Illumination on JavaScript Prototypes. Object Oriented Programming in JavaScript. Introduction The first version of this paper, written in 2003, had several shortcomings, not the least of which was that the techniques described were specific to Internet Explorer.
I've updated and improved on the original, to document the current state of the art, especially in light of the extensive interest in AJAX technology and the increasing adoption of the FireFox browser. All the examples presented here will follow the ECMA language standards and can be applied to Internet Explorer, FireFox, and ActionScript (in Macromedia Flash). Prototypal Inheritance. Douglas Crockford www.crockford.com Five years ago I wrote Classical Inheritance in JavaScript (Chinese Italian Japanese).
It showed that JavaScript is a class-free, prototypal language, and that it has sufficient expressive power to simulate a classical system. My programming style has evolved since then, as any good programmer's should. I have learned to fully embrace prototypalism, and have liberated myself from the confines of the classical model.