No, that call isn’t difficult. What is more difficult are examples given on things like Angular University, where there are pipe, subscribe, catchError, among others, in a single call chain. It’s not obvious to me at all what the order of execution is in this call chain for instance:
http$
.pipe(
map(res => res['payload']),
catchError(err => {
console.log('caught mapping error and rethrowing', err);
return throwError(err);
}),
finalize(() => console.log("first finalize() block executed")),
catchError(err => {
console.log('caught rethrown error, providing fallback value');
return of([]);
}),
finalize(() => console.log("second finalize() block executed"))
)
.subscribe(
res => console.log('HTTP response', res),
err => console.log('HTTP Error', err),
() => console.log('HTTP request completed.')
);
Once you see the output it begins to finally make sense but intuitive it is not
