PositionValue
PositionValue =
number|`${number}%`
Defined in: ui/src/types.ts:110
Offset for a position: "absolute" edge. A raw number is pixels; a
"<n>%" string resolves against the containing block (the nearest
position: "relative" ancestor’s content box) — the same reference box
CSS uses. So top: "100%" means “the containing block’s full height down
from its top edge”, i.e. flush against its bottom. This is what lets
edge-relative overlays (tooltips, dropdowns) anchor to a shrink-wrapped
trigger without measuring it.