Javascript to pas
lazarus / 76-Pas2JS

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ramersonw · 2022-03-07 17:54

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][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i const
myPromisse = MyPromisseInit(); myPromisse.then((data) => {  const temp
= new data.SomeConstructor();}) 
My pascal code is as follows:
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i program
Project1; {$mode objfpc}{$modeswitch externalclass} uses  JS; type 
TData = class external name 'Object' (TJSObject)  public   
constructor SomeConstructor();  end;   function MyPromisseInit():
TJSPromise external name 'MyPromisseInit';  var  test:
TJSPromise;begin  test := MyPromisseInit();  test._then(function
(data: JSValue): JSValue  var    _data: TData absolute data;    res:
JSValue;  begin    res := _data.SomeConstructor();  end);end. 
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.

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MarkMLl · 2022-03-07 18:19

Quote from: ramersonw on March 07, 2022, 06:54:43 pmWhat 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

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marcov · 2022-03-07 21:10

Actually that is Delphi anonymous methods syntax.

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ramersonw · 2022-03-07 23:14

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

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MarkMLl · 2022-03-08 08:11

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

MarkMLl