The list handle for Svelte — the twin of React's useList, and field's
sibling (subscribe, not build — the def builders are the -Of family). current
subscribes to the MEMBERSHIP entry only: add/remove/reorder wake it,
an element edit never does (the render-isolation contract). Null while
the list is inactive in the current branch. Element fields read via
field(store, elementPath(key, id)('engine')).
The list handle for Svelte — the twin of React's useList, and
field's sibling (subscribe, not build — the def builders are the -Of family).currentsubscribes to the MEMBERSHIP entry only: add/remove/reorder wake it, an element edit never does (the render-isolation contract). Null while the list is inactive in the current branch. Element fields read viafield(store, elementPath(key, id)('engine')).