Not sure if this is a bug or intended, or if this is the right place for it (is the website on github?).
Anyways, this search:
https://www.yiiframework.com/search?q=clientOptions&version=1.1&type=api
Does not return a result linking to:
https://www.yiiframework.com/doc/api/1.1/CActiveForm#clientOptions-detail
Thanks.