Singly Linked List ES6

slles6.js

class LinkedList {  
  this.head = null;

  push = val => {
    const node = {
       value: val,
       next: null
    }
    
    if(!this.head){
      this.head = node;      
    }
    else{
      current = this.head;
      while(current.next){
        current = current.next;
      }
      current.next = node;
    }
    
  }
}

const sll = new LinkedList();

//push node
sll.push(2);
sll.push(3);
sll.push(4);

//check values by traversing LinkedList 
sll.head; //Object {value: 2, next: Object}
sll.head.next; //Object {value: 3, next: Object}
sll.head.next.next; //Object {value: 4, next: null}