Implementation getElements pollyfills

getElementFunctionality.js

var startNode = document.body;
// multipleNode = false
function getElementByType(nodeList, type, value){
	for(var outerIdx = 0,outerIdxLen = nodeList.childNodes.length; outerIdx < outerIdxLen; outerIdx++ ){
		if(nodeList.childNodes[outerIdx].childNodes.length){
			getElementByType(nodeList.childNodes[outerIdx], type, value);
		}
		if(type == "tagname"){
			if(nodeList.childNodes[outerIdx].tagName && nodeList.childNodes[outerIdx].tagName.toLowerCase() == value.toLowerCase()){
				console.log(nodeList.childNodes[outerIdx]);
				console.log("Found tag Name");
				return nodeList.childNodes[outerIdx];
			}
		} else if(type == "id") {
			if(nodeList.childNodes[outerIdx].attributes){
				for(var innerIdx= 0, innerIdxLen = nodeList.childNodes[outerIdx].attributes.length; innerIdx < innerIdxLen; innerIdx ++){
				if(nodeList.childNodes[outerIdx].attributes[innerIdx].name == "id" && nodeList.childNodes[outerIdx].attributes[innerIdx].value == value){
					console.log(nodeList.childNodes[outerIdx]);
					console.log("id");
					return nodeList.childNodes[outerIdx];
					}
				}
			}
		} else if(type == "class"){
			if( nodeList.childNodes[outerIdx].classList && nodeList.childNodes[outerIdx].classList.contains(value)){
				console.log(nodeList.childNodes[outerIdx]);
				console.log("class");
				return nodeList.childNodes[outerIdx];
			}
		} else {
			console.log("not supported or not found");
			return;
		}
	}
}