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Top layer research #4633
This is a continuation of explorations in #897 and #4535 about the discussions on exposing the "top layer" primitive to web developers, instead of just to
For this issue, let's focus on top-layer only, not on the focus/tab-trapping/inertness aspects of "blocking elements" that are explored in #897. We can continue the discussion about how those fit together in #897; I want to keep this more tightly scoped.
I suspect ultimately any solution here may end up in CSS, not HTML, but let's start some discussions focused on the research and problem space here.
My team at Chrome is interested in exploring this space, but we think there's a decent bit of research to do first. Some questions that come to mind in particular:
Some technologies that I can imagine being involved, but without research I have no evidence around, are:
Any help on this research, perhaps from people with a background in these technologies, would be appreciated.