YahooUserInterfaceContrib
Yahoo User Interface Javascript library for use by Plugins, Contribs and applications
Summary of Contents
Contains an un-archived and ready for use copy of YUI 2.8.0 - see
http://developer.yahoo.com/yui
If you get the contrib using svn, it will contain all the examples and
documentation that is in the original archive.

Now also contains a full copy of YUI 3.0.0 - see
http://developer.yahoo.com/yui/3/
Note: YUI 3 is able to run on the same page as YUI 2 without any problems.
Documentation
YUI 2 Examples
YUI 3 Examples
More can be found in the root of the YUI3 install.
Installation Instructions
You do not need to install anything in the browser to use this extension. The following instructions are for the administrator who installs the extension on the server.
Open configure, and open the "Extensions" section. Use "Find More Extensions" to get a list of available extensions. Select "Install".
If you have any problems, or if the extension isn't available in
configure, then you can still install manually from the command-line. See
http://foswiki.org/Support/ManuallyInstallingExtensions for more help.