JavaScript - this of this

Question

String.prototype.foo = {};
String.prototype.foo.bar = function() {
    //How can you reference the \"grandparent\" string?
    console.log(this.parent.parent); //obvious         


        

Answer 1

There is no way for an object to know what object it's a property of. The same object (in your case a function) could be attached to multiple objects. Here's an example:

var myObj = {};
var objA = {prop: myObj};
var objB = {nother: myObj}

If given a reference to myObj, how could you possibly know which parent object you're referring to? In one case, it's nothing, another case, it's objA, the last case, it's a 'child' object of objB. If you explain why you'd like this behavior, we can help you solve the problem at hand. But the answer to the question is that you CAN'T do it.