[webstrand]

I have an ImageViewer component, which is sometimes displayed in a modal dialog for confirming operations on that image, like delete, move, deduplicate, etc.

The ImageViewer has a context menu popover that needs to appear above the modal that contains it. Using the Popover API lets me be sure that there'll be no z-fighting, the popover won't be clipped by its parent element, and that the popover will dismiss correctly when the user wants it gone. It's pretty great, and I don't think it harms accessibility any more than _having_ a context menu in the first place harms it. And the UX is fine.

(Aside from some hellish work making it so that `oncontextmenu` can actually open a popover. According to the spec, right button mouseup triggers light dismiss, closing the context menu as soon as it opens)