原生js编写贪吃蛇小游戏原生js编写贪吃蛇小游戏

【原生js编写贪吃蛇小游戏】本文实例为大家分享了js编写贪吃蛇小游戏的具体代码，供大家参考，具体内容如下
刚学完js模仿着教程，把自己写的js原生小程序。
HTML部分

Document - 锐客网

css部分

/* 整体样式 */.content{width: 640px; height: 640px; margin: 100px auto; position: relative; } .btn{width: 100%; height: 100%; position: absolute; left: 0; top: 0; background-color: rgba(0, 0, 0, 0.3); z-index: 2; }.btn button{background: none; border: none; background-size: 100% 100%; cursor: pointer; outline: none; position: absolute; left: 50%; top: 50%; }.startBtn button{width: 200px; height: 80px; background: url(../images/Snipaste_2021-05-08_08-52-45.png) no-repeat; background-size: contain; margin-left: -100px; margin-top: 222px; }#snakeWrap{width: 600px; height: 600px; background: #73aad4; border: 20px solid #13649c; position: relative; }.snakeHead{background-color: yellowgreen; border-radius: 50%; }.snakeBody{background-color: black; border-radius: 50%; }.food{background-color: red; border-radius: 50%; }

js部分

var sw = 20,//一个方块的宽sh = 20,//一个方块的宽tr = 30,//行数td = 30; //列数var snake = null,//生成蛇的实例food = null; //生成食物的实例game = null; //创建游戏实例//把整体看成是一个一个小方块移动的的时候创建和删除方块(后续所有方块的生成都会调用)// 方块构造函数function Square(x,y,classname){//对应css中三种蛇的样式（蛇头蛇身蛇尾）this.x = x * sw; this.y = y * sh; this.class = classname; this.viewContent = document.createElement('div'); this.viewContent.className = this.class; //将创建出来的div添加对应css样式this.parent = document.getElementById('snakeWrap'); }//在方块构造函数的原型链上创建create方法确定新div的具体信息//this指向SquareSquare.prototype.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); //把新创建的div添加到页面}//在方块构造函数的原型链上创建remove方法用于移动时删除方块Square.prototype.remove = function(){this.parent.removeChild(this.viewContent); }// 蛇function Snake(){this.head = null; //存储蛇头信息this.tail = null; //存储蛇尾信息this.pos = []; //存储蛇身上的每一个方块的位置this.directionNum = {//存储蛇走的方向left : {x : -1,y : 0},right : {x : 1,y : 0},up : {x : 0,y : -1},down : {x : 0,y : 1}}}//this 指向 SnakeSnake.prototype.init = function(){//初始化// 创建蛇头var snakeHead = new Square(2,0,'snakeHead'); snakeHead.create(); this.head = snakeHead; this.pos.push([2,0]); //储存蛇头信息// 创建蛇身1var snakeBody1 = new Square(1,0,'snakeBody'); snakeBody1.create(); this.pos.push([1,0]); //储存蛇身信息// 创建蛇尾var snakeBody2 = new Square(0,0,'snakeBody'); snakeBody2.create(); this.tail = snakeBody2; this.pos.push([0,0]); /储存蛇尾信心//形成链表关系//蛇头蛇身蛇尾的前后关系snakeHead.last = null; snakeHead.next = snakeBody1; snakeBody1.last = snakeHead; snakeBody1.next = snakeBody2; snakeBody2.last = snakeBody1; snakeBody2.next = null; //给蛇添加一个默认方向向右this.direction = this.directionNum.right; }// 获取蛇头的下一个位置对应的元素（this指向Snake）// 获取下一个点的坐标并储存到nextPos数组Snake.prototype.getNextPos = function(){var nextPos = [this.head.x/sw + this.direction.x,//this.direction.x、y 下面会将方向与键盘事件绑定来确定下一个点生成的位置this.head.y/sh + this.direction.y]// 下个点是自己，撞到了自己游戏结束var selfCollied = false; this.pos.forEach(function(value){//forEach遍历数组两数组比较看是否有重复坐标if (value[0] == nextPos[0] && value[1] == nextPos[1]){selfCollied = true; }}) //撞到了自己游戏结束if(selfCollied){this.、.die.call(this); return; }// 下个点是围墙游戏结束if(nextPos[0] > 29 || nextPos[0] < 0 || nextPos[1] > 29 || nextPos[1] < 0){this.strategies.die.call(this); return; }// 下个点是食物吃if(food && food.pos[0] == nextPos[0] && food.pos[1] == nextPos[1]){this.strategies.eat.call(this); return; }// 下个点什么都不是走this.strategies.move.call(this); }// 碰撞后要做的事Snake.prototype.strategies = {move : function(format){ //参数用于判断是否删除蛇尾// 创建一个newbody,删掉蛇头var newBody = new Square(this.head.x/sw,this.head.y/sh,'snakeBody')newBody.next = this.head.next; newBody.next.last = newBody; newBody.last = null; this.head.remove(); newBody.create(); // 创建一个新蛇头var newx = this.head.x/sw + this.direction.x; var newy = this.head.y/sh + this.direction.y; var newHead = new Square(newx,newy,'snakeHead')newHead.next = newBody; newBody.last = newHead; newHead.last = null; newHead.create(); // 更新蛇身的坐标this.pos.splice(0,0,[newx,newy]); this.head = newHead; //如果为false则吃if(!format){this.tail.remove(); this.tail = this.tail.last; this.pos.pop(); }},eat : function(){this.strategies.move.call(this,true); game.score ++; createFood(); },die : function(){game.over(); }}snake = new Snake(); // 创建食物function createFood(){// 食物小方块坐标var x = null; var y = null; var include = true; 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]){include = false; }}); }// 生成食物food = new Square(x,y,'food'); food.pos = [x,y]; var foodDom = document.querySelector('.food'); if(foodDom){foodDom.style.left = x * sw + 'px'; foodDom.style.top = y * sh + 'px'; }else{food.create(); }}// 创建游戏逻辑function Game(){this.timer = null; this.score = 0; }Game.prototype.init = function(){snake.init(); createFood(); //这里曾经的e.keycode e.which 都已禁用使用e.keywindow.addEventListener('keydown',function(e){if(e.key == 'ArrowLeft' && snake.direction != snake.directionNum.right){snake.direction = snake.directionNum.left; }else if(e.key == 'ArrowUp' && snake.direction != snake.directionNum.down){snake.direction = snake.directionNum.up; }else if(e.key == 'ArrowRight' && snake.direction != snake.directionNum.left){snake.direction = snake.directionNum.right; }else if(e.key == 'ArrowDown' && snake.direction != snake.directionNum.up){snake.direction = snake.directionNum.down; }}); this.start(); }Game.prototype.start = function(){this.timer = setInterval(function(){snake.getNextPos(); },0.0000000000000001)}Game.prototype.over = function(){clearInterval(this.timer); alert('你的得分为' + this.score); // 游戏回到最初始状态var snakeWrap = document.getElementById('snakeWrap'); snakeWrap.innerHTML = ''; snake = new Snake(); game = new Game(); var startBtnWrap = document.querySelector('.startBtn'); startBtnWrap.style.display = 'block'; }// 开启游戏game = new Game(); var startBtn = document.querySelector('.startBtn button'); startBtn.onclick = function(){startBtn.parentNode.style.display = 'none'; game.init(); }

简单的一个小游戏，如有问题请大佬指正。
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。