@lifaon/rx-js-light/src/observable/built-in/to/with-notifications/async-iterable/to-async-iterable.mjs

Blazing fast Observables

import {createDeferredPromise} from "../../../../../misc/helpers/create-deferred-promise.mjs";
export async function* toAsyncIterable(subscribe) {
  const notifications = [];
  let notificationPromise = createDeferredPromise();
  const unsubscribe = subscribe(notification => {
    notifications.push(notification);
    notificationPromise.resolve();
  });
  try {
    while (true) {
      await notificationPromise.promise;
      notificationPromise = createDeferredPromise();
      while (notifications.length > 0) {
        const notification = notifications.shift();
        switch (notification.name) {
          case 'next':
            yield notification.value;
            break;
          case 'complete':
            return;
          case 'error':
            throw notification.value;
        }
      }
    }
  } finally {
    unsubscribe();
  }
}