How well does jQuery support backward compatibility?

Question

We have had issues with Mootools not being very backward compatible specifically in the area of drag and drop functionality. I was wondering if anyone has had any similar pr

Answer 1

jQuery is so serious about backwards compatibility that they produce a "backwards compatibility" plugin for each release: http://docs.jquery.com/Release:jQuery_1.2#jQuery_1.1_Compatibility_Plugin. It let people who don't need backwards compatibility save on page weight.