第用JS實(shí)現(xiàn)貪吃蛇游戲本文實(shí)例為大家分享了JS實(shí)現(xiàn)貪吃蛇游戲的具體代碼，供大家參考，具體內(nèi)容如下

效果圖：

完整代碼如下：

html：

!DOCTYPEhtml

htmllang="en"

head

metacharset="UTF-8"

metahttp-equiv="X-UA-Compatible"content="IE=edge"

metaname="viewport"content="width=device-width,initial-scale=1.0"

titleDocument/title

linkrel="stylesheet"href="index.css"

scriptsrc="index.js"/script

/head

body

div

divbutton/button/div

divbutton/button/div

divid="snakeWrap"

!--div/div

div/div

div/div--

/div

/div

/body

/html

css：

.content{

position:relative;

width:640px;

height:640px;

margin:100pxauto;

.btn{

width:100%;

height:100%;

position:absolute;

top:0;

left:0;

background-color:black;

opacity:.1;

z-index:2;

.btnbutton{

background:none;

border:none;

background-size:100%100%;

cursor:pointer;

outline:none;

position:absolute;

left:50%;

top:50%;

.startBtnbutton{

width:200px;

height:80px;

background-image:url(../貪吃蛇/img/btn.gif);

margin-left:-100px;

margin-top:-40px;

.pauseBtn{

display:none;

.pauseBtnbutton{

width:70px;

height:70px;

background-image:url(../貪吃蛇/img/btn4.png);

margin-left:-35px;

margin-top:-35px;

#snakeWrap{

width:600px;

height:600px;

background-color:pink;

border:20pxsolidpurple;

position:relative;

/*#snakeWrapdiv{

width:20px;

height:20px;

.snakeHead{

background-image:url(../貪吃蛇/img/snake.png);

background-size:cover;

.snakeBody{

background-color:rgb(85,146,126);

border-radius:50%;

.food{

background-image:url(../貪吃蛇/img/草莓.png);

background-size:cover;

}

js：

window.addEventListener('load',function(){

//聲明方塊的寬高，行數(shù)和列數(shù)

varsw=20,

sh=20,

tr=30,

td=30;

varsnake=null,//蛇的實(shí)例

food=null,//食物的實(shí)例

game=null;//游戲的實(shí)例

functionSquare(x,y,classname){

this.x=sw*x;

this.y=sh*y;

this.class=classname;

this.viewContent=document.createElement('div');//方塊對(duì)應(yīng)的DOM元素

this.viewContent.className=this.class;

this.parent=document.getElementById('snakeWrap');//方塊的父級(jí)

}

//創(chuàng)建方塊DOM，并添加到頁面里

Stotype.create=function(){

this.viewContent.style.position='absolute';

this.viewContent.style.width=sw+'px';

this.viewContent.style.height=sh+'px';

this.viewContent.style.left=this.x+'px';

this.viewContent.style.top=this.y+'px';

this.parent.appendChild(this.viewContent);

};

Stotype.remove=function(){

this.parent.removeChild(this.viewContent);

};

//蛇

functionSnake(){

this.head=null//存蛇頭的信息

this.tail=null//存蛇尾的信息

this.pos=[];//存蛇身上每個(gè)方塊的位置

//存儲(chǔ)蛇走的方向，用一個(gè)對(duì)象來表示

this.directionNum={

left:{

x:-1,

y:0,

rotate:180

},

right:{

x:1,

y:0,

rotate:0

},

up:{

x:0,

y:-1,

rotate:-90

},

down:{

x:0,

y:1,

rotate:90

}

};

}

//初始化

Stotype.init=function(){

//創(chuàng)建蛇頭

varsnakeHead=newSquare(2,0,'snakeHead');

snakeHead.create();

this.head=snakeHead;//存儲(chǔ)蛇頭信息

this.pos.push([2,0]);//把蛇頭的位置存起來

//創(chuàng)建蛇身體1

varsnakeBody1=newSquare(1,0,'snakeBody');

snakeBody1.create();

this.pos.push([1,0]);//把蛇身1的坐標(biāo)存起來

//創(chuàng)建蛇身體2

varsnakeBody2=newSquare(0,0,'snakeBody');

snakeBody2.create();

this.tail=snakeBody2;//把蛇尾的信息存起來

this.pos.push([0,0]);//把蛇身1的坐標(biāo)存起來

//形成鏈表關(guān)系

snakeHead.last=null;

snakeHead.next=snakeBody1;

snakeBody1.last=snakeHead;

snakeBody1.next=snakeBody2;

snakeBody2.last=snakeBody1;

snakeBody2.next=null;

//給蛇添加一條屬性，用來表示蛇的走向

this.direction=this.directionNum.right;//默認(rèn)讓蛇往右走

};

//該方法用來獲取蛇頭的下一個(gè)位置對(duì)應(yīng)的元素，要根據(jù)元素做不同的事情

Stotype.getNextPos=function(){

varnextPos=[//蛇頭要走的下一個(gè)點(diǎn)的坐標(biāo)

this.head.x/sw+this.direction.x,

this.head.y/sh+this.direction.y

];

//console.log(nextPos[0]);

//下個(gè)點(diǎn)是自己，游戲結(jié)束

varselfCollied=false;//是否撞到自己，默認(rèn)是否

//value表示數(shù)組中的某一項(xiàng)

this.pos.forEach(function(value){

//console.log(nextPos[0],value[0]);

if(value[0]==nextPos[0]value[1]==nextPos[1]){

selfCollied=true;

//console.log(2);

}

});

if(selfCollied){

console.log('撞到自己了!');

this.strategies.die.call(this);

return;

}

//下個(gè)點(diǎn)是墻，游戲結(jié)束

if(nextPos[0]0||nextPos[1]0||nextPos[0]td-1||nextPos[1]tr-1){

console.log('撞墻!');

this.strategies.die.call(this);

return;

}

//下個(gè)點(diǎn)是食物，吃

if(foodfood.pos[0]==nextPos[0]food.pos[1]==nextPos[1]){

//如這條件成立，說明蛇頭走的下一點(diǎn)是食物的點(diǎn)

console.log('撞到食物了');

this.strategies.eat.call(this);

return;

}

//下個(gè)點(diǎn)什么都不是，繼續(xù)走

this.strategies.move.call(this);

};

//處理碰撞后要做的事

Stotype.strategies={

move:function(format){//format這個(gè)參數(shù)用于決定要不要?jiǎng)h除最后一個(gè)方塊（蛇尾）,當(dāng)傳了這個(gè)參數(shù)就表示要做的事情是吃

//創(chuàng)建新身體（在舊蛇頭的位置）

varnewBody=newSquare(this.head.x/sw,this.head.y/sh,'snakeBody');

//更新鏈表的關(guān)系

newBody.next=this.head.next;

newBody.next.last=newBody;

newBody.last=null;

//把舊蛇頭從原來的位置刪除

this.head.remove();

newBody.create();

//創(chuàng)建新的蛇頭（蛇頭下一個(gè)要走到的點(diǎn)nextPos）

varnewHead=newSquare(this.head.x/sw+this.direction.x,this.head.y/sh+this.direction.y,'snakeHead');

//更新鏈表關(guān)系

newHead.next=newBody;

newHead.last=null;

newBody.last=newHead;

newHead.viewContent.style.transform='rotate('+this.direction.rotate+'deg)';

newHead.create();

//蛇身上的每一個(gè)方塊的坐標(biāo)也要更新

this.pos.splice(0,0,[this.head.x/sw+this.direction.x,this.head.y/sh+this.direction.y])

this.head=newHead;//還要把this.head的信息更新一下

if(!format){//如果format的值為false，表示需要?jiǎng)h除（除了吃之外的操作）

this.tail.remove();

this.tail=this.tail.last;

this.pos.pop();

}

},

eat:function(){

this.strategies.move.call(this,true);

createFood();

game.score++;

},

die:function(){

//console.log('die');

game.over();

}

}

snake=newSnake();

//創(chuàng)建食物

functioncreateFood(){

//食物小方塊的隨機(jī)坐標(biāo)

varx=null;

vary=null;

varinclude=true;//循環(huán)跳出的條件，true表示食物坐標(biāo)在蛇身上。（需要繼續(xù)循環(huán)）false表示食物的坐標(biāo)不再蛇身上（不用繼續(xù)循環(huán)）

while(include){

x=Math.round(Math.random()*(td-1));

y=Math.round(Math.random()*(tr-1));

snake.pos.forEach(function(value){

if(x!=value[0]y!=value[1]){

//這個(gè)條件成立說明現(xiàn)在隨機(jī)出來的這個(gè)坐標(biāo)，在蛇身上沒有找到。

include=false;

}

});

}

//生成食物

food=newSquare(x,y,'food');

//存儲(chǔ)生成食物的坐標(biāo)，用于跟蛇頭要走的下一坐標(biāo)對(duì)比

food.pos=[x,y];

varfoodDom=document.querySelector('.food');

if(foodDom){

foodDom.style.left=x*sw+'px';

foodDom.style.top=y*sh+'px';

}else{

food.create();

}

}

//創(chuàng)建游戲邏輯

functionGame(){

this.timer=null;

this.score=0;

}

Gtotype.init=function(){

snake.init();

//snake.getNextPos();

createFood();

varflag=true;

document.onkeydown=function(ev){

//當(dāng)蛇在往右走，不能按左鍵

if(ev.which==37snake.direction!=snake.directionNum.right){

if(flag){

flag=false;

setTimeout(function(){

snake.direction=snake.directionNum.left;

flag=true;

},150)

}

}elseif(ev.which==38snake.direction!=snake.directionNum.down){

if(flag){

flag=false;

setTimeout(function(){

snake.direction=snake.directionNum.up;

flag=true;

},150)

}

}elseif(ev.which==39snake.direction!=snake.directionNum.left){

if(flag){

flag=false;

setTimeout(function(){

snake.direction=snake.directionNum.right;

flag=true;

},150)

}

}elseif(ev.which==40snake.direction!=snake.directionNum.up){

if(flag){

flag=false;

setTimeout(function(){

snake.direction=snake.directionNum.down;

flag=true;

},150)

}

}

}

this.start();

};

//開始游戲

Gtotype.start=function(){

this.timer=setInterval(function(){

snake.getNextPos();

},150);

};

//暫停游戲

Gtotype.pause=function(){

clearInterval(this.timer);

};

//游戲結(jié)束

Gt