You have to pass a promise to await
. Convert the observable’s next event to a promise and await that.
if (condition) {
await observable.first().toPromise();
}
Edit note: This answer originally used .take(1) but was changed to use .first() which avoids the issue of the Promise never resolving if the stream ends before a value comes through.
As of RxJS v8, toPromise
will be removed. Instead, the above can be replaced with await firstValueFrom(observable)