Question

I’m using TopUp to make a simple slideshow. Unfortunately they don’t expose the image index.

Is there a way I can access the local variable “index” without having to modify the original script?

TopUp = (function() {
 var index = null;
    ...
}

Answer 1

Without modifying the original script, you can’t.

But if you just want to be able to read the value of index, the modification could be really simple, by adding a little function in the objet returned :

getIndex : function() {
  return index;
},