[whatwg] Adding mouseenter and mouseleave events
Gareth Hay
gazhay at gmail.com
Wed Mar 14 18:02:46 PDT 2007
Can't you just return false from an event handler to prevent further
bubbling?
On 15 Mar 2007, at 00:30, Magnus Kristiansen wrote:
> Mouseover/out events will trigger when elements contained inside
> the EventTarget are hovered, and then bubble up. This is contrary
> to the most obvious interpretation, as you are still inside (over)
> the targeted element. IE supports two events, mouseenter[1] and
> mouseleave[2], which solve this problem by not bubbling.
>
> It is possible to work around the problem by using target/
> relatedTarget and walking up the DOM tree. However, this requires
> extra code for every event handler. Besides, these events were
> often not meant to be generated in the first place, by the intent
> of the author.
>
> I have no statistics for how often mouseover/out are used with and
> without intent of bubbling, but the anecdotal evidence from my own
> experience has never found me wanting it.
>
> I suggest these two events be added to the web applications spec.
>
> [1] http://msdn.microsoft.com/workshop/author/dhtml/reference/
> events/onmouseenter.asp
> [2] http://msdn.microsoft.com/workshop/author/dhtml/reference/
> events/onmouseleave.asp
>
> --
> Magnus Kristiansen
> "Don't worry; the Universe IS out to get you."
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