1
/**
2
 * Definition for singly-linked list.
3
 * function ListNode(val, next) {
4
 *     this.val = (val===undefined ? 0 : val)
5
 *     this.next = (next===undefined ? null : next)
6
 * }
7
 */
8
/**
9
 * @param {ListNode} head
10
 * @param {number} val
11
 * @return {ListNode}
12
 */
13
var removeElements = function (head, val) {
14
  if (!head) return null;
15

16
  //if the val is on the beginning  delete it
17
  while (head && head.val === val) head = head.next;
18

19
  let current = head;
20
  let next = head.next;
21
  //travers the liste and delete any node has this val
22
  while (next) {
23
    if (next.val === val) {
24
      current.next = next.next;
25
    } else current = next;
26

27
    next = next.next;
28
  }
29

30
  return head;
31
};