mouseevent not, but with delegation it also checks the parents of
event.target, hence the parents.
Mouseenter / mouseover can fire many times, however mousemove is still a
lost worse, because that one fires a lot.

On Tue, Feb 21, 2012 at 7:46 PM, verylastminute <[email protected]> wrote:

> Once again, please forgive my ignorance, but this section of code (
> https://github.com/mootools/mootools-core/blob/master/Source/Element/Element.Event.js#L148)
> would seem to indicate to me that the mouseenter event could 1) very well
> be a native element or 2) not require a parent lookup unless e.related is
> null or undefined. I guess it would depend on the markup involved, but I
> can't imagine this would bring the browser to its knees. There must be
> something obvious I am overlooking here...

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