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import { EmptyError } from './util/EmptyError'; import { SafeSubscriber } from './Subscriber'; export function firstValueFrom(source, config) { var hasConfig = typeof config === 'object'; return new Promise(function (resolve, reject) { var subscriber = new SafeSubscriber({ next: function (value) { resolve(value); subscriber.unsubscribe(); }, error: reject, complete: function () { if (hasConfig) { resolve(config.defaultValue); } else { reject(new EmptyError()); } }, }); source.subscribe(subscriber); }); } //# sourceMappingURL=firstValueFrom.js.map