Reverse a Linked List created by dhavaljardosh1 - https://repl.it/Lvv8/0

Reverse a Linked List.js

class LinkedList{
  constructor(){
    this.head = null;
    this.length=0;
  }
  
  add(value){
    var node = new Node(value);
    if(this.head==null){
      this.head = node;
      this.length++;
    }
    else{
      var current = this.head;
      while(current.next){
        current = current.next;
      }
      current.next = node;
      this.length++;
    }
  }
  
  reverse(){
      var current= this.head,previous=null;
      while(current)
      {
        var next = current.next;
        current.next = previous;
        previous = current;
        current = next;
      }
      return previous;
  }
}

class Node{
  constructor(value){
    this.value = value;
    this.next = null;
  }
}

var ll = new LinkedList();

ll.add(3);
ll.add(2);
ll.add(7);
ll.add(9);