YUI recommends YUI 3.
YUI 2 has been deprecated since 2011. This site acts as an archive for files and documentation.
In this example, the use of several key Dom Collection methods is explored. Given the markup in the source section, you can invoke any of the methods by clicking on them; the Source is updated, as is its in-browser appearance (Render). In the Outupt section, you can review the elements that are selected or affected (or, in a few cases, the JavaScript return
value) of the function you invoked.