[removed] why “this” inside the private function refers to the global scope?

Question

Consider the following code:

function A() {}    

A.prototype.go = function() {
    console.log(this); //A { go=function()}

    var f = function() {
                


        

Answer 1

The scope of all functions is window.

To circumvent that, you can do this:

function A() {}    

A.prototype.go = function() {
    var self = this;
    console.log(self); //A { go=function()}
    var f = function() {
         console.log(self);  //A { go=function()}           
    };

    f();
}