Pop on LL for Stack

Pop.js

  //Pop the item from the stack
   pop = () => {
    let current = this.head;
    
    //If there is item then remove it 
    //and make the next element as the first
    if(current){
      let el = current.element;
      current = current.next;
      this.head = current;
      this.length--;
      return el;
    }
    
    return null;   
  }