Javascript to pas

[ramersonw]

Hi,

Hi, I'm trying to use a lib in my pas2js project, but I'm not able to make it work.

I'm triyng to use the snippet below:

Code: Javascript  [Select][+][-]

1. const myPromisse = MyPromisseInit();
2.  
3. myPromisse.then((data) => {
4.   const temp = new data.SomeConstructor();
5. })
6.  

My pascal code is as follows:

Code: Pascal  [Select][+][-]

1. program Project1;
2.  
3. {$mode objfpc}
4. {$modeswitch externalclass}
5.  
6. uses
7.   JS;
8.  
9. type
10.   TData = class external name 'Object' (TJSObject)
11.   public
12.     constructor SomeConstructor();
13.   end;
14.  
15.   function MyPromisseInit(): TJSPromise external name 'MyPromisseInit';
16.  
17.  
18. var
19.   test: TJSPromise;
20. begin
21.   test := MyPromisseInit();
22.   test._then(function (data: JSValue): JSValue
23.   var
24.     _data: TData absolute data;
25.     res: JSValue;
26.   begin
27.     res := _data.SomeConstructor();
28.   end);
29. end.
30.  

But it did not work.
Compile says project1.lpr(27,18) Error: External class instance cannot access static constructor SomeConstructor


What I have to change to make it work?

Edited the pascal snippet with complete code.

[MarkMLl]

What I have to change to make it work?

Everything.

You can't nest blocks like that, and in particular you have to declare variables (var declaration) outside the begin/end block that will reference them.

Don't trust the compiler error messages until you've got the layout right.

MarkMLl

[marcov]

Actually that is Delphi anonymous methods syntax.

[ramersonw]

Yes. It's an anonymous function and It Works with pas2js transpiler.

[MarkMLl]

In that case I'd like to apologise for being misleading.

MarkMLl