Svelecte

Note

Svelte 5 compatible version available. More complete code update in progress.

npm i svelecte@next

Flexible autocomplete/select component written in Svelte. Initially inspired by Selectize.js. Also usable as custom element. Usable in forms, behaves very similar to standard <select> element.

See the latest changes on the Releases page.

📃 Features

• searchable
• multiselect with limit of max selected items
• allow simple array or complex objects as items
• custom item renderer (formatter)
• allow creating new items (and possibly edit them)
• remote data fetch
• virtual list support
• i18n and basic ARIA support
• SSR support
• client-validation support (tested with sveltekit-superforms)
• lazy dropdown rendering
• usable as custom element
• customizable styling
• dnd intergration with svelte-dnd-action

🔧 Installation

npm install svelecte --save

Minimalistic example

<script>
import Svelecte from 'svelecte';

const list = [{ id: 1, name: 'Item 1' }, { id: 2, name: 'Item 2'}, ...];
let myValue = null;
</script>

<Svelecte options={list} bind:value={myValue}></Svelecte>

Properties

Property	Type	Default	Description
name	string	'svelecte'	Create internal <select> element. Without name defined, no <select> is created
inputId	string	null	Allow targeting input using a html ID. Otherwise it is based on name property
required	bool	false	Make sense only when name is defined and you work with it as standard <select> element
disabled	bool	false	Disable component
options	array	[]	Option list, see Options for more info
optionResolver	function	undefined	Custom option resolver. Enabling "query mode". Check the example on Options page
value	string,object	null	Bound value property. For multiple is always array
valueAsObject	bool	false	Switch whether Svelecte should expects from and return to bind:value objects or primitive value (usually string, number)
parentValue	string	undefined	Value which this component depends on. When parentValue is null, component is disabled. There is an example on Remote Datasource page.
valueField	string	null	Property to be used as value (if not specified, will be resolved automatically)
labelField	string	null	Property shown in dropdown (if not specified, will be resolved automatically)
groupLabelField	string	label	Property to be used as optgroup label
groupItemsField	string	options	Property holding optgroup option list
disabledField	string	$disabled	Property to check, whether given options should be disabled and unselectable
placeholder	string	Select	Input placeholder
searchable	bool	true	Allow search among items by typing
clearable	bool	false	Display ✖ icon to clear whole selection
renderer	mixed	null	Dropdown and selection renderer function. More on Rendering page
disableHighlight	bool	false	Disable highlighting of input value in results. Can be useful with a renderer function that includes additional text or does its own highlighting
highlightFirstItem	bool	true	Automatically highlight the first item in the list when the dropdown opens
selectOnTab	bool,string	null	Based on value provided, it allows selecting currently active item by Tab AND (if value is 'select-navigate') also focus next input.
resetOnBlur	bool	true	Control if input value should be cleared on blur
resetOnSelect	bool	true	Control if input value should be cleared on item selection. Note: applicable only with multiple
closeAfterSelect	bool	'auto'	closes dropdown after selection. Setting this to true is useful for multiple select only. For single select dropdown is always closed no matter the value this property has
strictMode	bool	true	When true, passed value is checked whether exists on provided options array. If not, invalidValue event is dispatched
multiple	bool	false	allow multiselection. Will be set automatically to true, if name property ends with [], like tags[]
max	number	0	Maximum allowed items selected, applicable only for multiselect
collapseSelection	string	null	Whether selection should be collapsed and when, check Rendering for more info.
keepSelectionInList	bool	'auto'	Whether keep selected items in dropdown. auto for multiple removes selected items from dropdown
creatable	bool	false	Allow creating new item(s)
creatablePrefix	string	*	Prefix marking new item
allowEditing	bool	false	When pressing Backspace switch to edit mode instead of removing newly created item. NOTE intended to be used with creatable property
keepCreated	bool	true	Switch whether to add newly created option to option list or not
delimiter	string	,	split inserted text when pasting to create multiple items
createFilter	function	null	Function receiving inputValue returning bool checks if input string is valid or not. If you want to dismiss entered value (ie. prevent item creation), function should return true, false otherwise.
createHandler	function	null	Custom (may be) async function transforming input string to option object. Default returns object with valueField and labelField properties, where labelField's value is input string prefixed with creatablePrefix property.
fetch	string	null	Sets fetch URL. Visit [Remote datasource] form more details
fetchProps	object	null	Set options for new fetch Request
fetchCallback	function	null	optional fetch callback
fetchResetOnBlur	bool	true	reset previous search results on empty input, related to resetOnBlur
fetchDebounceTime	number	300	how many miliseconds is request debounced before fetch is executed
minQuery	number	1	Minimal amount of characters required to perform remote request. Usable with fetch property
lazyDropdown	bool	true	render dropdown after first focus, not by default
positionResolver	function	noop	(optional) Action for custom dropdown positioning.
virtualList	bool	false	Whether use virtual list for dropdown items (useful for large datasets)
vlHeight	number	null	Height of virtual list dropdown (if not specified, computed automatically)
vlItemSize	number	null	Height of one row (if not specified, computed automatically)
searchProps	object	null	Customize sifter.js settings. See Searching page for more details
class	string	svelecte-control	default css class
i18n	object	null	I18n object overriding default settings
dndzone	function	noop	Pass dndzone from svelte-dnd-action, see Examples page
validatorAction	array	null	Bind validator action for inner <select> element. Designed to be used with svelte-use-form, see Validation page. For this to work, name property MUST be defined
anchor_element	bool	null	internal: when passing also existing select (for custom element)

Available slots

For more info refer to Rendering page.

<slot name="icon" />
<slot name="collapsedSelection" let:selectedOptions let:i18n />
<slot name="selection" let:selectedOptions let:bindItem />
<slot name="clear-icon" let:selectedOptions let:inputValue />
<slot name="dropdown-toggle" let:isOpen />
<slot name="list-header" />
<slot name="option" let:item />
<slot name="create-row" let:isCreating let:inputValue let:i18n  />

Emitted events:

Event	arguments	description
fetch	options	newly fetched remote options
fetchError	error	dispatche on fetch error of any kind
change	selection	selected objects. If anchor property is defined, change event is called also on it
createoption	option	newly created option object
createFail	object	thrown if createHandler fails
focus	<input>	focus event
blur	<input>	blur event
invalidValue	invalidValue	triggered when passed value is out of provided options items. Internal (and bound, if any) value is set to null or [] if multiple
enterKey	underlying keyDown event	triggered when natively it would cause form submit (dropdown is closed). This gives you ability to prevent it by calling event.detail.preventDefault()

Public API:

Name	type	arguments	description
focus	function	-	focus input
refetchWith	function	new value

There are global config and addRenderer function available. Refer to Global config and Rendering page respectively.

I18n, a11y, CSS variables

Visit documentation for more details.

Thanks to

• selectize.js - main inspiration
• sifter - search engine
• svelte-tiny-virtual-list virtual list functionality
• and svelte of course 😊

And if you want to thank me, you can through my sponsor page.

License

MIT License