I am very familiar with javascript and jquery in general, but I am looking for a good guide on how it works in rails 3.0. I understand that the javascript libraries have been rewritten in rails 3. (I never used rails 2.0)
It seems there are no railsguides for this.
I found this tutorial useful:
http://www.simonecarletti.com/blog/2010/06/unobtrusive-javascript-in-rails-3/