[Webkit-unassigned] [Bug 202418] MouseEvent altKey property only changes on dragStart

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=202418

stefano.delliponti at epress.it changed:

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--- Comment #4 from stefano.delliponti at epress.it ---
I confirm this bug also in Safari 13.1 and macOS 10.15.4.

The problem has been present in Safari for at least three years, perhaps more.
Unfortunately I don't remember the first version where it appeared, but I  am sure it was not present at the beginning. 

Both Chrome and Firefox allow to discover the values of the modifier keys after starting dragging, keeping them updated if changed later.

I think that a workaround can be to query the dataTransfer.effectAllowed, which is changed dynamically when toggling ctrl, alt or meta.

Unfortunately I didn't find a way to query for the shiftKey status.

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