Small javascript library that does most of the things I need from jQuery

shortcutLib.js

var shortcutLib;

if(typeof q !== 'undefined'){
	shortcutLib.previousQ = q;
}

(function(q){
	
	var rootElement = document;
	
	var q = function(arg){
		
		this.element == null;
		this.elements == null;
		
		if(arg instanceof q){
			arg.utils = q.utils;
			return arg;
		}
		
		this.elements = arg;
		
		return this;
	}
	
	//Selectors
	
	q.fn = q.prototype;
	
	q.sa = function(selector){
		return new q(rootElement.querySelectorAll(selector))
	}

	q.c = function(classNames){
		return new q(rootElement.getElementsByClassName(classNames))
	}

	q.id = function(id){
		return new q([rootElement.getElementById(id)])
	}

	q.tag = function(tagName){
		return new q(rootElement.getElementsByTagName(tagName))
	}

	q.fn.before = function(content){
		var q = this;
		
		if(typeof(content) == "string"){
			content = q.utils.HTMLStringToFragment(content);
		}
		q.each(function(){
			rootElement.body.insertBefore(content, this.element);
		});
		
		return this;
	}

	q.fn.after = function(content){
		var q = this;
		
		if(typeof(content) == "string"){
			content = q.utils.html(content);
		}
		q.each(function(){
			this.element.
				parentNode.
					insertBefore( 	
									content,	
									this.element.nextSibling 
								);
		});
		
		return this;
	}

	q.fn.append = function(content){
		var q = this;
		
		if(typeof(content) == "string"){
			content = q.utils.html(content);
		}
		q.each(function(){
			this.element.appendChild(content);
		});
		return this;
	}

	q.fn.prepend = function(content){
		var q = this;
		
		if(typeof(content) == "string"){
			content = q.utils.html(content);
		}
		
		q.each(function(){
			if(this.element.firstChild){
				this.element.insertBefore(content,this.element.firstChild);
			}
			else{
				this.element.appendChild(content);
			}
		});
		return this;
	}

	q.fn.remove = function(){
		var q = this;
		
		q.each(function(){
			this.element.parentNode.removeChild(this.element)
		})
		
		return this
	}
	
	//Element Manipulation
	
	q.fn.text = function(newText){
		var q = this;
		
		if(typeof newText === 'undefined'){
			var text = "";
			q.each(function(){
				text += this.element.textContent;
			})
			
			return text
		}
		else{
			q.each(function(){
				console.log(this.element);
				this.element.textContent = newText;
			})
		}
		
		return this;
	}
	
	//classes
	
	q.fn.addClass = function(className){
		var q = this;
		
		q.each(function(){
			this.element.className.replace(className,"");
			this.element.className += " "+className;
		});
		return this;
	}
	
	q.fn.removeClass = function(className){
		var q = this;
		
		q.each(function(){
			this.element.className = this.element.className.replace(className,"");
		});
		return this;
	}
	
	q.fn.toggleClass = function(className){
		var q = this;
		
		q.each(function(){
			if(this.element.className.indexOf(className) != -1){
				this.element.className.replace(className,"");
			}
			else{
				this.element.className.replace(className,"");
				this.element.className += " "+className;
			}
		});
		return this;
	}
	
	//Events
	
	q.fn.on = function(eventType,callback){
		var q = this;
		q.each(function(){
			this.element.addEventListener(eventType,callback);
		});
		return this;
	}

	//Styling
	
	q.fn.css = function(rules){
		var q = this;

		for(rule in rules){
			q.each(function(){
				this.element.style[rule] = rules[rule];
			})			
		}

		return this;
	}
	
	q.fn.hide = function(){
		this.each(function(){
			this.attr("data-display",this.element.style.display)
			this.element.style.display = "none";
		})
		return this
	}
	
	q.fn.show = function(){
		this.each(function(){
			this.element.style.display = this.attr("data-display")
		})
		return this;
	}
	
	//Data
	
	q.fn.attr = function(attribute,value){
		if (typeof value === 'undefined'){
			return this.elements[0].getAttribute(attribute);
		}
		else{
			this.elements[0].setAttribute(attribute,value);
			return this;
		}
	}
	
	//Access dom
	
	q.fn.item = function(index){
		return this.elements[index];
	}
	
	q.fn.each = function(callback){
		var q = this;
		
		for(var i = 0; i < this.elements.length; i++ ){
			this.element = this.elements[i];
			if(callback.call(this) == -1){
				return this
			}
		}
		return this
	}
	
	//Utilities
	
	q.utils = function(){};
	
	q.utils.html = function (htmlString){	
		var frag = rootElement.createDocumentFragment(),
			temp = rootElement.createElement('div');
		
		temp.innerHTML = htmlString;
		
		while (temp.firstChild) {
			frag.appendChild(temp.firstChild);
		}
		
		return frag;
	}
	
	q.utils.merge = function (object,defaults){
		
		if(typeof object === 'undefined'){
			return defaults;
		}
		
		for(var setting in defaults){
			if(typeof object[setting] === 'undefined'){
				object[setting] = defaults[setting];
			}
		}
		return object;
	}
	
	q.utils.nodeList = function(domElement){
		console.log(domElement);
		var fragment = rootElement.createDocumentFragment();
		fragment.appendChild(domElement);
		return fragment.childNodes;
	}
	
	q.utils.l = function(message){
		console.log(message);
	}
	
	q.utils.addStyle = function (style){
		if(typeof(style) == "string"){
			var css = rootElement.createElement("style");
			css.type = "text/css";
			css.innerHTML = style;
			q.tag("head").append(css);
		}
	}
	
	shortcutLib = q;
	
})(shortcutLib);

q = shortcutLib;