Let's say you have

one.on('click .two', function (e, el) {
    // e.target = can be a descendant
    // el == the delegate root
    // this == xxx
}.bind(xxx))

There is no way you can access the actual element (.two). jQuery exposes it as e.currentTarget (I think), along with e.delegateTarget. Should we manipulate the event object too, maybe also normalize e.keyCode/which while we're at it?