Simplest Singly Linked List in JavaScript

linkedList.js

class LinkedList {
  head = null
  tail = null

  add (value) {
    const node = { value, next: null }
    if (!this.head) this.head = node
    if (this.tail) {
      this.tail.next = node
    }
    this.tail = node
  }

  remove () {
    if (this.head) {
      const value = this.head.value
      this.head = this.head.next
      if (!this.head) this.tail = null
      return value
    }
  }

  *values () {
    let current = this.head
    while (current) {
      yield current.value
      current = current.next
    }
  }
}

export const List = (...xs) => ({
  add: x => List(x, xs),
  remove: () => List(...xs.slice(1)),
  values: () => xs
})