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extractFirst

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

Resolves with the first element emitted by the observable, then releases the observable. If no items are emitted the promise is rejected.

async function extractFirst<T>(o: Observable<T>): Promise<T>;
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extractFirst<T>(o: Observable<T>): Promise<T>
[src]

§Type Parameters

§Parameters

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o: Observable<T>
[src]

Observable to extract from.

§Return Type

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Promise<T>
[src]

Promise that resolves with a single item.