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Vanilla JS Token Autocomplete Input

Small demo: click here

Parameters

Name Description Default
selector A selector query string pointing to the div the field should be rendered in ''
name The name that should be used for the hidden input and when sending the selection as form parameters ''
noMatchesText An optional text that will be displayed when no suggestions were found for the text input null
noMatchesCustomEntriesDescription An optional text that will be displayed when no suggestions were found for the text input and custom entries are allowed null
placeholderText An optional text that will be displayed when no text was entered in the input area 'enter some text'
initialTokens An optional array of strings for the initial tokens when initial option elements arent provided null
initialSuggestions An optional array of strings for the initial autocomplete suggestions when initial option elements arent provided null
tokenRenderer Function which creates custom DOM elements for each displayed token. TokenAutocomplete.MultiSelect.defaultRenderer
minCharactersForSuggestion The minimum number of letters the user has to enter after which autocompletion is triggered 1
selectMode One of the predefined select modes, defining the behaviour of the token field (SINGLE, MULTI, SEARCH) SelectModes.MULTI
suggestionsUri An optional URI which when defined is called to provide suggestions for the text entered by the user ''
suggestionsUriBuilder A function which is called before sending the suggestions request so the URI can be altered/updated. (query) -> return this.suggestionsUri + '?query=' + query
suggestionRenderer Function which creates the DOM element for each displayed suggestion. TokenAutocomplete.Autocomplete.defaultRenderer
allowCustomEntries If true, the user can enter custom values which are not part of the suggestions. true
readonly If true, the user can not enter any text or select any suggestions. false
optional If true, the user can clear the field and no value will be submitted. false
enableTabulator If true, the user can select a suggestion by pressing the tab key. true
showSuggestionsOnFocus If true, the suggestions are shown when the input field receives focus. true
requestDelay The delay in milliseconds before a request for suggestions is sent after the user entered text 200

Events

The TokenAutocomplete instance will emit the following events on the DOM element specified by the selector parameter:

query-changed

This event is emitted when the text in the input field was changed externally (not by the user directly). The event details contain the current query:

Name Type Description
query string The current query entered by user.

tokens-changed

This event is emitted when the tokens in the field change (non-silently). In a multi-select field, this happens when a token is added or removed. In a single-select field, this happens when the selected token changes. The event details contain the current tokens and what was changed:

Name Type Description
tokens Array or Token or null The current tokens in the field after the operation
added Token or null The token that was added
removed Token or null The token that was removed

suggestion-selected

This event is emitted when a suggestion is selected by the user. The event details contain the selected suggestion:

Name Type Description
value string The raw value of the selected suggestion
text string The display label of the selected suggestion
type string or null The type of the selected suggestion

Build / Development

Install typescript:

brew install typescript

Change .ts file as necessary.

Run TypeScript build in the main project directory:

tsc

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Customizable token autocomplete input field built in vanilla js

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