[removed] Extend a Function

Question

The main reason why I want it is that I want to extend my initialize function.

Something like this:

// main.js

window.onload = init();
function init         


        

Answer 1

The other methods are great but they don't preserve any prototype functions attached to init. To get around that you can do the following (inspired by the post from Nick Craver).

(function () {
    var old_prototype = init.prototype;
    var old_init = init;
    init = function () {
        old_init.apply(this, arguments);
        // Do something extra
    };
    init.prototype = old_prototype;
}) ();