Is it possible to modify a function itself when its property function is called?

Question

Basically I want to do this:

someFunction() // do something

someFunction.somePropertyFunction()

someFunction()  // Now someFunction is modified; it should now          


        

Answer 1

Sure it's possible. It's not recommended, but it's possible. For example:

function a() {
    alert("a");
}

function b() {
    alert("b");
}

function c() {
    return c.f.apply(this, arguments);
}

c.f = a;

c.toggle = function () {
    c.f = c.f === a ? b : a;
};

Now let's test it:

c();        // alerts "a"
c.toggle();
c();        // alerts "b"

See the demo: http://jsfiddle.net/LwKM3/