Can anybody explain to me why A is true and B is false? I would have expected B to be true as well.

function MyObject() {



};



MyObject.prototype.test = function () {

    console.log(A, this instanceof MyObject);

    (function () {

        console.log(B, this instanceof MyObject);

    }());

}



new MyObject().test();

update:
since ecmascript-6 you can use arrow functions which would make it easy to refer to MyObject like this:

function MyObject() {



};



MyObject.prototype.test = function () {

    console.log(A, this instanceof MyObject);

    (() => {//a change is here, which will have the effect of the next line resulting in true

        console.log(B, this instanceof MyObject);

    })(); //and here is a change

}



new MyObject().test();