Loop over a linked list

linked-list-iterator.js

class LinkedList {
  head = null
  tail = null;

  insert(data) {
    const newNode = { data };
    if (!this.head) {
      this.head = newNode
    } else {
      this.tail.next = newNode;
    }
    this.tail = newNode;
  }

  *[Symbol.iterator]() {
    let node = this.head;
    while (node) {
      yield node.data;
      node = node.next;
    }
  }
}

const list = new LinkedList();
list.insert(10)
list.insert(20)
list.insert(30)

for (const item of list) {
  console.log(item)
}

// Logs 10, 20, 30