本文实例为大家分享了js实现贪吃蛇小游戏的具体代码，供大家参考，具体内容如下

class Map{

constructor(){

this.w = 800;

this.h = 400;

this.c = "#ccc";

this.createEle();

}

createEle(){

this.mapEle = document.createElement("div");

this.mapEle.style.cssText = `width:${this.w}px;height:${this.h}px;background:${this.c};margin:0 auto;position:relative;border:solid 10px black;`;

document.body.appendChild(this.mapEle);

}

}

class Food{

constructor(){

this.w = 20;

this.h = 20;

this.c = "red";

this.x = 0;

this.y = 0;

this.createEle();

}

createEle(){

this.foodEle = document.createElement("div");

this.foodEle.style.cssText = `width:${this.w}px;height:${this.h}px;background:${this.c};

position:absolute;left:${this.x * this.w}px;top:${this.y * this.h}px;`;

m.mapEle.appendChild(this.foodEle);

}

randomPos(){

this.x = random(0,(m.w-this.w) / this.w);

this.y = random(0,(m.h-this.h) / this.h);

this.foodEle.style.left = this.x * this.w + "px";

this.foodEle.style.top = this.y * this.h + "px";

}

}

class Snake{

constructor(){

this.w = 20;

this.h = 20;

this.body = [{

ele:null,

x:4,

y:3,

c:randomColor()

},{

ele:null,

x:3,

y:3,

c:randomColor()

},{

ele:null,

x:2,

y:3,

c:randomColor()

}];

this.d = "right";

this.createEle();

}

createEle(){

for(var i=0;i

if(!this.body[i].ele){

this.body[i].ele = document.createElement("div");

m.mapEle.appendChild(this.body[i].ele);

}

this.body[i].ele.style.cssText = `width:${this.w}px;height:${this.h}px;background:${this.body[i].c};

position:absolute;left:${this.body[i].x * this.w}px;top:${this.body[i].y * this.h}px;`;

}

this.body[0].ele.innerHTML = "0";

setTimeout(()=>{

this.move();

},300);

}

move(){

for(var i=this.body.length-1; i>0; i--){

this.body[i].x = this.body[i-1].x;

this.body[i].y = this.body[i-1].y;

}

switch(this.d){

case "left":

this.body[0].x -= 1;

break;

case "right":

this.body[0].x += 1;

break;

case "top":

this.body[0].y -= 1;

break;

case "bottom":

this.body[0].y += 1;

break;

}

if(this.body[0].x < 0 || this.body[0].y < 0 || this.body[0].x > ((m.w-this.w) / this.w) || this.body[0].y > ((m.h-this.h) / this.h)){

alert("撞墙了");

return;

}

if(this.body[0].x === f.x && this.body[0].y === f.y){

this.body.push({

ele:null,

x:this.body[this.body.length-1].x,

y:this.body[this.body.length-1].y,

c:randomColor()

})

f.randomPos();

}

for(var i=1;i

if(this.body[0].x == this.body[i].x && this.body[0].y == this.body[i].y){

alert("撞到自己了");

return;

}

}

this.createEle();

}

direct(type){

switch(type){

case 37:

if(this.d === "right") break;

this.d = "left";

break;

case 38:

if(this.d === "bottom") break;

this.d = "top";

break;

case 39:

if(this.d === "left") break;

this.d = "right";

break;

case 40:

if(this.d === "top") break;

this.d = "bottom";

break;

}

}

}

function random(a,b){

return Math.round(Math.random()*(a-b)+b)

}

function randomColor(){

return `rgb(${random(0,255)},${random(0,255)},${random(0,255)})`

}

var m = new Map();

var f = new Food();

f.randomPos();

var s = new Snake();

document.onkeydown = function(eve){

var e = eve || window.event;

var code = e.keyCode || e.which;

s.direct(code);

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。