This is really directed at Steve I think...

I have been working on PRD forms that use the various onXXXX events and
I know the common ones work fine. (onload, onblur, etc).

But looking for more, I see W3 Schools defines this set:

Does UA support all these? I assume these are all browser based, so
should be browser supportablilty question, but are any of these
explictly excluded? Or should they pretty much all work'?