In javascript, the this object in a callback is the object from where it is called. If you have a function that is not contained by an object (recognisable by the curly braces: {}), the this object will be window. You can check this by writing a console.log(this).

So, a helper function:

When you execute obj.bar() somewhere on your console their will be an output of the window object.

To allow for access of this.name in the anonymous function, change this:

More information on this can be found at the Mozilla developer network.

One last quick tip: a good JS developer always adds mdn to his Google query to get good documentation and not the commercial w3schools docs.

Cheers!