From our inception, the jQuery Foundation has been about much more than just jQuery. We strive to provide a home for open source projects that are essential to, and support our vision of, making the web accessible to everyone. Check out what we provide for these projects and our philosophy around governance, budgets, trademarks and more. If you think your project fits into this group and want to talk about working with us, feel free to reach out any time.


jQuery Core

jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.


QUnit is a powerful, easy-to-use JavaScript unit testing framework. It's used by the jQuery, jQuery UI and jQuery Mobile projects and is capable of testing any generic JavaScript code, including itself!
jQuery UI

jQuery UI

jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control, jQuery UI is the perfect choice.


A pure-JavaScript CSS selector engine designed to be easily dropped in to a host library.
jQuery Mobile

jQuery Mobile

A unified, HTML5-based user interface system for all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.


A JavaScript library for internationalization and localization that leverages the official Unicode CLDR JSON data. The library works both for the browser and as a Node.js module.

Globalize on GitHub

jQuery Mouse Wheel Plugin

A jQuery plugin that adds cross-browser mouse wheel support with delta normalization.

jQuery Mouse Wheel on GitHub


Chassis is an attempt at creating open standards designed for CSS libraries, JavaScript UI libraries, and web developers in general. This project will define standards for markup and class names for common widgets and patterns, as well as an implementation of those standards.

Chassis on GitHub


PointerEvents Polyfill: a unified event system for the web platform

PEP on GitHub


Esprima is a high performance, standard-compliant ECMAScript parser written in ECMAScript (also popularly known as JavaScript).