abort-controller-x-rxjs/es/fromAsyncGenerator.js

Abortable helpers for RxJS

import { Observable } from 'rxjs';
/**
 * Turns abortable async generator to observable.
 */
export function fromAsyncGenerator(fn) {
    return new Observable(subscriber => {
        const abortController = new AbortController();
        async function iterate() {
            for await (const item of fn(abortController.signal)) {
                if (subscriber.closed) {
                    return;
                }
                subscriber.next(item);
            }
        }
        iterate().then(() => subscriber.complete(), err => subscriber.error(err));
        return () => {
            abortController.abort();
        };
    });
}
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