find the last node in a linked list in javascript

To find the last node in a linked list in javascript, we can traverse the list starting from the head node until we reach the last node. Here's a code snippet that demonstrates this approach:

index.tsx
function getLastNode(head) {
  let currentNode = head;
  while (currentNode.next !== null) {
    currentNode = currentNode.next;
  }
  return currentNode;
}
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In the above code, we start by initializing currentNode to the head of the linked list. We then use a while loop to traverse the list until we reach the last node, which is identified by its next property being null. Finally, we return the last node.

Note that this implementation assumes that the linked list is non-empty - if the list could be empty, you should add a check for that before entering the loop.