Insert a Node at the head of a Linked List | JavaScript

insertNodeAtHead.js

//https://www.hackerrank.com/challenges/insert-a-node-at-the-head-of-a-linked-list/problem?h_r=next-challenge&h_v=zen

function insertNodeAtHead(head, data) {

    var newNode = new SinglyLinkedListNode(data);

    if(head==null){
        head = newNode;
        return head;
    }else{
        newNode.next = head
        head = newNode;
        return head;
    }


}

I have a different version :

addToHead(val) {
let newHeadNode = new Node(val);
newHeadNode.next = this.head;
this.head = newHeadNode;
}