README
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
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 build by including react-select.js
and react-select.css
in your page. (If you do this though you'll also need to include the dependencies.) For example:
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://unpkg.com/classnames/index.js"></script>
<script src="https://unpkg.com/react-input-autosize/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 Object
s, 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: " + val);
}
<Select
name="form-field-name"
value="one"
options={options}
onChange={logChange}
/>
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, usejoinValues
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 whenjoinValues
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"
) ifsimpleValue
is true - By default, only options in the
options
array can be selected. Use theCreatable
Component (which wrapsSelect
) to allow new options to be created if they do not already exist. Hitting comma (','), ENTER or TAB will add a new option. Versions0.9.x
and below provided a boolean attribute on theSelect
Component (allowCreate
) to achieve the same functionality. It is no longer available starting with version1.0.0
. - 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 callback
and 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 valuematchProp
:"label"
,"value"
or"any"
: whether to match the value, label or both values of each option when filteringignoreCase
:Boolean
: whether to ignore case or match the text exactly when filtering
matchProp
and matchPos
both default to "any"
.
ignoreCase
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)
returnsBoolean
. Will overridematchPos
,matchProp
andignoreCase
options.filterOptions
:function(Array options, String filter, Array currentValues)
returnsArray filteredOptions
. Will overridefilterOption
,matchPos
,matchProp
andignoreCase
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.
Effeciently 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 using the onInputChange and returning a new 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 })
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
clearValueText |string|'Clear value'|title for the "clear" control
resetValue |any|null|value to use when you clear the control
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])
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
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: function(inputValue) {}
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 () {}
onValueClick|func|undefined|onClick handler for value labels: function (value, event) {}
openOnFocus | bool | false | open the options menu when the input 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
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
tabSelectsValue|bool|true|whether to select the currently focused value when the [tab]
key is pressed
value |any|undefined|initial field value
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 2016.