关于javascript:数据结构JavaScript-LinkedList-实现

残缺可运行代码

class Node{  constructor(data) {    this.data = data    this.next = null  }}class LinkedList{  constructor() {    this.head = null    this.length = 0  }  append(data) {    const newNode = new Node(data)      if (this.length === 0) {      this.head = newNode    } else {      let current = this.head      while (current.next) {        current = current.next      }      current.next = newNode    }      this.length++  }}// const linkedList = new LinkedList()linkedList.append('AA')linkedList.append('BB')linkedList.append('CC')console.log(linkedList)