(Algorithms in Javascript) Leetcode 141. Linked List Cycle - Given a linked list, determine if it has a cycle in it.

141-linked-list-detect-cyle.js

/**
 * Definition for singly-linked list.
 * function ListNode(val) {
 *     this.val = val;
 *     this.next = null;
 * }
 */

/**
 * @param {ListNode} head
 * @return {boolean}
 */
const hasCycle = (head) => {
  let slow, fast;
  slow = fast = head;

  while(fast && fast.next){
    slow = slow.next;
    fast = fast.next.next;
    if(slow === fast){
      return true;
    }
  }
  return false;
};

The values of variable slow and variable fast are linked list. How can we use triple equal to compare them directly? Does slow === fast return false?