Question

Noob question here. Please see code below.
Where can I read more on this? I mean, this_variable gets 100. All subsequently defined functions seem to be able to access this variable and get it’s value, but I wonder how deep does this work? I’m working on a Chrome extension and the damn thing only works with callbacks; I need to be able to access stuff within a pretty deeply nested callback and I need to be sure that what I write is reliable and will remain consistent.

(function(){

    this_variable = 100;

    (function(){
        (function(){
            (function(){
                (function(){
                    (function(){

                        tadaaa = this_variable;
                        console.log(tadaaa); // sais 100                

                    }());
                }());
            }());
        }());
    }());
}());

Answer 1

As deeply as you want. The name for the concept is closures and it is the most important concept when programming advanced javascript.