Unfortunately it's not as simple as it is with events. With events you have the advantage of binding to a single point (e.g. the document node) and using the native event bubbling that exists in all browsers to capture any event that occurs on the page. This way we can detect a click on a new DOM element that we haven't seen before.

We don't have that luxury with CSS. There's no universal way for all browsers to let JavaScript know when a new element has been added to the page - or that it's been moved. There's the W3C DOM mutation events but they aren't implemented everywhere.

More info: http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-e...