debounceTime config with { leading: true }

[EugeneHerasymchuk]

In current behaviour, throttleTime has configuration (default is { leading:true} at the moment) allowing to emit first event immediately and last event, throttling for N time the others.

Proposition:

would it be reasonable to add similar config for debounceTime. Theoretically, the default is already { trailing: true } - we receive the most recent event at the end of debounce time.
With { leading: true} the expected behaviour would be - we receive the first item after "the last item of the debounce subscription + debounce timeout".

This would allow to have marble diagram that I provided at the end. 'A' was the first value and it will emit only on 800ms

throttleTime:

debounceTime:

expected debounceTime with leading:true: