find the mode of all nodes in a linked list in typescript

index.ts
interface Node<T> {
  value: T;
  next: Node<T> | null;
}

function findMode<T>(head: Node<T>): T[] {
  const counts = new Map<T, number>();
  let maxCount = 0;
  let modeValues: T[] = [];

  // Iterate through each node in the linked list
  let node = head;
  while (node !== null) {
    const value = node.value;

    // Increment the count of the value
    const count = (counts.get(value) ?? 0) + 1;
    counts.set(value, count);

    // Update the max count and mode values
    if (count > maxCount) {
      maxCount = count;
      modeValues = [value];
    } else if (count === maxCount) {
      modeValues.push(value);
    }

    node = node.next;
  }

  return modeValues;
}
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