Linked list JS

linkedlist.js

function Node(data){
	this.data = data;
  this.next = null;
}


function LinkedList(){
	this.length=0;
  this.head = null;
}


LinkedList.prototype.add = function(value){
var node =  new Node(value);
if(this.head == null){
this.head = node;
this.length++;
}
else{
current = this.head;
while(current.next!=null){
current = current.next;

}
current.next = node;
this.length++;
}

}

LinkedList.prototype.removeAtNthPosition = function(position){

var current = this.head;
var currentPrev = null;
var nodeToDelete = this.head;
if(position == 1){
this.head = null;
}
else if(this.length < position){
this.head = current.next;
}
else{
var index = 0;
while(nodeToDelete.next!=null ){
  if(index < position){
    nodeToDelete = nodeToDelete.next;
   index++;
    

  }
}
  while(nodeToDelete!=null){
    currentPrev = current;
    current = current.next
    nodeToDelete = nodeToDelete.next;
  }
  currentPrev.next = current.next;
  this.length --;
}

}

LinkedList.prototype.display= function(){
  for(var i=0;i<this.length;i++){
    console.log(this.head.data+"->")
    this.head = this.head.next;
  }
}
var  ll = new LinkedList();
// add
ll.add(235);
ll.add(245);
ll.add(123);
ll.add(223);
ll.removeAtNthPosition(2);
ll.display();