How to send a POST request via Angular HttpClient wihout cancelling on unsubscribe?

Question

I need to send a POST request and I do not care if it succeeds or fails => "fire and forget". Immediately after sending the request a hard redirect is initiated. This causes the Angular HttpClient POST request to be cancelled.

// sending POST request
this.httpClient.post('someUrl', {}).subscribe();
// hard redirect causes cancelation of POST request
window.location.replace('someOtherUrl');

Is there any way to send the request without it being cancelled?

Answer 1

Use finalize

this.httpClient.post('someUrl', {})
  .pipe(finalize(() => window.location.replace('someOtherUrl'))
  .subscribe();

or add

this.httpClient.post('someUrl', {})
  .subscribe()
  .add(() => window.location.replace('someOtherUrl'));

Finalize will emit for next or error, add should be called on unsubscribe (HttpClient automatically completes).