Simple Svelte Autocomplete

Autocomplete / Select / Typeahead component made with Svelte based on https://github.com/tborychowski/svelte-autocomplete

• no dependencies
• use plain lists or array of objects
• option to define a label field or function
• option to define more fields used for search

See live demo at http://simple-svelte-autocomplete.surge.sh/

Install the component:

npm i -D simple-svelte-autocomplete

Import the component and define items:

import AutoComplete from "simple-svelte-autocomplete";

const colors = ["White", "Red", "Yellow", "Green", "Blue", "Black"];
let selectedColor;

And use it like this:

<AutoComplete items={colors} bind:selectedItem={selectedColor} />

You can also use it with array of objects:

const colorList = [
  { id: 1, name: "White", code: "#FFFFFF" },
  { id: 2, name: "Red", code: "#FF0000" },
  { id: 3, name: "Yellow", code: "#FF00FF" },
  { id: 4, name: "Green", code: "#00FF00" },
  { id: 5, name: "Blue", code: "#0000FF" },
  { id: 6, name: "Black", code: "#000000" }
];

let selectedColorObject;

Just define which field should be used as label:

<AutoComplete
  items={colorList}
  bind:selectedItem={selectedColorObject}
  labelFieldName="name" />

Specifying function for label instead of field name is also supported:

<AutoComplete
  items={colorList}
  bind:selectedItem={selectedColorObject}
  labelFunction={color => color.id + '. ' + color.name} />

By default the component searches by the item label, but it can also search by custom fields by specifying keywords function. For example to enable searching by color name and color HEX code:

<AutoComplete
  items={colorList}
  bind:selectedItem={selectedColorObject}
  labelFieldName="name"
  keywordsFunction={color => color.name + ' ' + color.code} />

Props

Props you may want to specify include:

• className - apply a className to the control
• disabled - disable the control
• name - generate an HTML input with this name, containing the current value
• placeholder - change the text displayed when no option is selected
• beforeChange - function called before a new value is selected
• onChange - function called after new value is selected
• items - array of items the user can select from
• selectedItem - the current item that is selected (object if the array of items contains objects)
• labelFieldName - the name of the field to be used for showing the items as text in the droprown
• keywordsFieldName - the name of the filed to search by
• value - derived value from the selectedItem, equals to selectedItem if valueFieldName is not specified
• valueFieldName - field to use to derive the value from the selected item
• labelFunction - optional function that creates label from the item. If used labelFieldName is ignored
• keywordsFunction - optional function that creates text to search from the item. If used keywordsFieldName is ignored
• valueFunction - optional function that derives the value from the selected item. If used valueFieldName is ignored
• keywordsCleanFunction - optional function to additionally process the derived keywords from the item
• textCleanFunction - optional function to additionally process the user entered text
• selectFirstIfEmpty - set to true to select the first item if the user clears the text and closes the dropdown. Defaults to false.
• minCharactersToSearch - minimum length of search text to perform search, defaults to 1
• maxItemsToShowInList - maximum number of items to show in the dropdown list, defaults 0 (no limit)
• noResultsText - text to show in the dropdown when the search text does not match any item. Defaults to "No results found". Can be set to "" to not show anything.
• debug - flag to enable detailed log statements from the component

Style

The component is inteded to use with Builma but it can be adapted to use Boostrap or anything else.