HeadJS

A JavaScript loader that loads scripts in parallel, but executes them in order.

date-fns

Provides the most comprehensive set of over 200 functions for manipulating dates in JavaScript.

Air Datepicker

A customizable datepicker written in pure JavaScript without any dependencies.

SignalR

A library for ASP.NET that enables real-time two-way communication between servers and clients.

Partytown

A lazy-loaded library to help relocate resource intensive scripts into a web worker, and off of the main thread.

Floating UI

An open-source JavaScript library and successor to Popper for creating interactive floating elements such as tooltips, popovers, and dropdowns.

Zepto

A lightweight and modular open-source JavaScript library with a largely jQuery-compatible API, designed for modern browsers and optimized for fast execution and small file size.

Rough.js

A small graphics library that lets you draw in a sketchy, hand-drawn style.

Apollo

A flexible, fully-featured caching GraphQL client for every platform.

Auth.js

An open-source authentication solution that integrates with Next.js, Nuxt, Qwik, and other modern JavaScript frameworks to handle user sign-in, session management, and access control.

Intro.js

A lightweight open-source JavaScript library for creating step-by-step onboarding tours in web applications.

SheetJS

A JavaScript library for reading and writing data from spreadsheets.

Pagefind

A fully static JavaScript search library that aims to perform well on large sites while using as little bandwidth as possible.

Hyperscript

A scripting language that allows developers to respond to events and perform simple DOM manipulation in code embedded directly in HTML elements.

Mo.js

An open-source, retina-ready, modular JavaScript motion graphics library.

A simpler rewrite of Google's libphonenumber library in JavaScript.

A small full-text search JavaScript library for use in the browser.

Babylon.js

A full-featured 3D game and rendering engine built on the WebGL platform.

Gijgo

An open-source set of JavaScript controls that includes grid, tree, dialog, dropdown, slider and date/time pickers.

Ruffle

An Adobe Flash Player emulator written in the Rust programming language.

DocSearch

A free search service designed for developer documentation websites.

Unpoly

A JavaScript framework that uses custom HTML attributes to build single-page application interfaces using server-rendered HTML.

Analytics.js

An open-source library that collects customer data and sends it to many different tools using an API from Segment CDP.

Vuex

An open-source state management library for Vue.js.

Lit

An open-source JavaScript library for building fast and lightweight web components, developed as the successor to Google's Polymer project.