Import
import { activeDescendant } from "@typed/ui/Composite";Signatures
export declare function activeDescendant<CompositeState extends State, E, R>(state: RefSubject.RefSubject<CompositeState, E, R>): RefSubject.Computed<string | undefined, E, R>;Why
The operation exposes Composite’s transition directly so callers can compose it in Effect programs and native event handlers.
Ownership and lifetime
Creating the Computed value acquires nothing eagerly. The Scope that subscribes to it owns observation of the source RefSubject.
Example
Import with import { activeDescendant } from "@typed/ui/Composite"; Extend the
Composite.makeState runnable setup. Inside
the linked Effect program read const id = yield* activeDescendant(state); it is the active id
only under virtual focus and otherwise undefined.
Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.