[w3c/uievents] Standardizing event.layerX and event.layerY (#193)

I am coming directly from [this WHATWG issue](https://github.com/whatwg/html/issues/3609), where @annevk rightly pointed me at this repository.

As mentioned in the original ticket, every Web developer that worked with canvas or any DOM element used as drawing surface, would like to use `layerX` and `layerY` as already implemented and expose in Chrome and WebKit browsers (probably Firefox too).

Even IE9, up to Edge, expose these properties but in a non de-facto standard way.

It would be awesome to have these two properties that represent same top-left X,Y coordinates system the canvas 2d context, as well as any CSS position, use.

Developers have been using ugly (and slow) workarounds for so many years we hope it's reasonable to ask standardizing these.

Thanks for consideration.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/uievents/issues/193