原生JS实现记忆翻牌游戏

<div id="game">
 <!-- div.block*16>div.pic -->
</div>

* {
 padding: 0;
 margin: 0;
}

#game {
 width: 600px;
 height: 600px;
 margin: 0 auto;
}

.block {
 float: left;
 box-sizing: border-box;
 width: 25%;
 height: 25%;
 border: 2px solid #ddd;
 background-color: #f0f0f0;
}

.block:hover {
 background-color: #2b84d0;
}

.pic {
 width: 100%;
 height: 100%;
 background-repeat: no-repeat;
 background-position: center center;
 transform: scaleX(0);
 transition: transform .2s;
}

.block.on .pic {
 transform: scaleX(1)
}

var game = {
 el: '',
 level: 0, 
 blocks: 0, 
 gameWidth: 600, 
 gameHeight: 600, 
 dataArr: [],
 judgeArr: [],
 turnNum: 0,
 picNum: 20, 
 maxLevel: 3, // 最高游戏级别
 init: function (options) {
 this.initData(options);
 this.render();
 this.handle();
 },
 initData: function (options) {
 this.options = options;
 this.el = options.el;
 this.level = options.level > this.maxLevel ? this.maxLevel : options.level;
 this.blocks = (this.level * 2) * (this.level * 2);
 this.getdataArr();
 },
 getdataArr: function () {
 var randomArr = this.randomArr(); 
 var halfBlocks = this.blocks / 2;
 var dataArr = [];

 for(var i = 0; i < halfBlocks; i ++) {
  var num = randomArr[i];
  var info = {
  url: './images/' + num + '.png',
  id: num
  }
  dataArr.push(info, info);
 }
 console.log(dataArr);
 this.dataArr = this.shuffle(dataArr);
 },
 randomArr: function () {
 var picNum = this.picNum;
 var arr = [];
 for(var i = 0; i < picNum; i ++) {
  arr.push(i + 1);
 }
 console.log(arr);
 return this.shuffle(arr);
 },
 shuffle: function (arr) {
 return arr.sort(function () {
  return 0.5 - Math.random();
 })
 var length = arr.length - 1;
 for(var i = length ; i >= 0; i --) {
  var randomIndex = Math.floor(Math.random() * (i + 1));
  var temp = arr[randomIndex];
  arr[randomIndex] = arr[i];
  arr[i] = temp;
 }
 return arr;
 },
 render: function () {
 var blocks = this.blocks;
 var gameWidth = this.gameWidth;
 var gameHeight = this.gameHeight;
 var level = this.level;
 var blockWidth = gameWidth / ( level * 2 );
 var blockHeight = gameHeight / ( level * 2 );
 var dataArr = this.dataArr;

 for(var i = 0; i < blocks; i ++) {
  var info = dataArr[i];
  var oBlock = document.createElement('div');
  var oPic = document.createElement('div');
  oPic.style.backgroundImage = 'url(' + info.url + ')';
  oBlock.style.width = blockWidth + 'px';
  oBlock.style.height = blockHeight + 'px';
  oBlock.picid = info.id;
  oPic.setAttribute('class', 'pic');
  oBlock.setAttribute('class', 'block');
  oBlock.appendChild(oPic);
  this.el.appendChild(oBlock);
 
 handle: function () {
 var self = this;
 this.el.onclick = function (e) {
  var dom = e.target;
  var isBlock = dom.classList.contains('block');
  if(isBlock) {
  self.handleBlock(dom);
  }
 }
 },
 handleBlock: function (dom) {
 var picId = dom.picid;
 var judgeArr = this.judgeArr;
 var judgeLength = judgeArr.push({
  id: picId,
  dom: dom
 });
 dom.classList.add('on');

 if(judgeLength === 2) { this.judgePic(); }
 this.judgeWin();
 },
 judgePic: function () {
 var judgeArr = this.judgeArr; 
 var isSamePic = judgeArr[0].id === judgeArr[1].id;
 
 if(isSamePic) {
  this.turnNum += 2;
 } else {
  var picDom1 = judgeArr[0].dom;
  var picDom2 = judgeArr[1].dom;
  setTimeout(function () {
  picDom1.classList.remove('on');
  picDom2.classList.remove('on');
  }, 800)
 }
 judgeArr.length = 0;
 },
 judgeWin: function () {

 if(this.turnNum === this.blocks) {
  setTimeout(function () {
  alert('胜利');
  }, 300)
 }
 }
}

game.init({
 el: document.getElementById('game'),
 level: 2
})