Alignment opportunity with foldable and multi-screen proposal

[michaelwasserman]

@bokand I wonder if there's an opportunity to align some active proposals with the Visual Viewport API, particularly the Window Segments Enumeration JS API (see also the proposed CSS MQ). +CC @zouhir & @dlibby- Perhaps folds or screen edges within the content area could be exposed as visual viewport information, or general insights from this work could inform that proposal.

Please consider joining our TPAC breakout session to discuss the foldables and multi-screen problem space and alignment opportunities between some active proposals. That will continue discussion from the Second Screen CG meeting; minutes. Thanks!