igorw

    var obj = { f: function () { return this; } };
    
    // returns the object
    obj.f()

    // returns window
    var f = obj.f;
    f();

    var obj = (function () {
        var that = {};

        that.doSomethingLater = function () {
            setTimeout(function () { console.log(that); }, 1000);
        };

        return that;
    })();

    obj.doSomethingLater();