Kali is the only parts of jQuery I need for Chrome Apps.

kali.js

/*=============================================
KALI

@by cav_dan

$()
Kali: not jquery, but enough for me!
@args
	string selector -> a css like selector.
		returns single object OR array of objects
@methods
	.each(function(element object){});
==============================================*/
var $ = function(selector) {
	var selectorResults = document.querySelectorAll(selector);

	var kali = selectorResults.length > 1 ? selectorResults : selectorResults[0];

	//$.each()
	kali.each = function(whatToDo) {
		for (var el = this.length - 1; el >= 0; el--) {
			whatToDo(this[el]);
		}
	}

	//return selectorResults.length > 1 ? selectorResults : selectorResults[0];
	return kali;
};