Home > Article > Web Front-end > 2048 mini-game written using Javascript_javascript skills
2048 mini-game written using Javascript_javascript skills
- WBOYOriginal
- 2016-05-16 15:30:041521browse
On a whim recently, the project is over. I use JavaScript to write a small game. Let’s practice it. If the writing is not good, please give me criticism and suggestions.
HTML code is as follows
<!DOCTYPE html> <html> <head> <title></title> <meta charset="utf-8" /> <link rel="stylesheet" href="2048.css"/> <script src="2048.js"></script> <script> </script> </head> <body> <p>Score:<span id="score"></span></p> <div id="gridPanel"> <!--背景格--> <!--第1行--> <div id="g00" class="grid"></div> <div id="g01" class="grid"></div> <div id="g02" class="grid"></div> <div id="g03" class="grid"></div> <!--第2行--> <div id="g10" class="grid"></div> <div id="g11" class="grid"></div> <div id="g12" class="grid"></div> <div id="g13" class="grid"></div> <!--第3行--> <div id="g20" class="grid"></div> <div id="g21" class="grid"></div> <div id="g22" class="grid"></div> <div id="g23" class="grid"></div> <!--第4行--> <div id="g30" class="grid"></div> <div id="g31" class="grid"></div> <div id="g32" class="grid"></div> <div id="g33" class="grid"></div> <!--前景格--> <!--第1行--> <div id="c00" class="cell"></div> <div id="c01" class="cell"></div> <div id="c02" class="cell"></div> <div id="c03" class="cell"></div> <!--第2行--> <div id="c10" class="cell"></div> <div id="c11" class="cell"></div> <div id="c12" class="cell"></div> <div id="c13" class="cell"></div> <!--第3行--> <div id="c20" class="cell"></div> <div id="c21" class="cell"></div> <div id="c22" class="cell"></div> <div id="c23" class="cell"></div> <!--第4行--> <div id="c30" class="cell"></div> <div id="c31" class="cell"></div> <div id="c32" class="cell"></div> <div id="c33" class="cell"></div> </div> <div id="gameOver"><!--同时包含前景和背景的容器--> <div><!--半透明灰色背景--></div> <p><!--居中小窗口--> Game Over!<br> Score:<span id="finalScore"></span><br> <a class="button" onclick="game.start()">Try again!</a> </p> </div> </body> </html>
CSS code is as follows
@charset "utf-8";
#gridPanel{width:480px;height:480px;
margin:0 auto;
background-color:#bbada0;
border-radius:10px;
position:relative;
}
.grid,.cell{width:100px; height:100px;
border-radius:6px;
}
.grid{background-color:#ccc0b3;
margin:16px 0 0 16px;
float:left;
}
.cell{
/*margin:16px 0 0 16px;
float:left;
position:relative;
z-index:10;
top:-464px;
left:0;*/
position:absolute;
text-align:center;
line-height:100px;
font-size:60px;
}
#c00,#c01,#c02,#c03{top:16px;}
#c10,#c11,#c12,#c13{top:132px;}
#c20,#c21,#c22,#c23{top:248px;}
#c30,#c31,#c32,#c33{top:364px;}
#c00,#c10,#c20,#c30{left:16px;}
#c01,#c11,#c21,#c31{left:132px;}
#c02,#c12,#c22,#c32{left:248px;}
#c03,#c13,#c23,#c33{left:364px;}
.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}
.n8,.n16,.n32,.n64,
.n128,.n256,.n512,
.n1024,.n2048,.n4096,.n8192{color:#fff}
.n1024,.n2048,.n4096,.n8192{font-size:40px}
/*分数显示*/
p{width:480px; margin:0 auto;
font-family:Arial;font-weight:bold;
font-size:40px; padding-top:15px;
}
/*Game Over*/
#gameOver{width:100%; height:100%;
position:absolute; top:0; left:0;
display:none;
}
#gameOver>div{width:100%; height:100%;
background-color:#555; opacity:.5;
}
#gameOver>p{width:300px; height:200px;
border:1px solid #edcf72;
line-height:1.6em; text-align:center;
background-color:#fff; border-radius:10px;
position:absolute; top:50%; left:50%;
margin-top:-135px; margin-left:-150px;
}
.button{padding:10px; border-radius:6px;
background-color:#9f8b77; color:#fff;
cursor:pointer;
}
The javascript code is as follows
var game={
data:[],//保存所有数字的二维数组
rn:4, //总行数
cn:4, //总列数
state: 0, //游戏当前状态：Running|GameOver
RUNNING:1,
GAMEOVER:0,
score:0, //分数
isGameOver:function(){//判断游戏状态为结束
//如果没有满,则返回false
if(!this.isFull()){
return false;
}else{//否则
//从左上角第一个元素开始，遍历二维数组
for(var row=0;row<this.rn;row++){
for(var col=0;col<this.cn;col++){
//如果当前元素不是最右侧元素
if(col<this.cn-1){
// 如果当前元素==右侧元素
if(this.data[row][col]==
this.data[row][col+1]){
return false;
}
}
//如果当前元素不是最下方元素
if(row<this.rn-1){
// 如果当前元素==下方元素
if(this.data[row][col]==
this.data[row+1][col]){
return false;
}
}
}
}return true;
}
},
start:function(){//游戏开始
this.state=this.RUNNING;
//找到游戏结束界面，隐藏
var div=document.getElementById("gameOver");
div.style.display="none";
this.data=[//初始化二维数组
[0,0,0,0],
[0,0,0,0],
[0,0,0,0],
[0,0,0,0]
];
this.score=0; //重置分数为0
/*for(var r=0;r<this.rn;r++){
this.data[r]=[];//向空数组中添加每一行数组
for(var c=0;c<this.cn;c++){
//向当前空行数组中加默认元素0
this.data[r][c]=0;
}
}*/
//在两个随机位置生成2或4
this.randomNum();
this.randomNum();
//将数据更新到页面
this.updateView();
},
isFull:function(){//判断当前数组是否已满
for(var row=0;row<this.rn;row++){//遍历二维数组
for(var col=0;col<this.cn;col++){
// 只要发现当前元素==0
if(this.data[row][col]==0){
return false;
}
}
}
//(如果循环正常退出)
return true;
},
randomNum:function(){//在随机空位置生成一个数
if(!this.isFull()){//如果*不*满，才{
while(true){//循环true
//0-3随机生成一个行号row
var row=parseInt(Math.random()*this.rn);
//0-3随机生成一个列号col
var col=parseInt(Math.random()*this.cn);
//如果data[row][col]==0
if(this.data[row][col]==0){
// Math.random():<0.5 >=0.5
// 2 4
// 随机生成一个数<0.5?2:4，
// 放入data[row][col]
this.data[row][col]=
Math.random()<0.5?2:4;
break;//退出循环
}
}
}
},
updateView:function(){
//将二维数组中每个格的数字放入前景格中
//遍历二维数组中每个元素,比如:row=2,col=3, 16
for(var row=0;row<this.rn;row++){
for(var col=0;col<this.cn;col++){
/*网页中一切元素，属性，文字都是对象*/
var div=document.getElementById("c"+row+col);
//"c23"
var curr=this.data[row][col]; //当前元素值
//修改div开始标签和结束标签之间的内容
div.innerHTML=curr!=0?curr:"";
//修改div的class属性
div.className=curr!=0?"cell n"+curr:"cell"
// class
}
}
var span=document.getElementById("score");
span.innerHTML=this.score;
//判断并修改游戏状态为GAMEOVER
if(this.isGameOver()){
this.state=this.GAMEOVER;
var div=document.getElementById("gameOver");
var span=document.getElementById("finalScore");
span.innerHTML=this.score;
//修改div的style属性下的display子属性为"block"
div.style.display="block";
}
},//updateView方法的结束
/*实现左移*/
/*找当前位置右侧，*下一个*不为0的数*/
getRightNext:function(row,col){
//循环变量:nextc——>指下一个元素的列下标
//从col+1开始,遍历row行中剩余元素，<cn结束
for(var nextc=col+1;nextc<this.cn;nextc++){
// 如果遍历到的元素!=0
if(this.data[row][nextc]!=0){
// 就返回nextc
return nextc;
}
}return -1;//(循环正常退出，就)返回-1
},
/*判断并左移*指定行*中的每个元素*/
moveLeftInRow:function(row){
//col从0开始，遍历row行中的每个元素，<cn-1结束
for(var col=0;col<this.cn-1;col++){
// 获得当前元素下一个不为0的元素的下标nextc
var nextc=this.getRightNext(row,col);
// 如果nextc==-1，(说明后边没有!=0的元素了)
if(nextc==-1){
break;
}else{// 否则
// 如果当前位置==0,
if(this.data[row][col]==0){
// 将下一个位置的值，当入当前位置
this.data[row][col]=
this.data[row][nextc];
// 下一个位置设置为0
this.data[row][nextc]=0;
col--;//让col退一格，重复检查一次
}else if(this.data[row][col]==
this.data[row][nextc]){
// 否则，如果当前位置==nextc的位置
// 将当前位置*=2;
this.data[row][col]*=2;
// 下一个位置设置为0;
this.data[row][nextc]=0;
// 将当前位置的值，累加到score上
this.score+=this.data[row][col];
}
}
}
},
/*移动所有行*/
moveLeft:function(){
var oldStr=this.data.toString();
//循环遍历每一行
for(var row=0;row<this.rn;row++){
// 调用moveLeftInRow方法，传入当前行号row
this.moveLeftInRow(row);
}//(循环结束后)
var newStr=this.data.toString();
if(oldStr!=newStr){
//调用randomNum()，随机生成一个数
this.randomNum();
//调用updateView()，更行页面
this.updateView();
}
},
moveRight:function(){
var oldStr=this.data.toString();
for(var row=0;row<this.rn;row++){
this.moveRightInRow(row);
}
var newStr=this.data.toString();
if(oldStr!=newStr){
this.randomNum();
this.updateView();
}
},
/*判断并右移*指定行*中的每个元素*/
moveRightInRow:function(row){
//col从cn-1开始，到>0结束
for(var col=this.cn-1;col>0;col--){
var nextc=this.getLeftNext(row,col);
if(nextc==-1){
break;
}else{
if(this.data[row][col]==0){
this.data[row][col]=
this.data[row][nextc];
this.data[row][nextc]=0;
col++;
}else if(this.data[row][col]==
this.data[row][nextc]){
this.data[row][col]*=2;
this.data[row][nextc]=0;
this.score+=this.data[row][col];
}
}
}
},
/*找当前位置左侧，下一个不为0的数*/
getLeftNext:function(row,col){
//nextc从col-1开始，遍历row行中剩余元素，>=0结束
for(var nextc=col-1;nextc>=0;nextc--){
// 遍历过程中，同getRightNext
if(this.data[row][nextc]!=0){
return nextc;
}
}return -1;
},
/*获得任意位置下方不为0的位置*/
getDownNext:function(row,col){
//nextr从row+1开始，到<this.rn结束
for(var nextr=row+1;nextr<this.rn;nextr++){
if(this.data[nextr][col]!=0){
return nextr;
}
}return -1;
},
/*判断并上移*指定列*中的每个元素*/
moveUpInCol:function(col){
//row从0开始，到<rn-1，遍历每行元素
for(var row=0;row<this.rn-1;row++){
// 先获得当前位置下方不为0的行nextr
var nextr=this.getDownNext(row,col);
if(nextr==-1){ break; // 如果nextr==-1
}else{// 否则
// 如果当前位置等于0
if(this.data[row][col]==0){
// 将当前位置替换为nextr位置的元素
this.data[row][col]=
this.data[nextr][col];
// 将nextr位置设置为0
this.data[nextr][col]=0;
row--;//退一行，再循环时保持原位
}else if(this.data[row][col]==
this.data[nextr][col]){
// 否则，如果当前位置等于nextr位置
// 将当前位置*=2
this.data[row][col]*=2;
// 将nextr位置设置为0
this.data[nextr][col]=0;
// 将当前位置的值累加到score属性上
this.score+=this.data[row][col];
}
}
}
},
/*上移所有列*/
moveUp:function(){
var oldStr=this.data.toString();
//遍历所有列
for(var col=0;col<this.cn;this.moveUpInCol(col++));
var newStr=this.data.toString();
if(oldStr!=newStr){
this.randomNum();
this.updateView();
}
},
/*下移所有列*/
moveDown:function(){
var oldStr=this.data.toString();
for(var col=0;col<this.cn;this.moveDownInCol(col++));
var newStr=this.data.toString();
if(oldStr!=newStr){
this.randomNum();
this.updateView();
}
},
moveDownInCol:function(col){
//row从this.rn-1，到>0结束，row--
for(var row=this.rn-1;row>0;row--){
var nextr=this.getUpNext(row,col);
if(nextr==-1){
break;
}else{
if(this.data[row][col]==0){
this.data[row][col]=
this.data[nextr][col];
this.data[nextr][col]=0;
row++;
}else if(this.data[row][col]==
this.data[nextr][col]){
this.data[row][col]*=2;
this.data[nextr][col]=0;
this.score+=this.data[row][col];
}
}
}
},
/*获得任意位置上方不为0的位置*/
getUpNext:function(row,col){
for(var nextr=row-1;nextr>=0;nextr--){
if(this.data[nextr][col]!=0){
return nextr;
}
}return -1;
}
}
//onload事件：当页面加载*后*自动执行
window.onload=function(){
game.start();//页面加载后，自动启动游戏
//当按键盘按键时，触发移动:
document.onkeydown=function(){
//获得事件对象中键盘号：2步
//事件对象：在事件发生时自动创建
// 封装了事件的信息
if(game.state==game.RUNNING){
//Step1: 获得事件对象
var e=window.event||arguments[0];
//IE DOM标准
//Step2: 获得键盘号:e.keyCode
if(e.keyCode==37){
game.moveLeft();
}else if(e.keyCode==39){
game.moveRight();
}else if(e.keyCode==38){
game.moveUp();
}else if(e.keyCode==40){
game.moveDown();
}
//如果按左键，调用moveLeft
//否则如果按右键，调用moveRight
}
}
}
The above code is a 2048 mini-game written in JavaScript. The code is simple and easy to understand and comes with comments. I hope you like it.
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