single

import { single } from "https://raw.githubusercontent.com/surma/observables-with-streams/28c55be6d855780c677fd1f4ba975f4d3144891d/src/index.ts";

Resolves with the only element emitted by the observable. If zero or more than one items are emitted, the promise is rejected.

async function single<T>(o: Observable<T>): Promise<T>;

single<T>(o: Observable<T>): Promise<T>

Observable to extract from.

Promise<T>

Promise that resolves with a single item.