Import
import { rootTabIndex } from "@typed/ui/Composite";Signatures
export declare function rootTabIndex<CompositeState extends State, E, R>(state: RefSubject.RefSubject<CompositeState, E, R>): RefSubject.Computed<0 | -1, 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 { rootTabIndex } from "@typed/ui/Composite"; Extend the Composite.makeState
runnable setup. Inside the linked Effect
program read const value = yield* rootTabIndex(state); it is 0 while the root owns focus and
-1 after a roving-focus item becomes active.
Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.