Fold DocumentAndElementEventHandlers into GlobalEventHandlers?

[foolip]

#699 introduced this Web IDL:

interface mixin DocumentAndElementEventHandlers {
  attribute EventHandler oncopy;
  attribute EventHandler oncut;
  attribute EventHandler onpaste;
};

Per https://w3c.github.io/clipboard-apis/#fire-a-clipboard-event these events fire on elements and bubble. https://software.hixie.ch/utilities/js/live-dom-viewer/?saved=10421 confirms the bubbling.

In other words, these events are much like "click" or "mousemove" events.

What's weird is that the the oncopy event handler properties are on only HTMLElement and Document, even though they bubble and will reach the window object.

Should we just move these event handler attributes to GlobalEventHandlers?

[zcorpan]

I think that would make sense. @hallvors do you know if there was any web compat rationale here? Or just what IE did or so?