0.9.1-alpha.34

Patch Changes

• 4df7f3a: feat(badge): the v1 Badge — a count, a dot, and the corner it hangs off

  The twelfth entry of the core, and one node with no slots, per the plan: whatever is inside a badge is one line of two or three characters, and a slot would be a name for a Text the component can just as well insert itself (R3).

  It is not a small Chip. A chip holds a word and hugs it; a badge holds a count and is round unless the count is too wide to be. That is the minWidth equal to the height — one digit is a circle, two are a capsule — and it is why the label stays at 12pt through three of the four sizes: a count that grows with its badge stops being a count. The heights sit below the Chip's, 16/18/20/24 against 20/24/28/36.

  danger is the default, the only component in the library whose default is not the first name in its ladder. A badge is overwhelmingly the count of something that wants attention — unread, failed, overdue — and a red one is what <Badge>3</Badge> means.

  isDot is the bare circle, on its own diameter ladder (6, 8, 10, 12) rather than the height, because a 20pt circle beside a 16pt icon is not a dot. It reaches the recipe as a dot axis selected by the resolved size: an axis left unselected contributes nothing, which is exactly "this badge has a label" — where a { true, false } axis would have needed a branch with nothing to say and a size × isDot compound would have been sixteen entries for four measurements.

  placement makes the parent whatever the badge decorates: absolutely positioned in that corner, pulled out by half its own height on each axis so its centre lands on the corner it marks. The offset is derived from size, which is why it is a prop and not four style keys at the call site — and the keys are start and end (R13), so a trailing-corner badge mirrors in RTL. The insets are computed outside the style cache, and have to be: in flow the node is position: 'relative', where an inset is a nudge rather than a placement, so a cached top: -10 would shift every badge that has no placement at all.

  placementInsets is the one pure function here, and it has the one test file.