POST-request is not processed if no Subscriber is registered on returned Observable

[Schmoho]

I don't know whether this is intended or not, but I think it should at least be documented.

[mithunshanbhag]

Isn't this by design?

https://angular.io/guide/http#always-subscribe

An HttpClient method does not begin its HTTP request until you call subscribe() on the observable returned by that method. This is true for all HttpClient methods.