I have a simple goal, I would like to increment a variable but I'm facing the closure problem. I've read why this s happening here How do JavaScript closures work?

But I can't find the solution to my problem :/

let's assume this part of code I took from the link.

function say667() {
// Local variable that ends up within closure
var num = 666;
var sayAlert = function() { alert(num); //incrementation
}
num++;
return sayAlert;
}

I would like to increment num within the function and to keep the changes to num.

How could I do that ?

Here is the JsFiddle where I have my problem, I can't figure out how to increment my totalSize and keep it.

http://jsfiddle.net/knLbv/2/

I don't want a local variable that ends up with closure.