Composition

Compose parts with Svelte snippets and optional render tag strings.

Base UI React leans on a render prop and useRender for element polymorphism. In Svelte:

Nest namespace parts (Popover.Trigger, Popover.Popup, …) as usual
Pass children as snippets; some parts forward state (children({ open }))
Where supported, set render="a" (or another tag) instead of cloning a React element
There is no useRender hook — wrap components or use snippets for richer composition