0.9.1-alpha.43

Patch Changes

• ef43606: BottomSheet — Trigger · Overlay · Content · Handle · Title · Description · Close

  Built on this library's own peers rather than on @gorhom/bottom-sheet, which is what the reference implementation wraps. A sheet that slides, springs and dismisses is a pan gesture and a shared value; taking a dependency for that would put a second animation library in every app that installs one component. What it costs is their snap points and their scroll integration — both worth having, and both worth their own change rather than a dependency.

  It measures its own height, then slides that far. A sheet is as tall as what is in it and nothing else on the screen knows that number, so the first layout is what tells the animation how far "down" is. Until it has one the sheet waits off-screen at a pessimistic distance rather than flashing at its resting place for a frame.

  Far enough or fast enough. Past dismissThreshold of its own height it closes; so does a flick over 900 points a second, whatever the distance. Without the second, a quick flick from the top of a tall sheet is refused however clearly it meant to throw the thing away. The drag is downward only: a sheet dragged up is already against the top of its own content, and letting it stretch there is a rubber-band nobody asked for.

  Two separate refusals. isSwipeable={false} on the content and isDismissable={false} on the overlay, because a sheet that can be tapped away but not dragged is a real design and so is the reverse.

  BottomSheet.Handle is written by the caller. It is the only thing telling a reader the sheet can be dragged — the gesture has no other affordance — so a sheet with the drag turned off should not be advertising it.

  radius moves the top corners only, which is why this component does not use radiusAxis: that helper writes borderRadius, and a sheet's lower corners are off the screen. Rounding them would put two arcs against a straight edge nobody can see.

  It completes what the Dialog started: Select.Content and Menu.Content are written around a presentation prop that needed both.