[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

--- Comment #1 from Jay C <jay at conton.io> ---
I wrote out a long bug report when submitting this, but not seeing that text here so I will rewrite it (ugh).

Problem:
The MouseEvent's "altKey" property doesn't change when pressing/releasing the option key.

Example:

I have a set of list items that I can drag and drop, and another set of list items that can handle a drop.

in the drag start handler for the items I can drag, I have set the dataTransfer effectAllowed value to "copyMove".

in the drop Handler, dragEnter handler, and dragOver handler on the droppable list items, I am logging out the altKey property. 

If I start the drag operation with the option key held down, the altKey property will always be true, no matter if I release the key or not.

If I start the drag operation without the option key held down, the altKey property will always be false, no matter what I do.

I have attached a screen recording showing Firefox vs Safari

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