PWAs can't use foldable screens on the Duo yet, but two Chrome flags unlock the APIs

mitsuhiko · x · 2026-10-24

mitsuhiko tested what PWAs can do on the Duo foldable and found they can't leverage the form factor today. However, flipping the ViewportSegmentsAPIEnabled and DevicePostureAPIEnabled Chrome flags exposes viewport.segments and navigator.devicePosture, letting web apps detect folded vs. continuous screen postures — an early developer hook for foldable web adaptation.

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