading...'	label to prompt for loading search result
tabSelectsValue	bool	true	whether to select the currently focused value when the [tab] key is pressed
value	any	undefined	initial field value
valueComponent	func		function which returns a custom way to render/manage the value selected <CustomValue />
valueKey	string	'value'	the option property to use for the value
valueRenderer	func	undefined	function which returns a custom way to render the value selected function (option) {}

Methods

Right now there's simply a focus() method that gives the control focus. All other methods on <Select> elements should be considered private and prone to change.

// focuses the input element
<instance>.focus();

Contributing

See our CONTRIBUTING.md for information on how to contribute.

Thanks to the projects this was inspired by: Selectize (in terms of behaviour and user experience), React-Autocomplete (as a quality React Combobox implementation), as well as other select controls including Chosen and Select2.

License

MIT Licensed. Copyright (c) Jed Watson 2017.