API: forms
Function: bounds()
lifecycle-kit
lifecycle-kit / forms / bounds
Function: bounds()
Defined in: forms/path.ts:426
The bounding box of a path, or null when it has no shapes.
Exact for every member of the segment vocabulary, which is the reason it is here rather than in a renderer. Tests assert extents — "a taper narrows", "a radiate is symmetric about its hub" — and an approximate bound computed from control points would make those assertions fuzzy in precisely the way vectors were chosen to avoid.
Control points of a Bézier are NOT on the curve, so including them directly would overstate the box. The curve is solved instead: the extremum of a Bézier lies at an endpoint or where its derivative crosses zero, so the derivative roots within (0, 1) are evaluated and included.
