[DiThi]

The author should test their own examples

    var $ = document.querySelectorAll;

That doesn't work, it throws `TypeError: 'querySelectorAll' called on an object that does not implement interface Document.` The correct line is:

    var $ = document.querySelectorAll.bind(document);

I know this well because I use it in all my JS projects and plays nicely with Python style for loops (e.g. in CoffeeScript).

While I avoid jQuery I awknowledge the value of it, esp with old and mobile browsers. I avoid it precisely because my apps need modern HTML5/WebGL capable browsers anyway.