Yahoo User Interface Library
2008-2011 William duff. All rights reserved.
YUI 2 Developer Tools:

  • Logger Control
  • Profiler (client-side, cross-browser profiling)
  • ProfilerViewer Control
  • YUI Test Utility

YUI is a JavaScript and CSS library with more than 30 unique components including low-level DOM utiltiies and high-level user-interface widgets. Currently at version 2.8.0r4, YUI 2 is robust, proven, time-tested, and extensively documented. Choose from the download options below or configure your implementation using the Dependency Configurator
YUI Library

The YUI Library is a set of utilities and controls, written with JavaScript and CSS, for building richly interactive web applications using techniques such as DOM scripting, DHTML and AJAX. YUI is available under a BSD license and is free for all uses.

YUI is proven, scalable, fast, and robust. Built by frontend engineers at Yahoo! and contributors from around the world, it's an industrial-strength JavaScript library for professionals who love JavaScript.
Reliable Service

Service Pages

Yahoo Mail File Storage

Benchmark Pages

Apache Benchmark