How to use the domelementtype.CDATA function in domelementtype

DomHandler.prototype.oncdatastart = function(){
	var properties = {
		children: [{
			data: "",
			type: ElementType.Text
		}],
		type: ElementType.CDATA
	};

	var element = this._createDomElement(properties);

	this._addDomElement(element);
	this._tagStack.push(element);
};

function getOuterHTML(elem){
	switch(elem.type){
	case ElementType.Text:
		return elem.data;
	case ElementType.Comment:
		return "";
	case ElementType.Directive:
		return "<" + elem.data + ">";
	case ElementType.CDATA:
		return "";
	}

	var ret = "<" + elem.name;
	if("attribs" in elem){
		for(var attr in elem.attribs){
			if(elem.attribs.hasOwnProperty(attr)){
				ret += " " + attr;
				var value = elem.attribs[attr];
				if(value == null){
					if( !(attr in booleanAttribs) ){
						ret += "=\"\"";
					}
				} else {
					ret += "=\"" + value + "\"";
				}

function getText(elem){
	if(Array.isArray(elem)) return elem.map(getText).join("");
	if(isTag(elem) || elem.type === ElementType.CDATA) return getText(elem.children);
	if(elem.type === ElementType.Text) return elem.data;
	return "";
}

DomHandler.prototype.oncdatastart = function(){
	var element = {
		children: [{
			data: "",
			type: ElementType.Text
		}],
		type: ElementType.CDATA
	};

	this._addDomElement(element);
	this._tagStack.push(element);
};

DomHandler.prototype.oncdata = function(data){
	var lastTag = this._tagStack[this._tagStack.length - 1];

	if(lastTag && lastTag.type === ElementType.CDATA){
		lastTag.data += data;
		return;
	}

	var element = {
		data: data,
		type: ElementType.CDATA
	};

	this._addDomElement(element);
	this._tagStack.push(element);
};

DomUtils.getOuterHTML = function(elem){
	var type = elem.type;

	if(type === ElementType.Text) return elem.data;
	if(type === ElementType.Comment) return "";
	if(type === ElementType.Directive) return "<" + elem.data + ">";
	if(type === ElementType.CDATA) return "";

	var ret = "<" + elem.name;
	if("attribs" in elem){
		for(var attr in elem.attribs){
			if(elem.attribs.hasOwnProperty(attr)){
				ret += " " + attr;
				var value = elem.attribs[attr];
				if(!value){
					if( !(attr in booleanAttribs) ){
						ret += '=""';
					}
				} else {
					ret += '="' + value + '"';
				}
			}
		}

function getText(elem){
	if(Array.isArray(elem)) return elem.map(getText).join("");
	if(isTag(elem) || elem.type === ElementType.CDATA) return getText(elem.children);
	if(elem.type === ElementType.Text) return elem.data;
	return "";
}

DomHandler.prototype.oncdatastart = function(){
	var element = {
		children: [{
			data: "",
			type: ElementType.Text
		}],
		type: ElementType.CDATA
	};

	this._addDomElement(element);
	this._tagStack.push(element);
};

function getText(elem){
  if(Array.isArray(elem)) return elem.map(getText).join("");
  if(isTag(elem) || elem.type === ElementType.CDATA) return getText(elem.childNodes);
  if(elem.type === ElementType.Text) return elem.data;
  return "";
}