browser compat: MouseEvent.toElement does not work in Firefox

[kevmoo]

While MouseEvent.current does.

I'm a strong proponent for addressing these cross-browser inconsistencies for popular browsers. If only to minimize dev headaches.

What version of the product are you using? On what operating system?

v10899, Mac 64-bit

[kevmoo]

See https://github.com/kevmoo/sweeper.dart/issues/10

[larsbak]

Set owner to @vsmenon.
Added Area-HTML label.

[larsbak]

Added Triaged label.

[vsmenon]

Removed the owner.
Added this to the Later milestone.

[blois]

Set owner to [email protected].

[kevmoo]

Removed Area-HTML label.
Added Area-Library, Library-Html labels.

[kasperl]

Removed this from the Later milestone.
Added Oldschool-Milestone-Later label.

[kasperl]

Removed Oldschool-Milestone-Later label.

[efortuna]

So ElementTo (and elementFrom) should hold the same data as relatedTarget, depending on whether you have a mouseover or mouseout event. relatedTarget is the W3C standard. I have marked the other two as deprecated for removal in the future, complete with comments explaining the situation.

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Set owner to @efortuna.
Added Fixed label.

[DartBot]

This comment was originally written by [email protected]

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I'm working with Chromium Version 37.0.2062.76 (289648)
relatedTarget return null... (Dart 1.6)