Emit Error Notification

Emit Error Notification

• Observers have an error method that allows you to notify subscribers of an error
• Once the error method is called, the observable is finished and cannot emit new values, new errors, or emit a proper complete notification

new Observable((observer) => {
  try {
    const result = doSomething();
    observer.next(result);
    observer.complete();
  } catch (e) {
    observer.error(e);
  }
});