class DownJacket {
  production(){
    console.log('生產(chǎn)羽絨服')
  }
}
class Underwear{
  production(){
    console.log('生產(chǎn)內(nèi)衣')
  }
}
class TShirt{
  production(){
    console.log('生產(chǎn)t恤')
  }
}
// 工廠類
class clothingFactory {
  constructor(){
    this.downJacket = DownJacket
    this.underwear = Underwear
    this.t_shirt = TShirt
  }
  getFactory(clothingType){
    const _production = new this[clothingType]
    return _production.production()
  }
}
const clothing = new clothingFactory()
clothing.getFactory('t_shirt')// 生產(chǎn)t恤

/* 抽象類
js中abstract是個(gè)保留字，實(shí)現(xiàn)抽象類只能通過new.target進(jìn)行驗(yàn)證，
防止抽象類被直接實(shí)例，另外如果子類沒有覆蓋指定方法，則拋出錯(cuò)誤
*/
class ProductionFlow {
  constructor(){
    if(new.target === ProductionFlow){
      throw new Error('抽象類不能被實(shí)例')
    }
  }
  production(){
    throw new Error('production要被重寫')
  }
  materials(){
    throw new Error('materials要被重寫')
  }
}
class DownJacket extends ProductionFlow{
  production(){
    console.log(`材料:${this.materials()},生產(chǎn)羽絨服`)
  }
  materials(){
    return '鴨毛'
  }
}
class Underwear extends ProductionFlow{
  production(){
    console.log(`材料:${this.materials()},生產(chǎn)內(nèi)衣`)
  }
  materials(){
    return '絲光棉'
  }
}
class TShirt extends ProductionFlow{
  production(){
    console.log(`材料:${this.materials()},生產(chǎn)t恤`)
  }
  materials(){
    return '純棉'
  }
}
function getAbstractProductionFactory(clothingType){
  const clothingObj = {
    downJacket:DownJacket,
    underwear:Underwear,
    t_shirt:TShirt,
  }
  if(clothingObj[clothingType]){
    return clothingObj[clothingType]
  }
  throw new Error(`工廠暫時(shí)不支持生產(chǎn)這個(gè)${clothingType}類型的服裝`)
}
const downJacketClass = getAbstractProductionFactory('downJacket')
const underwearClass = getAbstractProductionFactory('underwear')
const downJacket = new downJacketClass()
const underwear = new underwearClass()
downJacket.production() // 材料:鴨毛,生產(chǎn)羽絨服
underwear.production() // 材料:絲光棉,生產(chǎn)內(nèi)衣

// 抽象類
class Clothing {
  constructor() {
    this.clothingType = ''
    this.price
  }
}
class Underwear extends Clothing {
  constructor() {
    super()
    this.clothingType = 'underwear'
    this.price = 10
  }
}
class TShirt extends Clothing {
  constructor() {
    super()
    this.clothingType = 't_shirt'
    this.price = 50
  }
}
class DownCoat extends Clothing {
  constructor() {
    super()
    this.clothingType = 'DownCoat'
    this.price = 500
  }
}
// 產(chǎn)品
class Purchase {
  constructor() {
    this.clothings = []
  }
  addClothing(clothing) {
    this.clothings.push(clothing)
  }
  countPrice() {
    return this.clothings.reduce((prev, cur)=>cur.price + prev,0)
  }
}
// 廠長
class FactoryManager {
  createUnderwear() {
    throw new Error(`子類必須重寫 createUnderwear`)
  }
  createTShirt() {
    throw new Error(`子類必須重寫 createTShirt`)
  }
  createDownCoat() {
    throw new Error(`子類必須重寫 DownCoat`)
  }
}
// 工人
class Worker extends FactoryManager {
  constructor() {
    super()
    this.purchase = new Purchase()
  }
  createUnderwear(num) {
    for (let i = 0; i < num; i++) {
      this.purchase.addClothing(new Underwear())
    }
  }
  createTShirt(num) {
    for (let i = 0; i < num; i++) {
      this.purchase.addClothing(new TShirt())
    }
  }
  createDownCoat(num) {
    for (let i = 0; i < num; i++) {
      this.purchase.addClothing(new DownCoat())
    }
  }
}
// 銷售
class Salesman {
  constructor() {
    this.worker = null
  }
  setWorker(worker) {
    this.worker = worker
  }
  reserve(clothing) {
    clothing.forEach((item) => {
      if (item.type === 'underwear') {
        this.worker.createUnderwear(item.num)
      } else if (item.type === 't_shirt') {
        this.worker.createTShirt(item.num)
      } else if (item.type === 'DownCoat') {
        this.worker.createDownCoat(item.num)
      } else {
        try {
          throw new Error('公司暫不生產(chǎn)或不存在該類型的商品')
        } catch (error) {
          console.log(error)
        }
      }
    });
    const purchase = this.worker.purchase
    return purchase.countPrice()
  }
}
const salesman = new Salesman()
const worker = new Worker()
salesman.setWorker(worker)
const order = [
  {
    type: 'underwear',
    num: 10
  },
  {
    type: 't_shirt',
    num: 4
  },
  {
    type: 'DownCoat',
    num: 1
  }
]
console.log(`本次訂單所需金額：${salesman.reserve(order)}`)

class LoginFrame {
    static instance = null
    constructor(state){
        this.state = state
    }
    show(){
        if(this.state === 'show'){
            console.log('登錄框已顯示')
            return
        }
        this.state = 'show'
        console.log('登錄框展示成功')
    }
    hide(){
        if(this.state === 'hide'){
            console.log('登錄框已隱藏')
            return
        }
        this.state = 'hide'
        console.log('登錄框隱藏成功')
    }
    // 通過靜態(tài)方法獲取靜態(tài)屬性instance上是否存在實(shí)例，如果沒有創(chuàng)建一個(gè)并返回，反之直接返回已有的實(shí)例
    static getInstance(state){
        if(!this.instance){
            this.instance = new LoginFrame(state)
        }
        return this.instance
    }
}
const p1 = LoginFrame.getInstance('show')
const p2 = LoginFrame.getInstance('hide')
console.log(p1 === p2) // true

class Jack {
  english() {
    return 'I speak English'
  }
}
class Xiaoming {
  chinese() {
    return '我只會(huì)中文'
  }
}
// 適配器
class XiaoHong {
  constructor(person) {
    this.person = person
  }
  chinese() {
    return `${this.person.english()} 翻譯： "我會(huì)說英語"`
  }
}
class Communication {
  speak(language) {
    console.log(language.chinese())
  }
}
const xiaoming = new Xiaoming()
const xiaoHong = new XiaoHong(new Jack())
const communication = new Communication()
communication.speak(xiaoming)
communication.speak(xiaoHong)

class Aircraft {
    ordinary(){
        console.log('發(fā)射普通子彈')
    }
}
class AircraftDecorator {
    constructor(aircraft){
        this.aircraft = aircraft
    }
    laser(){
        console.log('發(fā)射激光')
    }
    guidedMissile(){
        console.log('發(fā)射導(dǎo)彈')
    }
    ordinary(){
        this.aircraft.ordinary()
    }
}
const aircraft = new Aircraft()
const aircraftDecorator = new AircraftDecorator(aircraft)
aircraftDecorator.ordinary() // 發(fā)射普通子彈
aircraftDecorator.laser() // 發(fā)射激光
aircraftDecorator.guidedMissile() // 發(fā)射導(dǎo)彈
// 可以看到在不更改源代碼的情況下對(duì)它進(jìn)行了裝飾擴(kuò)展

// 員工
class Staff {
  constructor(affairType){
    this.affairType = affairType
  }
  applyFor(target){
    target.receiveApplyFor(this.affairType)
  }
}
// 秘書
class Secretary {
  constructor(){
    this.leader = new Leader()
  }
  receiveApplyFor(affair){
    this.leader.receiveApplyFor(affair)
  }
}
//領(lǐng)導(dǎo)
class Leader {
  receiveApplyFor(affair){
    console.log(`批準(zhǔn):${affair}`)
  }
}
const staff = new Staff('升職加薪')
staff.applyFor(new Secretary()) // 批準(zhǔn):升職加薪

function addEvent(el,type,fn){
    if(el.addEventlistener){// 高級(jí)游覽器添加事件DOM API
        el.addEventlistener(type,fn,false)
    }else if(el.attachEvent){// 低版本游覽器的添加事件API
        el.attachEvent(`on${type}`,fn)
    }else {//其他
        el[type] = fn
    }
}

function bindEvent(el,type,selector,fn){
    if(!fn){
        fn = selector
    }
    // 其他代碼
    console.log(el,type,fn)
}
bindEvent(document.body,'click','#root',()=>{})
bindEvent(document.body,'click',()=>{})

class Subject {
  constructor(){
    this.observers = {}
    this.key = ''
  }
  add(observer){
    const key = observer.project
    if (!this.observers[key]) {
      this.observers[key] = []
    }
    this.observers[key].push(observer)
  }
  remove(observer){
    const _observers = this.observers[observer.project]
    console.log(_observers,11)
    if(_observers.length){
      _observers.forEach((item,index)=>{
        if(item === observer){
          _observers.splice(index,1)
        }
      })
    }
  }
  setObserver(subject){
    this.key = subject
    this.notifyAllObservers()
  }
  notifyAllObservers(){
    this.observers[this.key].forEach((item,index)=>{
      item.update()
    })
  }
}
class Observer {
  constructor(project,name) {
    this.project = project
    this.name = name
  }
  update() {
    console.log(`尊敬的:${this.name} 你預(yù)約的項(xiàng)目：【${this.project}】 馬上開始了`)
  }
}
const subject = new Subject()
const xiaoming = new Observer('滑雪','xiaoming')
const A = new Observer('大跳臺(tái)','A')
const B = new Observer('大跳臺(tái)','B')
const C = new Observer('大跳臺(tái)','C')
subject.add(xiaoming)
subject.add(A)
subject.add(B)
subject.add(C)
subject.remove(B) // 取消訂閱
subject.setObserver('大跳臺(tái)')
/** 執(zhí)行結(jié)果
 * 尊敬的:A 你預(yù)約的項(xiàng)目：【大跳臺(tái)】 馬上開始了
 * 尊敬的:C 你預(yù)約的項(xiàng)目：【大跳臺(tái)】 馬上開始了
 */

// 內(nèi)部迭代器表示內(nèi)部已經(jīng)定義好了迭代規(guī)則，它完全接受整個(gè)迭代過程，外部只需一次初始調(diào)用。
Array.prototype.MyEach = function(fn){
    for(let i = 0;i<this.length;i++){
        fn(this[i],i,this)
    }
}
Array.prototype.MyEach = function(fn){
    for(let i = 0;i<this.length;i++){
        fn(this[i],i,this)
    }
}
[1,2,3,4].MyEach((item,index)=>{
    console.log(item,index)
})

// 外部迭代器必須顯示的迭代下一個(gè)元素。它增加了調(diào)用的復(fù)雜度，但也增加了迭代器的靈活性，可以手動(dòng)控制迭代的過程。
class Iterator{
    constructor(arr){
        this.current = 0
        this.length = arr.length
        this.arr = arr
    }
    next(){
        return this.getCurrItem()
    }
    isDone(){
        return this.current>=this.length
    }
    getCurrItem(){
        return {
            done:this.isDone(),
            value:this.arr[this.current++]
        }
    }
}
let iterator =new Iterator([1,2,3])
while(!(item=iterator.next()).done) { 
    console.log(item) 
}
iterator.next()
/* 下面的數(shù)據(jù)格式是不是有點(diǎn)熟悉
{done: false, value: 1}
{done: false, value: 2}
{done: false, value: 3}
{done: true, value: undefined}
*/

class State {
  constructor(attack){
    this.attack = attack
  }
  handle(context){
    console.log(this.attack)
    context.setState(this)
  }
}
class Context {
  constructor(){
    this.state = null
  }
  getState(){
    return this.state
  }
  setState(state){
    this.state = state
  }
}
const q1 = new State('q1 第1擊'),
      q2 = new State('q2 第2擊'),
      q3 = new State('q3 第3擊'),
      context = new Context()
q1.handle(context)//q1 第1擊
q2.handle(context)//q2 第2擊
q3.handle(context)//q3 第3擊

const rules = {
    cover_img: {
        must: false,
        msg: '請(qǐng)上傳封面圖片',
        val: ''
    },
    name: {
        must: true,
        msg: '姓名不能為空',
        val: ''
    },
    sex: {
        must: true,
        msg: '請(qǐng)?zhí)顚懶詣e',
        val: ''
    },
    birthday: {
        must: false,
        msg: '請(qǐng)選擇生日',
        val: ''
    },
}
function verify(){
    for(const key in rules){
        if(rules[key].must&&!rules[key].val){
            console.log(rules[key].msg)
        }
    }
}
verify()
// 姓名不能為空
// 請(qǐng)?zhí)顚懶詣e

//html-----------------
<form action="http:// xxx.com/register" id="registerForm" method="post">
    請(qǐng)輸入用戶名：<input type="text" name="userName" />
    請(qǐng)輸入密碼：<input type="text" name="password" />
    請(qǐng)輸入手機(jī)號(hào)碼：<input type="text" name="phoneNumber" />
    <button>提交</button>
</form>
// js------------------
class Strategies {
  constructor() {
    this.rules = {}
  }
  add(key, rule) {
    this.rules[key] = rule
    return this
  }
}
class Validator {
  constructor(strategies) {
    this.cache = [] // 保存檢驗(yàn)規(guī)則
    this.strategies = strategies
  }
  add(dom, rules) {
    rules.forEach((rule) => {
      const strategyAry = rule.strategy.split(':')
      this.cache.push(() => {
        const strategy = strategyAry.shift()
        strategyAry.unshift(dom.value)
        strategyAry.push(rule.errorMsg)
        console.log(this.strategies[strategy])
        return this.strategies[strategy].apply(dom, strategyAry)
      })
    });
  }
  start() {
    for (let i = 0,validatorFunc; validatorFunc =this.cache[i++]; ) {
      const msg = validatorFunc()
      if (msg) {
        return msg
      }
    }
  }
}
const registerForm = document.getElementById('registerForm') // 獲取formDom節(jié)點(diǎn)
const strategies = new Strategies()
strategies.add('isNonEmpty', function(value, errorMsg) {
  if (!value) {
    return errorMsg
  }
}).add('minLength', function(value, length, errorMsg) {
  if (value.length < length) {
    return errorMsg
  }
}).add('isMobile', function(value, errorMsg) {
  if (!/(^1[3|5|8][0-9]{9}$)/.test(value)) {
    return errorMsg
  }
})
function validataFunc() {
  const validator = new Validator(strategies.rules)
  // 多個(gè)校驗(yàn)規(guī)則
  validator.add(registerForm.userName, [
    {
      strategy: 'isNonEmpty',
      errorMsg: '用戶名不能為空'
    }, {
      strategy: 'minLength:10',
      errorMsg: '用戶名長度不能少于10位'
    }
  ])
  validator.add(registerForm.password, [{
    strategy: 'minLength:6',
    errorMsg: '密碼長度不能少于6位'
  }])
  validator.add(registerForm.phoneNumber, [{
    strategy: 'isMobile',
    errorMsg: '手機(jī)號(hào)碼格式不對(duì)'
  }])
  const errorMsg = validator.start()
  return errorMsg // 返回錯(cuò)誤信息。
}
registerForm.onsubmit = function () {
  const errorMsg = validataFunc()
  if (errorMsg) { // 如果存在錯(cuò)誤信息，顯示錯(cuò)誤信息，并且阻止onsubmit默認(rèn)事件
    console.log(errorMsg)
    return false
  }
}

// html-------------------
<button id="button2">點(diǎn)擊按鈕 1</button>
<button id="button2">點(diǎn)擊按鈕 2</button>
<button id="button3">點(diǎn)擊按鈕 3</button>
// js---------------------
const button1 = document.getElementById('button1'),
  button2 = document.getElementById('button2'),
  button3 = document.getElementById('button3');
  const MenBar = {
    refresh:function(){
      console.log('刷新菜單目錄')
    }
  }
  const SubMenu = {
    add:function(){
      console.log('增加子菜單')
    },
    del:function(){
      console.log('刪除子菜單')
    }
  }
  function setCommand(el,command){
    el.onclick = function(){
      command.execute()
    }
  }
  class MenuBarCommand{
    constructor(receiver,key){
      this.receiver = receiver
      this.key = key
    }
    execute(){
      this.receiver[this.key]()
    }
  }
  setCommand(button1,new MenuBarCommand(MenBar,'refresh'))
  setCommand(button2,new MenuBarCommand(SubMenu,'add'))
  setCommand(button3,new MenuBarCommand(SubMenu,'del'))

// 文件夾類
class Folder {
  constructor(name) {
    this.name = name
    this.parent = null;
    this.files = []
  }
  // 添加文件
  add(file) {
    file.parent = this
    this.files.push(file)
    return this
  }
  // 掃描文件
  scan() {
    console.log(`開始掃描文件夾：${this.name}`)
    this.files.forEach(file => {
      file.scan()
    });
  }
  // 刪除指定文件
  remove() {
    if (!this.parent) {
      return
    }
    for (let files = this.parent.files, i = files.length - 1; i >= 0; i--) {
      const file = files[i]
      if (file === this) {
        files.splice(i, 1)
        break
      }
    }
  }
}
// 文件類
class File {
  constructor(name) {
    this.name = name
    this.parent = null
  }
  add() {
    throw new Error('文件下面不能添加任何文件')
  }
  scan() {
    console.log(`開始掃描文件：${this.name}`)
  }
  remove() {
    if (!this.parent) {
      return
    }
    for (let files = this.parent.files, i = files.length - 1; i >= 0; i++) {
      const file = files[i]
      if (file === this) {
        files.splice(i, 1)
      }
    }
  }
}
const book = new Folder('電子書')
const js = new Folder('js')
const node = new Folder('node')
const vue = new Folder('vue')
const js_file1 = new File('javascript高級(jí)程序設(shè)計(jì)')
const js_file2 = new File('javascript忍者秘籍')
const node_file1 = new File('nodejs深入淺出')
const vue_file1 = new File('vue深入淺出')
const designMode = new File('javascript設(shè)計(jì)模式實(shí)戰(zhàn)')
js.add(js_file1).add(js_file2)
node.add(node_file1)
vue.add(vue_file1)
book.add(js).add(node).add(vue).add(designMode)
book.remove()
book.scan()

// 抽象父類
class Beverage {
  boilWater(){
    console.log('把水煮沸')
  }
  brew(){
    throw new Error('字類必須重寫brew方法')
  }
  pourInCup(){
    throw new Error('字類必須重寫pourInCup方法')
  }
  addCondiments(){
    throw new Error('字類必須重寫addCondiments方法')
  }
  init(){
    this.boilWater()
    this.brew()
    this.pourInCup()
    this.addCondiments()
  }
}
// 咖啡類
class Coffee extends Beverage {
  brew(){
    console.log('用沸水沖泡咖啡')
  }
  pourInCup(){
    console.log('把咖啡倒進(jìn)杯子')
  }
  addCondiments(){
    console.log('加糖和牛奶')
  }
}
// 茶類
class Tea extends Beverage {
  brew(){
    console.log('用沸水侵泡茶葉')
  }
  pourInCup(){
    console.log('把茶倒進(jìn)杯子')
  }
  addCondiments(){
    console.log('加檸檬')
  }
}
const coffee = new Coffee()
coffee.init()
const tea = new Tea()
tea.init()

let id = 0
// 定義內(nèi)部狀態(tài)
class Upload {
  constructor(uploadType) {
    this.uploadType = uploadType
  }
  // 點(diǎn)擊刪除時(shí) 小于3000直接刪除，大于3000通過confirm提示彈窗刪除。
  delFile(id) {
    uploadManager.setExternalState(id,this)
    if(this.fileSize < 3000){
      return this.dom.parentNode.removeChild(this.dom)
    }
    if(window.confirm(`確定要?jiǎng)h除該文件嗎？${this.fileName}`)){
      return this.dom.parentNode.removeChild(this.dom)
    }
  }
}
// 外部狀態(tài)
class uploadManager {
  static uploadDatabase = {}
  static add(id, uploadType, fileName, fileSize) {
    const filWeightObj = UploadFactory.create(uploadType)
    const dom = this.createDom(fileName, fileSize, () => {
      filWeightObj.delFile(id)
    })
    this.uploadDatabase[id] = {
      fileName,
      fileSize,
      dom
    }
  }
  // 創(chuàng)建DOM 并且為button綁定刪除事件。
  static createDom(fileName, fileSize, fn) {
    const dom = document.createElement('div')
    dom.innerHTML = `
      <span>文件名稱：${fileName}，文件大?。?{fileSize}</span>
      <button class="delFile">刪除</button>
    `
    dom.querySelector('.delFile').onclick = fn
    document.body.append(dom)
    return dom
  }
  static setExternalState(id, flyWeightObj) {
    const uploadData = this.uploadDatabase[id]
    for (const key in uploadData) {
      if (Object.hasOwnProperty.call(uploadData, key)) {
        flyWeightObj[key] = uploadData[key]
      }
    }
  }
}
// 定義一個(gè)工廠創(chuàng)建upload對(duì)象，如果其內(nèi)部狀態(tài)實(shí)例對(duì)象存在直接返回，反之創(chuàng)建保存并返回。
class UploadFactory {
  static createFlyWeightObjs = {}
  static create(uploadType) {
    if (this.createFlyWeightObjs[uploadType]) {
      return this.createFlyWeightObjs[uploadType]
    }
    return this.createFlyWeightObjs[uploadType] = new Upload(uploadType)
  }
}
// 開始加載
const startUpload = (uploadType, files)=>{
    for (let i = 0, file; file = files[i++];) {
      uploadManager.add(++id, uploadType, file.fileName, file.fileSize)
    }
}
startUpload('plugin', [
  {fileName: '1.txt',fileSize: 1000},
  {fileName: '2.html',fileSize: 3000},
  {fileName: '3.txt',fileSize: 5000}
]);
startUpload('flash', [
  {fileName: '4.txt',fileSize: 1000},
  {fileName: '5.html',fileSize: 3000},
  {fileName: '6.txt',fileSize: 5000}
]);

class Order500 {
    constructor(){
        this.orderType = 1
    }
    handle(orderType, pay, stock){
        if(orderType === this.orderType&&pay){
            console.log('500元定金預(yù)約，得到100元優(yōu)惠券')
        }else {
            return 'nextSuccessor'
        }
    }
}
class Order200 {
    constructor(){
        this.orderType = 2
    }
    handle(orderType, pay, stock){
        if(orderType === this.orderType&&pay){
            console.log('200元訂金預(yù)約，得到50元優(yōu)惠卷')
        }else {
            return 'nextSuccessor'
        }
    }
}
class OrderNormal {
    constructor(){
        this.stock = 0
    }
    handle(orderType, pay, stock){
        if (stock > this.stock) {
            console.log('普通購買，無優(yōu)惠卷')
          } else {
            console.log('手機(jī)庫存不足')
          }
    }
}
class Chain {
  constructor(order){
    this.order = order
    this.successor = null
  }
  setNextSuccessor(successor){
    return this.successor = successor
  }
  passRequest(...val){
    const ret = this.order.handle.apply(this.order,val)
    if(ret === 'nextSuccessor'){
      return this.successor&&this.successor.passRequest.apply(this.successor,val)
    }
    return ret
  }
}
console.log(new Order500())
var chainOrder500 = new Chain( new Order500() );
var chainOrder200 = new Chain( new Order200() );
var chainOrderNormal = new Chain( new OrderNormal() );
chainOrder500.setNextSuccessor( chainOrder200 );
chainOrder200.setNextSuccessor( chainOrderNormal );
chainOrder500.passRequest( 1, true, 500 ); // 輸出：500 元定金預(yù)購，得到 100 優(yōu)惠券
chainOrder500.passRequest( 2, true, 500 ); // 輸出：200 元定金預(yù)購，得到 50 優(yōu)惠券
chainOrder500.passRequest( 3, true, 500 ); // 輸出：普通購買，無優(yōu)惠券
chainOrder500.passRequest( 1, false, 0 ); // 輸出：手機(jī)庫存不足

// html-----------
選擇顏色：<select name="" id="colorSelect">
    <option value="">請(qǐng)選擇</option>
    <option value="red">紅色</option>
    <option value="blue">藍(lán)色</option>
  </select>
  <br />
  選擇內(nèi)存：<select name="" id="memorySelect">
    <option value="">請(qǐng)選擇</option>
    <option value="32G">32G</option>
    <option value="63G">64G</option>
  </select>
  <br />
  輸入購買數(shù)量：<input type="text" id="numberInput" />
  <br />
  <div>你選擇了顏色：<span id="colorInfo"></span></div>
  <div>你選擇了內(nèi)存：<span id="memoryInfo"></span></div>
  <div>你選擇了數(shù)量：<span id="numberInfo"></span></div>
  <button id="nextBtn" disabled="true">請(qǐng)選擇手機(jī)顏色和購買數(shù)量</button>
  // js -------------------
const goods = {
      "red|32G": 3,
      "red|16G": 0,
      "blue|32G": 1,
      "blue|16G": 6
    },
      colorSelect = document.getElementById('colorSelect'),
      memorySelect = document.getElementById('memorySelect'),
      numberInput = document.getElementById('numberInput'),
      colorInfo = document.getElementById('colorInfo'),
      memoryInfo = document.getElementById('memoryInfo'),
      numberInfo = document.getElementById('numberInfo'),
      nextBtn = document.getElementById('nextBtn'),
      mediator = (function () {
        return {
          changed(obj) {
            const color = colorSelect.value,
              memory = memorySelect.value,
              number = numberInput.value,
              stock = goods[`${color}|${memory}`]
            if (obj === colorSelect) {
              colorInfo.innerHTML = color
            } else if (obj === memorySelect) {
              memoryInfo.innerHTML = memory
            } else if (obj === numberInput) {
              numberInfo.innerHTML = number
            }
            if (!color) {
              nextBtn.disabled = true
              nextBtn.innerHTML = '請(qǐng)選擇手機(jī)顏色'
              return
            }
            if (!memory) {
              nextBtn.disabled = true
              nextBtn.innerHTML = '請(qǐng)選擇內(nèi)存大小'
              return
            }
            if (Number.isInteger(number - 0) && number < 1) {
              nextBtn.disabled = true
              nextBtn.innerHTML = '請(qǐng)輸入正確的購買數(shù)量'
              return
            }
            nextBtn.disabled = false
            nextBtn.innerHTML = '放入購物車'
          }
        }
      })()
    colorSelect.onchange = function () {
      mediator.changed(this)
    }
    memorySelect.onchange = function () {
      mediator.changed(this)
    }
    numberInput.oninput = function () {
      mediator.changed(this)
    }

const user = {
    name:'小明',
    age:'30',
    getInfo(){
        console.log(`姓名：${this.name}，年齡：${this.age}`)
    }
}
const xiaozhang = Object.create(user)
xiaozhang.name = '小張'
xiaozhang.age = 18
xiaozhang.getInfo() // 姓名：小張，年齡：18
user.getInfo() // 姓名：小明，年齡：30

// 棋子
class ChessPieces {
  constructor(){
    this.chess = {}
  }
  // 獲取棋子
  getChess(){
    return this.chess
  }
}
// 記錄棋路
class Record {
  constructor(){
    this.chessTallyBook = [] // 記錄棋路
  }
  recordTallyBook(chess){
    // console.log(this.chessTallyBook.includes(chess))
    const isLoadtion = this.chessTallyBook.some(
      item=>item.location === chess.location
    )
    if(isLoadtion){
      console.log(`${chess.type},${chess.location}已存在其他棋子`)
    }else {
      this.chessTallyBook.push(chess)
    }
    // this.chessTallyBook.some(item=>item.location === chess.location)
  }
  getTallyBook(){
    return this.chessTallyBook.pop()
  }
}
// 下棋規(guī)則
class ChessRule {
  constructor(){
    this.chessInfo = {}
  }
  playChess(chess){
    this.chessInfo = chess
  }
  getChess(){
    return this.chessInfo
  }
  // 記錄棋路
  recordTallyBook(){
    return new ChessPieces(this.chessInfo)
  }
  // 悔棋
  repentanceChess(chess){
    this.chessInfo = chess.getTallyBook()
  }
}
const chessRule = new ChessRule()
const record = new Record()
chessRule.playChess({
  type:'黑棋',
  location:'X10,Y10'
})
record.recordTallyBook(chessRule.getChess())//記錄棋路
chessRule.playChess({
  type:'白棋',
  location:'X11,Y10'
})
record.recordTallyBook(chessRule.getChess())//記錄棋路
chessRule.playChess({
  type:'黑棋',
  location:'X11,Y11'
})
record.recordTallyBook(chessRule.getChess())//記錄棋路
chessRule.playChess({
  type:'白棋',
  location:'X12,Y10'
})
console.log(chessRule.getChess())//{type:'白棋',location:'X12,Y10'}
chessRule.repentanceChess(record) // 悔棋
console.log(chessRule.getChess())//{type:'黑棋',location:'X11,Y11'}
chessRule.repentanceChess(record) // 悔棋
console.log(chessRule.getChess())//{type:'白棋',location:'X11,Y10'}

class Phone {
    constructor(brand,modle){
        this.brand = brand
        this.modle = modle
    }
    showPhone(){
        return `手機(jī)的品牌：${this.brand.getBrand()},型號(hào)${this.modle.getModle()}`
    }
}
class Brand {
    constructor(brandName){
        this.brandName = brandName
    }
    getBrand(){
        return this.brandName
    }
}
class Modle {
    constructor(modleName){
        this.modleName = modleName
    }
    getModle(){
        return this.modleName
    }
}
const phone = new Phone(new Brand('華為'),new Modle('mate 40'))
console.log(phone.showPhone())

    class Phone {
      accept() {
        throw new Error('子類的accept必須被重寫')
      }
    }
    class Mata40Pro extends Phone {
      accept() {
        const phoneVisitor = new PhoneVisitor()
        return phoneVisitor.visit(this)
      }
    }
    class IPhone13 extends Phone {
      accept() {
        const phoneVisitor = new PhoneVisitor()
        return phoneVisitor.visit(this)
      }
    }
    // 訪問者類
    class PhoneVisitor {
      visit(phone) {
        if (phone.constructor === IPhone13) {
          return {
            os: 'ios',
            chip: 'A15仿生芯片',
            screen: '電容屏'
          }
        } else if (phone.constructor === Mata40Pro) {
          return {
            os: 'HarmonyOS',
            chip: 'Kirin 9000',
            GPUType: 'Mali-G78',
            port: 'type-c'
          }
        }
      }
    }
    const mata40Pro = new Mata40Pro()
    console.log(mata40Pro.accept())

class TerminalExpression {
  constructor(data) {
    this.data = data
  }
  interpret(context) {
    if (context.indexOf(this.data) > -1) {
      return true;
    }
    return false;
  }
}
class OrExpression {
  constructor(expr1, expr2) {
    this.expr1 = expr1;
    this.expr2 = expr2;
  }
  interpret(context) {
    return this.expr1.interpret(context) || this.expr2.interpret(context);
  }
}
class AndExpression {
  constructor(expr1, expr2) {
    this.expr1 = expr1;
    this.expr2 = expr2;
  }
  interpret(context) {
    return this.expr1.interpret(context) && this.expr2.interpret(context);
  }
}
class InterpreterPatternDemo {
  static getMaleExpression() {
    const robert = new TerminalExpression("小明");
    const john = new TerminalExpression("小龍");
    return new OrExpression(robert, john);
  }
  static getMarriedWomanExpression() {
    const julie = new TerminalExpression("張三");
    const married = new TerminalExpression("小紅");
    return new AndExpression(julie, married);
  }
  static init(args) {
    const isMale = this.getMaleExpression();
    const isMarriedWoman = this.getMarriedWomanExpression();
    console.log(`小龍是男性?${isMale.interpret("小龍")}`)
    console.log(`小紅是一個(gè)已婚婦女?${isMarriedWoman.interpret("小紅 張三")}`)
  }
}
InterpreterPatternDemo.init()