How can I use Javascript OO classes from VBScript, in an ASP-Classic or WSH environment?

Question

I know I can call top-level functions defined in JS from VBScript, and vice versa, like this:

<%@ language=\"Chakra\" %>



        

Answer 1

I don't know how to avoid the problem that VBScript cannot directly call a Javascript "constructor" function. The way I dealt with it was to simply define a shim: a top-level function in Javascript that invokes the constructor from within Javascript and returns the reference.

So:

<script language='javascript' runat='server'>(function() {  
  MyObj = function() {  
    this.foo = ...  
    ...  
  };  

  MyObj.prototype.method1 = function() { .. };  
  MyObj.prototype.method2 = function() { .. };  

  // define a shim that is accessible to vbscript
  Shim = {construct: function() { return new MyObj(); } };

}());  
</script>

<script language='vbscript' runat='server'>
  Dim foo
  Set foo = Shim.construct()
   ...
</script>