AFAIK, Yahoo! itself does not, though there is one is available.
Yazaar is an independent site not affiliated with Yahoo!
Ricardo Takemura wrote:
> Yahoo! User Interface Library GroupHi,
> I would like to know if Yahoo! has a js library to validate elements
> forms. Example:
> - Element text not empty, elements masks, e-mail validation, etc.
> Or do I have to use the element component from YUI and do it by myself?