This is fairly old. It goes with John Resig's book "Secrets of the JavaScript Ninja Released" which was released at the beginning of 2013 [1]. I remember seeing

This is fairly old. It goes with John Resig's book "Secrets of the JavaScript Ninja Released" which was released at the beginning of 2013 [1]. I remember seeing this site up well before that. He started the book in 2008. If you can work your way through this tutorial you'll gain a decent grasp of ES5 prototypes and functions. [1]: http://ejohn.org/blog/secrets-of-the-javascript-ninja-released/ http://ejohn.org/blog/secrets-of-the-javascript-ninja-releas...