0.9.1-alpha.91

Patch Changes

• 337f1cb: MorphButton — Collapsed · Expanded · Label · Title · Description · Icon

  P5.35c, net new. A button that changes shape: a pill at rest, a card once it is open.

  One box, two contents. The pressable is the shape that travels, and exactly one face is mounted at a time — so the box takes its size from whichever that is, and Reanimated's layout transition animates it between the two. Nothing is measured, which is the Accordion's rule applied to a control's own box: a card whose sentence arrives from the network grows with it, instead of being stuck at the size it had when it was measured.

  That is also why PressableFeedback gained a layout prop. The box that travels is the pressable itself; a transition on a wrapper animates the wrapper's frame while the pressable inside it is already at its final size, so the content spills out of the shape for the length of the spring. The root clips (overflow: 'hidden'), which turns those same frames into the shape revealing its content.

  One corner for both shapes, half the collapsed height. At that height it is exactly a pill; on the taller card it is a corner in proportion to the control's scale. Two radius keys would have needed a compound of size and radius to say what one derived value says once, and radius still overrides it.

  The measurements are on the faces, not on the box — the collapsed height and side inset on Collapsed, the card's four-sided frame on Expanded. Since one face is mounted at a time, that removes the size × isExpanded compound the component would otherwise need.

  Three sizes, not four: a card that opens out of a 32-point control has less room than the padding it would need. The Button's seven variants unchanged, its …Pressed token for the press rather than a Highlight overlay, and the description turned down by opacity rather than recoloured — the ground is a raw color as often as it is a token.

  No childrenToString (R3), and it is the one component that legitimately skips it: a bare string could belong to either face, and wrapping it into the collapsed one would build a button that morphs into an empty card. A missing face warns in development.

  isExpanded / defaultExpanded / onExpandedChange, controlled or not. useMorphButton() publishes toggle, so a close control inside the card costs no state. The faces fade from the second shape onwards — Reanimated runs an entering animation on the first mount as well, and without that every button on a screen would fade in as the screen arrived.

  Chart (Donut and Heatmap), ComposedChart, LinkButton and BottomSheetInput are dropped on the roadmap in the same change.