Import
import { RefStruct } from "@typed/fx";Access RefStruct.has through the imported RefStruct export. Its declaration below describes the member.
This public exposure is a re-export. Its import path is supported; declaration documentation is shared with the other public exposures below.
Signatures
export declare const has: {
<S extends object, const K extends keyof S>(key: K): <E, R>(ref: RefStruct<S, E, R>) => RefSubject.Computed<boolean, E, R>;
<S extends object, const K extends keyof S, E, R>(ref: RefStruct<S, E, R>, key: K): RefSubject.Computed<boolean, E, R>;
};Why
Makes has a live projection of the struct; consumers can sample it now or observe it without copying the source state.
Ownership and lifetime
The has view retains no independent state. An Effect read samples the source once; Fx observation follows later pushes and its observing Scope owns subscription cleanup.
Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.