[Pas2js] First impressions and Queries

[C Western]

I would like to echo what others have said, that pas2js gives a very 
workable implementation of Pascal in a web browser, and I have managed 
to use it surprisingly easily on some non-trivial code. A couple of 
queries/rough edges, (which I was able to work around):

1. The .map files produced always seem to be corrupt - they always begin:

)]}
{"version":3,"file":"ar.js","sources":["/home....

which doesn't look right. Am I doing something wrong? Fortunately the 
code produced is sufficiently close to the original that debugging with 
the firefox developer tools was straightforward.

2. An inline directive on a procedure gives an error - can't this simply 
be ignored?

3. Adding a package as a requirement is slightly odd in lazarus - on 
compiling the program, it first compiles the changed package file in 
fpc, then with pas2js. This is harmless, but it can be confusing to sort 
out error messages.

4. Char(65) fails (but Chr(65) is OK).

5. This may be an implementation choice, but SetLength on arrays is not 
forcing a copy where fpc normally would; for example:

var
   a, b: array of Integer;
begin
   SetLength(a,1);
   a[0] := 6;
   b := a;
   WriteLn(a[0], ' ', b[0]);
   SetLength(a,1);
   WriteLn(a[0], ' ', b[0]);
   a[0] := 2;
   WriteLn(a[0], ' ', b[0]);

gives with FPC:
6 6
6 6
2 6
but with pas2js:
6 6
6 6
2 2

These are minor gripes - I must say again that I am impressed how 
straightforward it was.

Colin