Selector support for .on()

[madbonkey]

I'd like to start a discussion as to whether it could be feasible to add support for passing a selector to .on(), to facilitate event binding to dynamically created DOM elements.

[mrjjwright]

Yes, and the data object param. :) But if we don't get them because of some performance reason, no biggie for me. Just a request.

[mrjjwright]

Oh nevermind, this is trivial with a closure.