0.9.1-alpha.78

Patch Changes

• 413b20f: NumberStepper — Track · Decrement · Value · Increment

  P5.3e, net new. The increment pair the legacy Stepper is not — that one is a progress indicator, and this is a control.

  It is not a NumberField without its box. A field is typed into and this is not: no keyboard, no caret, no parse, no isInvalid, and no bounds to apply late, because a value that can only be pressed into existence is inside its range at every moment. What the two share is the arithmetic and nothing else — which is why parseNumber, formatNumber, clampNumber and stepNumber move to utils/number.ts in this change, at their second use and not by anticipation (§2 bis). Both components re-export the six from their own subpath, so a caller never reaches into utils/, which is private.

  The track is a slot, and it is written first. Out of flow and painted behind everything after it, so its place in the JSX is what puts it under the rest — Slider.Track's arrangement. The inset is the shape: the buttons are the control's full height and the pill is shorter, so the two circles stand proud of the ground between them. A pill as tall as its buttons is a segmented control, which says "pick one" rather than "more of it".

  The variant paints the buttons, because they are what a finger is aimed at. Four emphasis levels, no intents — a stepper reports nothing. secondary is the default and the one departure from the vocabulary table: it names surface rather than default, because a default button on a defaultSoft pill is two greys a shade apart and stops reading as raised at all.

  Each button owns its own press state. Two buttons on one control are two targets, so pressing the plus must not light the minus — which is why the recipe has no bgPressed and the press is the shared PressableFeedback treatment, the CloseButton's arrangement. Each goes flat and stops taking presses when the value has nowhere left to go, asked of the result rather than of the bound.

  A bin at the floor is children and a ternary, not a prop: the condition is a basket row's rule rather than a stepper's, and a caller's own onPress replaces the step rather than running beside it — removing the row is not also decrementing it.

  NumberStepper.Value takes a function child for a unit or a plural, and writes an em dash rather than a zero while nothing has been pressed.