Hi all,

In JS the "new" operator is often used to create objects, where a function works similar to a Pascal class.

pas2js trunk now supports descending a Pascal class from such a JS Function.

https://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/utils/pas2js/docs/translation.html?view=co#externalclassancestor

Instances are JS Functions and the instanceof operator works as expected, allowing to pass the Pascal object to JS frameworks.

Mattias

[...] pas2js trunk now supports descending a Pascal class from such a JS Function.

Note that pas2js checks for an ancestor class with external name 'Function'. You don't need to use TJSFunction from unit JS. If you don't like to drag in all the TJSFunction/TJSObject members, you can use:

type
  TJSMinimalFunction = class external name 'Function'
  end;
  TFrameworkFuncClass = class external name
  'FWFunc'(TJSMinimalFunction)
    constructor New;
  end;
  TMyDescendant = class(TFrameworkFuncClass)
  end;

Analog: If you want to descend from a JS Object, which is not a Function you can do:

type
  TFrameworkObject = class external name 'FWObject'
  end;
  TMyDescendant = class(TFrameworkObject)
  end;

Mattias