If you’re looking for an autocomplete JavaScript library to enhance the select & input behaviors on web applications. You have come to the right place.
This is a hand-picked list that is updated every year and showcases the 7 best pure (vanilla) JavaScript autocomplete libraries of the year.
Feel free to download and use them in your next web app design to apply the autocomplete functionality to the existing input field or select box. Have fun with it.
Originally Published May 25 2020, updated Mar 24, 2022
1. Fast Autocomplete/Typeahead Library For Bootstrap 5
This is the upgraded version of the Bootstrap 4 Autocomplete plugin that enables a blazing fast autocomplete/typeahead functionality on Bootstrap 5 inputs.
2. Fast Autocomplete Dropdown For Input Field – autocomplete.js
A vanilla JavaScript autocomplete library that attaches a blazing fast autocomplete dropdown list to your input field while typing.
3. Easy Autocomplete Library For Bootstrap 5 – autocompleteBS
A simple and configurable autocomplete JavaScript library created especially for the latest Bootstrap 5 framework.

4. @Mention Autocomplete For Text Field – js-mention
A small JavaScript plugin that adds the @mention autocomplete functionality to a text field you specify. Can be used to mention someone in a text message.
5. Fast Autocomplete & Typeahead Library – autoComplete.js
A dynamic, blazing-fast, dependency-free, and easy-to-use autocomplete & typeahead JavaScript library for modern web development.
6. Accessible Autocomplete Component In Vanilla JavaScript – Autocomplete
A fast, dynamic, accessible (WAI-ARIA) compliant autocomplete component written in vanilla JavaScript.
7. Lightweight Flexible Pure JavaScript Autocomplete Library

A pure vanilla JavaScript library to provide flexible autocomplete/autosuggest dropdown to your input field as typing. Supports local data or remote source via AJAX.
More Resources:
To find more JavaScript libraries to enhance your select boxes on the web app, don’t forget to check out our other awesome resources.