Write 2048 mini game example code using native js-JS Tutorial-php.cn

This article mainly introduces the sample code for writing 2048 mini-game using native js, which has a very good reference value. Let’s take a look at the effect with the editor.
Picture:
Write 2048 mini game example code using native js
The code is as follows:
<!DOCTYPE html>
<html>
<head>
 <title> 2048-game </title>
 <meta charset="utf-8" />
 <style media="screen">
 #game {
 display: none;
 position: absolute;
 left: 0px;
 top: 0px;
 right: 0px;
 bottom: 0px;
 background-color: #9DA5C3;
 opacity: 0.5;
 z-index: 1;
 }
 .clear:after {
 content: "";
 display: table;
 clear: both;
 }
 .left {
 float: left;
 }
 .right {
 float: right;
 }
 .scoreShow {
 height: 50px;
 text-align: center;
 line-height: 50px;
 }
 .model {
 text-decoration: none;
 color: white;
 background-color: #bbada0;
 font-size: 36px;
 border-radius: 10px;
 }
 .head {
 width: 480px;
 height: 50px;
 margin: 0 auto;
 font-size: 25px;
 }
 #gridPanel {
 width: 480px;
 height: 480px;
 margin: 0 auto;
 background-color: #bbada0;
 border-radius: 10px;
 position: relative;
 z-index: 1;
 }
 .grid,
 .cell {
 width: 100px;
 height: 100px;
 border-radius: 6px;
 }
 .grid {
 background-color: #ccc0b3;
 float: left;
 margin: 16px 0 0 16px;
 }
 .cell {
 position: absolute;
 font-size: 60px;
 text-align: center;
 line-height: 100px;
 color: #fff;
 }
 .n2 {
 background-color: #eee3da
 }
 .n4 {
 background-color: #ede0c8
 }
 .n8 {
 background-color: #f2b179
 }
 .n16 {
 background-color: #f59563
 }
 .n32 {
 background-color: #f67c5f
 }
 .n64 {
 background-color: #f65e3b
 }
 .n128 {
 background-color: #edcf72
 }
 .n256 {
 background-color: #edcc61
 }
 .n512 {
 background-color: #9c0
 }
 .n1024 {
 background-color: #33b5e5
 }
 .n2048 {
 background-color: #09c
 }
 .n4096 {
 background-color: #a6c
 }
 .n8192 {
 background-color: #93c
 }
 .n2,
 .n4 {
 color: #776e65
 }
 #gameover {
 width: 100%;
 display: none;
 position: fixed;
 left: 50%;
 right: 50%;
 top: 148px;
 width: 220px;
 height: 200px;
 border-radius: 10px;
 background-color: white;
 margin-left: -110px;
 text-align: center;
 z-index: 5;
 }
 #gameover>a {
 display: inline-block;
 width: 170px;
 height: 50px;
 border-radius: 10px;
 text-decoration: none;
 background-color: #9F8D77;
 color: white;
 font-size: 36px;
 }
 </style>
</head>
<body>
 <p id="game">
 </p>
 <p class="head clear">
 <p class="scoreShow left">
 <span>Score:</span>
 <span id="score"></span>
 </p>
 <p class="selction right" onclick="getModel(event)">
 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="model" value="3">3X3</a>
 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="model" value="4">4X4</a>
 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="model" type="button">5X5</a>
 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="model" type="button">6X6</a>
 <!-- <input type="text" id="model"> -->
 <!-- <button type="button" name="button" id="set">设置游戏</button> -->
 </p>
 </p>
 <p id="gridPanel">
 </p>
 <p id="gameover">
 <h1 id="Score"></h1>
 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="again" onclick="obj.gameStart()">Try again</a>
 </p>
 <script type="text/javascript">
 var arr = [];
 function $(id) {
 return document.getElementById(id);
 }
 function C(cls) {
 return document.getElementsByClassName(cls);
 }
 var obj = {
 ROW: 4,
 CELL: 4,
 r: 0,
 c: 0,
 f: 0, //r行 c列 f查找的下一位置
 keyCd: 0,
 score: 0,
 createEle: 0, //是否需要创建元素
 eleFragment: "", //文档片段变量
 //游戏开始
 gameStart: function() {
 obj.init();
 document.onkeydown = function(e) { //自动获得事件对象
 switch (e.keyCode) { //判断按键号
 case 37:
 obj.keyCd = 1;
 obj.moveLeft();
 break;
 case 38:
 obj.keyCd = 2;
 obj.moveUp();
 break;
 case 39:
 obj.keyCd = 1;
 obj.moveRight();
 break;
 case 40:
 obj.keyCd = 2;
 obj.moveDown();
 break;
 }
 $("score").innerHTML = obj.score; //更新分数
 }
 },
 //初始化
 init: function() {
 obj.eleFragment = document.createDocumentFragment();
 for (r = 0; r < obj.ROW; r++) {
 arr.push([]);
 for (c = 0; c < obj.CELL; c++) {
 arr[r][c] = 0;
 if (obj.createEle == 1) {
 obj.create(r, c);
 }
 }
 }
 if (obj.createEle == 1) {
 obj.createEle = 0;
 $("gridPanel").innerHTML = ""; //清空原有的元素
 $("gridPanel").appendChild(obj.eleFragment); //添加元素
 }
 obj.score = 0;
 $("score").innerHTML = obj.score;
 $("game").style.display = "none";
 $("gameover").style.display = "none";
 obj.random(); //开始游戏随机生成两个数
 obj.random();
 obj.updateView();
 },
 //创建p元素，添加到gridPanel中
 create: function(r, c) {
 var grid, cell;
 var increment = 14,
 grWidth, grHeight, grMarginTop, grMarginLeft, ceWidth, ceHight;
 grid = document.createElement("p");
 cell = document.createElement("p");
 grid.id = "g" + r + c;
 grid.className = "grid";
 cell.id = "c" + r + c;
 cell.className = "cell";

 if (obj.ROW == 3) {
 increment = 24;
 } else if (obj.ROW == 4) {
 increment = 18;
 }
 grWidth = grHeight = ceWidth = ceHight = 66 + (6 - obj.ROW) * increment; //优化后
 grMarginTop = grMarginLeft = (480 - grWidth * obj.ROW) / (obj.ROW + 1);
 grid.style.width = grWidth + "px";
 grid.style.height = grHeight + "px";
 grid.style.marginTop = grMarginTop + "px";
 grid.style.marginLeft = grMarginLeft + "px";
 cell.style.width = ceWidth + "px";
 cell.style.height = ceHight + "px";
 cell.style.top = grMarginTop + r * (grMarginTop + ceWidth) + "px";
 cell.style.left = grMarginLeft + c * (grMarginLeft + ceHight) + "px";
 cell.style.lineHeight = ceHight + "px";
 cell.style.fontSize = 30 + (6 - obj.ROW) * 10 + "px";
 //优化前
 /*if (obj.ROW == 3) {
 grid.style.width = "140px";
 grid.style.height = "140px";
 grid.style.margin = "15px 0 0 15px";
 cell.style.width = "140px";
 cell.style.height = "140px";
 cell.style.top = 15 + r * 155 + "px"; //设置距离上一位置的高度
 cell.style.left = 15 + c * 155 + "px"; //设置离左一位置的距离
 cell.style.lineHeight = "140px";
 } else if (obj.ROW == 4) {
 grid.style.width = "100px";
 grid.style.height = "100px";
 grid.style.margin = "16px 0 0 16px";
 cell.style.width = "100px";
 cell.style.height = "100px";
 cell.style.top = 16 + r * 116 + "px";
 cell.style.left = 16 + c * 116 + "px";
 cell.style.lineHeight = "100px";
 } else if (obj.ROW == 5) {
 grid.style.width = "75px";
 grid.style.height = "75px";
 grid.style.margin = "17.5px 0 0 17.5px";
 cell.style.width = "75px";
 cell.style.height = "75px";
 cell.style.top = 17.5 + r * 92.5 + "px";
 cell.style.left = 17.5 + c * 92.5 + "px";
 cell.style.fontSize = "40px";
 cell.style.lineHeight = "75px";
 } else if (obj.ROW == 6) {
 grid.style.width = "66px";
 grid.style.height = "66px";
 grid.style.margin = "12px 0 0 12px";
 cell.style.width = "66px";
 cell.style.height = "66px";
 cell.style.top = 12 + r * 78 + "px";
 cell.style.left = 12 + c * 78 + "px";
 cell.style.fontSize = "30px";
 cell.style.lineHeight = "66px";
 }*/
 obj.eleFragment.appendChild(grid);
 obj.eleFragment.appendChild(cell);
 },
 //随机产生一个新的数
 random: function() {
 while (1) {
 var row = Math.floor(Math.random() * obj.ROW);
 var cell = Math.floor(Math.random() * obj.CELL);
 if (arr[row][cell] == 0) { //判断生成的随机数位置为0才随机生成2或4
 arr[row][cell] = (Math.random() > 0.5) ? 4 : 2;
 break;
 }
 }
 // var row = Math.floor(Math.random() * 4);
 // var cell = Math.floor(Math.random() * 4);
 // if (arr[row][cell] == 0) { //判断生成的随机数位置为0才随机生成2或4
 // arr[row][cell] = (Math.random() > 0.5) ? 4 : 2;
 // return;
 // }
 // obj.random();//递归影响执行效率
 },
 //更新页面
 updateView: function() {
 var win = 0;
 for (r = 0; r < obj.ROW; r++) {
 for (c = 0; c < obj.CELL; c++) {
 if (arr[r][c] == 0) { //值为0的不显示
 $("c" + r + c).innerHTML = ""; //0不显示
 $("c" + r + c).className = "cell" //清除样式
 } else {
 $("c" + r + c).innerHTML = arr[r][c];
 $("c" + r + c).className = "cell n" + arr[r][c]; //添加不同数字的颜色
 if (obj.ROW == 3 && arr[r][c] == 1024) {
 win = 1;
 } else if (obj.ROW == 4 && arr[r][c] == 2048) {
 win = 1;
 } else if (obj.ROW == 5 && arr[r][c] == 4096) {
 win = 1;
 } else if (obj.ROW == 6 && arr[r][c] == 8192) {
 win = 1;
 }
 }
 }
 }
 if (win == 1) { //通关
 $("game").style.display = "block";
 $("gameover").style.display = "block";
 $("Score").innerHTML = "You win!<br>Score:" + obj.score;
 }
 if (obj.isGameOver()) { //游戏失败
 $("game").style.display = "block";
 $("gameover").style.display = "block";
 $("Score").innerHTML = "GAME OVER!<br>Score:" + obj.score;
 console.log("gameover");
 }
 },
 //游戏失败
 isGameOver: function() {
 for (r = 0; r < obj.ROW; r++) {
 for (c = 0; c < obj.CELL; c++) {
 if (arr[r][c] == 0) { //有0还不是gameover
 return false;
 } else if (c != obj.CELL - 1 && arr[r][c] == arr[r][c + 1]) { //左往右 前一个和下一个不相等
 return false;
 } else if (r != obj.ROW - 1 && arr[r][c] == arr[r + 1][c]) { //上往下 上一个和下一个不相等
 return false;
 }
 }
 }
 return true;
 },
 //查找下一个不为0的数值的位置
 find: function(r, c, start, condition, direction) {
 if (obj.keyCd == 2) { //上下按键
 if (direction == 1) { //向上按键 f++
 for (var f = start; f < condition; f += direction) {
 if (arr[f][c] != 0) {
 return f;
 }
 }
 } else { //向下按键 f--
 for (var f = start; f >= condition; f += direction) {
 if (arr[f][c] != 0) {
 return f;
 }
 }
 }
 } else { //左右按键
 if (direction == 1) { //左按键 f++
 for (var f = start; f < condition; f += direction) {
 if (arr[r][f] != 0) {
 return f;
 }
 }
 } else { //右按键 f--
 for (var f = start; f >= condition; f += direction) {
 if (arr[r][f] != 0) {
 return f;
 }
 }
 }
 }
 return null; //循环结束仍然没有找到！=0的数值，返回null
 },
 //左按键的处理
 dealToLeft: function(r) {
 var next;
 for (c = 0; c < obj.ROW; c++) {
 next = obj.find(r, c, c + 1, obj.CELL, 1); //找出第一个不为0的位置
 if (next == null) break; //没有找到就返回
 //如果当前位置为0
 if (arr[r][c] == 0) {
 arr[r][c] = arr[r][next]; //把找到的不为0的数值替换为当前位置的值
 arr[r][next] = 0; //找到的位置清0
 c--; //再次循环多一次，查看后面否有值与替换后的值相同，
 } else if (arr[r][c] == arr[r][next]) { //如果当前位置与找到的位置数值相等，则相加
 arr[r][c] *= 2;
 arr[r][next] = 0;
 obj.score += arr[r][c];
 }
 }
 },
 move: function(itertor) {
 var before, //没处理前
 after; //after处理后
 before = arr.toString();
 itertor(); //执行for函数
 after = arr.toString();
 if (before != after) { //前后对比，如果不同就update
 obj.random();
 obj.updateView();
 }
 },
 moveLeft: function() {
 obj.move(function() {
 for (r = 0; r < obj.ROW; r++) {
 obj.dealToLeft(r);
 }
 })
 // if 当前位置 不为零
 // 从当前位置，下一个成员开始，遍历，
 // 如果找到，与当前位置相等的数，
 // 两者相加，并把不为零的成员，设置为零
 // 如果 当前位置是 零
 // 从当前位置下一个成员开始遍历
 // 如果找到 第一个不为零的成员
 // 当前位置数值设置为这个不为零的成员的值 ，并且把那个不为零的成员设置为 0
 },
 //右按键处理
 dealToRight: function(r) {
 var next;
 for (c = obj.CELL - 1; c >= 0; c--) {
 next = obj.find(r, c, c - 1, 0, -1); //找出第一个不为0的位置
 if (next == null) break; //没有找到就返回
 //如果当前位置为0
 if (arr[r][c] == 0) {
 arr[r][c] = arr[r][next]; //把找到的不为0的数值替换为当前位置的值
 arr[r][next] = 0; //找到的位置清0
 c++; //再次循环多一次，查看后面否有值与替换后的值相同，
 } else if (arr[r][c] == arr[r][next]) { //如果当前位置与找到的位置数值相等，则相加
 arr[r][c] *= 2;
 arr[r][next] = 0;
 obj.score += arr[r][c];
 }
 }
 },
 moveRight: function() {
 obj.move(function() {
 for (r = 0; r < obj.ROW; r++) {
 obj.dealToRight(r);
 }
 })
 },
 //上按键处理
 dealToUp: function(c) {
 var next;
 for (r = 0; r < obj.ROW; r++) {
 next = obj.find(r, c, r + 1, obj.ROW, 1); //找出第一个不为0的位置
 if (next == null) break;
 //如果当前位置为0
 if (arr[r][c] == 0) {
 arr[r][c] = arr[next][c]; //把找到的不为0的数值替换为当前位置的值
 arr[next][c] = 0; //找到的位置清0
 r--; //再次循环多一次，查看后面否有值与替换后的值相同
 } else if (arr[r][c] == arr[next][c]) { //如果当前位置与找到的位置数值相等，则相加
 arr[r][c] *= 2;
 arr[next][c] = 0;
 obj.score += arr[r][c];
 }
 }
 },
 moveUp: function() {
 obj.move(function() {
 for (c = 0; c < obj.CELL; c++) {
 obj.dealToUp(c);
 }
 })
 },
 //下按键处理
 dealToDown: function(c) {
 var next;
 for (r = obj.ROW - 1; r >= 0; r--) {
 next = obj.find(r, c, r - 1, 0, -1); //找出第一个不为0的位置
 if (next == null) {
 break;
 }
 //如果当前位置为0
 if (arr[r][c] == 0) {
 arr[r][c] = arr[next][c]; //把找到的不为0的数值替换为当前位置的值
 arr[next][c] = 0; //找到的位置清0
 r++; //再次循环多一次，查看后面否有值与替换后的值相同
 } else if (arr[r][c] == arr[next][c]) { //如果当前位置与找到的位置数值相等，则相加
 arr[r][c] *= 2;
 arr[next][c] = 0;
 obj.score += arr[r][c];
 }
 }
 },
 moveDown: function() {
 obj.move(function() {
 for (c = 0; c < obj.CELL; c++) {
 obj.dealToDown(c);
 }
 })
 }
 }
 window.onload = function() {
 obj.createEle = 1;
 obj.gameStart();
 }
 //切换模式
 function getModel(e) { //事件冒泡获取a元素
 var a = e.target,
 modelValue = 4;
 if (a.nodeName == "A") {
 if (a.innerHTML == "3X3") {
 modelValue = 3;
 } else if (a.innerHTML == "4X4") {
 modelValue = 4;
 } else if (a.innerHTML == "5X5") {
 modelValue = 5;
 } else if (a.innerHTML == "6X6") {
 modelValue = 6;
 }
 obj.ROW = obj.CELL = modelValue;
 obj.createEle = 1; //需要创建格子p元素的标志
 obj.gameStart();
 }
 }
 // var modelValue = parseInt($("model").value);
 // if (isNaN(modelValue)) {
 // modelValue = 4; //默认是4*4
 // }
 // if (modelValue <= 2 || modelValue > 6) return; //2格或者大于6格无效
 // obj.ROW = modelValue;
 // obj.CELL = modelValue;
 // obj.createEle = 1;
 // obj.gameStart();
 // console.log(modelValue);
 // }
 </script>
</body>
</html>
Copy after login
The above is the detailed content of Write 2048 mini game example code using native js. For more information, please follow other related articles on the PHP Chinese website!