Prinzhorn/jquery-inlog. jQuery-inlog. jQuery-inlog allows you to easily debug your jQuery code.
See exactly what you pass to functions, what they return and in which context (this-value) they were executed. No more alert($obj.length) to see if your selector worked. No more pain when chaining many calls and figuring out which one fails NEW: See nested or recursive calls in the right order. Getting Started with Speed Tracer - Google Web Toolkit.