[Pas2js] Possible feature? keep the original JS overload behavior

[Michael Van Canneyt]

On Fri, 21 Dec 2018, Mattias Gaertner via Pas2js wrote:

> On Fri, 21 Dec 2018 20:17:04 +0100 (CET)
> Michael Van Canneyt <michael at freepascal.org> wrote:
>
>> On Fri, 21 Dec 2018, silvioprog wrote:
>> 
>> > On Fri, Dec 21, 2018 at 3:08 PM Michael Van Canneyt
>> > <michael at freepascal.org> wrote:
>> > 
>> >> I think that should be possible, but only for external functions.
>> >>
>> >> Michael. 
>> >
>> >
>> > sorry, but it sounds very strange for me: 
>> 
>> I meant, what you propose (omitting optional args) should be possible
>> for external functions.
>
> Why forbid it for Pascal functions?

Because the actual call then matches the declaration, it just has some values
pre-filled in.  Defaults are just a way to save typing, after all.

What happens under the hood should IMO always be the same:
When a function expects 5 arguments, it should get 5.

The purpose of pas2js is to allow pascal to run in the browser. 
The purpose is not to make pascal behave like Javascript. 
I want to bend Javascript, not bend pascal. So if we really must bend
pascal to accomodate interaction with external JS code, 
I prefer it limited to that use case alone :-)

Michael.