I followed Hartl's Rails tutorial where he does Ajax using RJS and sending javascript in the response to be executed on the client side to edit the DOM.
But what do you do if you want just JSON sent in the response and not send javascript. This also means the javascript to manipulate the DOM should already be in the html file on the client. Is there a tutorial as good as Hartl's book on how to do this in Rails. Presumably it would use Jquery and some other stuff maybe that I've not heard of to make the code not be a million lines?