Incorrect example from the section on Prototype-based object-oriented programming, from @fogus's Functional JavaScript.

self-ref.js

var a = { 
    name: 'a',
    fun: function () { return this; } 
};

var bFunc = function () { return this; };
var b = { 
    name: 'b',
    fun: bFunc
};

console.log(a.fun());
// Book: => {name: 'a', fun: ...}
// Node: => {name: 'a', fun: ...}

console.log(b.fun());
// Book: => some global object, probably Window
// Node: => {name: 'b', fun: ...}