本篇文章给大家分享的是有关使用js怎么实现简单贪吃蛇小游戏，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title></title> <style> * { margin: 0; padding: 0; } .l { float: left; } .r { float: right; } .clear_fix::after { content: ''; height: 0; width: 100%; display: block; clear: both; overflow: hidden; visibility: hidden; } .body { margin: 50px 0 0 50px; width: 700px; } .cont { width: 500px; height: 500px; border: 1px solid green; margin-right: 8px; position: relative; } .cont div { position: absolute; width: 10px; height: 10px; background-color: orange; border: 1px solid #000; box-sizing: border-box; } .cont .snakeHead { border-radius: 50%; } .cont span { position: absolute; display: inline-block; width: 10px; height: 10px; border: 1px solid #000; box-sizing: border-box; border-radius: 50%; background: green; } .score { width: 188px; height: 500px; border: 1px solid red; } .score p { text-align: center; height: 50px; line-height: 50px; font-size: 30px; margin: 20px 0; color: brown } .score .time{ color: chartreuse; font-size: 20px; } .btn { margin-left: 50px } .btn .active { background-color: green; } button { width: 100px; height: 30px; font-size: 24px; } </style> </head> <body> <div id="wrap"> <div class="body clear_fix"> <div class="cont l"> </div> <div class="score l">分数: </br> <p>0分</p> <hr> 时间： <p class="time"></p> </div> </div> <div class="btn"> <button>开始</button> <button class="active">普通</button> <button>困难</button> <button>地狱</button> </div> </div> <script> var snake = { /* 初始化全局属于，已经添加初始事件监听 */ init: function () { this.btns = document.querySelectorAll('button'); this.score = document.querySelector('p'); this.cont = document.querySelector('.cont'); //时间显示的容器 this.time = document.querySelector('.time'); //蛇的方向，'r'表示向右 this.dir = 'r'; /* 定时器 */ this.timer = ''; /* 初始蛇头位置 */ this.head = { l: 30, t: 10 } //蛇尾 this.ender = { l: '', t: '' }; this.foodItem = { l: '', t: '' }; //为开始的状态 this.isStart = false; /* 计分器 */ this.counter = 0; //简单status为1，困难为2，地狱为3 this.status = 1; this.speed = 10 this.btns[0].onclick = this.startFn //开始或者暂停 this.btns[1].onclick = this.simpleFn //简单模式监听 this.btns[2].onclick = this.difcultFn //困难模式监听 this.btns[3].onclick = this.hardFn //地狱模式监听 this.initCreate(); this.getTime() //随机一个食物 this.getfood() }, initCreate() { //创建一个初始蛇头和蛇身3块 for (let i = 0; i <= 3; i++) { let item = document.createElement('div'); Object.assign(item.style, { left: this.head.l - 10 * i + 'px', top: this.head.t + 'px', /* borderRaduis: '50%' */ }) if (i == 0) { item.className = 'snakeHead' } snake.cont.appendChild(item); } }, /* 增加蛇身一节 */ createSnake: function (obj) { clearInterval(snake.timer) var div = document.createElement('div'); div.style.left = snake.ender.l; div.style.top = snake.ender.t; snake.cont.appendChild(div); console.log(snake.cont.children); snake.move(); /* console.log(snake.cont); */ }, /* 判断是否为开始 */ startFn: function () { if (!snake.isStart) { snake.move(); snake.btns[0].innerHTML = '暂停'; snake.isStart = true; } else { snake.stop(); snake.btns[0].innerHTML = '开始'; snake.isStart = false; } }, /* 开始移动，核心模块 */ move: function () { document.onkeydown = snake.controlFn; var itemsAll = snake.cont.children; /* console.log(itemsAll); console.log(itemsAll,itemsAll[0].nodeName); */ /* 存储蛇身每一节的数组 */ var items = []; var span; /* var items = Array.from(itemsAll).filter(function (v, k) { return v.nodeName === 'DIV' }); */ /* console.log(items); */ /* 过滤筛选div(蛇身)与span(食物) */ for (var j = 0; j < itemsAll.length; j++) { if (itemsAll[j].nodeName == 'DIV') { items.push(itemsAll[j]) } else { span = itemsAll[j] } } /* 获取蛇头的位置 */ var l = snake.head.l; var t = snake.head.t; console.log(l, t); console.log(items) clearInterval(snake.timer) /* 键盘监听 */ document.onkeydown = snake.controlFn /* 开始移动 */ snake.timer = setInterval(function () { /* 记录蛇尾位置，并更新至存放蛇尾对象的身上 */ snake.ender.l = items[items.length - 1].style.left; snake.ender.t = items[items.length - 1].style.top; /* 更新蛇身位置 */ for (var i = items.length - 1; i > 0; i--) { items[i].style.left = items[i - 1].style.left; items[i].style.top = items[i - 1].style.top; } /* 判断蛇头的方向并更新其位置 */ if (snake.dir == 'l') { l -= snake.speed; } if (snake.dir == 'r') { l += snake.speed; } if (snake.dir == 't') { t -= snake.speed; } if (snake.dir == 'b') { t += snake.speed; } /* 出边界y */ if (l < 0 || l > 490 || t < 0 || t > 490) { clearInterval(snake.timer) snake.reStart(confirm('蛇皮怪你撞墙了！！是否重新来过？')) } items[0].style.left = l + 'px'; items[0].style.top = t + 'px'; /* 更新记录蛇头的对象 */ snake.head.l = l snake.head.t = t /* console.log(items[0].style); */ /* 插入蛇头 */ snake.cont.appendChild(items[0]) for (var k = 1; k < items.length; k++) { /* 判断蛇头是否咬到了自己 */ if (items[0].style.left == items[k].style.left && items[0].style.top == items[k] .style.top) { snake.reStart(confirm('蛇皮怪你咬死自己了，是否重新来过？')) /* console.log(items[0].style.left,items[0].style.top); console.log(items[0].style.left,items[0].style.top); */ clearInterval(snake.timer) /* alert('Game Over!'); window.location.reload(true) */ return } /* 插入蛇身 */ snake.cont.appendChild(items[k]) } /* 吃到了食物 */ console.log(span.style.left, span.style.top); /* console.log(l, '吃到了食物'); */ if (l == parseInt(span.style.left) && t == parseInt(span.style.top)) { snake.eat() } }, parseInt(300 / snake.status)) }, eat() { snake.createSnake() snake.getfood() snake.counter++; snake.score.innerHTML = `${snake.counter*100}分` }, /* 游戏结束判断是否重新开始 */ reStart: function (value) { if (value) { window.location.reload(true) } }, /* 生产食物 */ getfood: function () { if (document.querySelector('span')) { console.log('进来了'); document.querySelector('span').remove(); } var span = document.createElement('span'); var l = snake.randM(0, 49) * 10 var t = snake.randM(0, 49) * 10 console.log('得到食物', l, t); span.style.left = l + 'px'; span.style.top = t + 'px'; snake.cont.appendChild(span); if (snake.isStart) { snake.move() } }, /* 产生随机数 */ getTime() { let time,h,m,s setInterval(function () { time = new Date() h = time.getHours() m = time.getMinutes(); s = time.getSeconds(); if (h < 10) { h = '0' + h } if (m < 10) { m = '0' + m } if (s < 10) { s = '0' + s } snake.time.innerHTML = `${h}: ${m}: ${s}` }, 1000) }, randM: function (min, max) { return Math.round(Math.random() * (max - min) + min) }, /* 暂停 */ stop: function () { clearInterval(snake.timer) }, /* 简单模式 */ simpleFn: function () { snake.status = 1; snake.btnFn() snake.btns[1].className = 'active' }, /* 复杂模式 */ difcultFn: function () { snake.status = 3; snake.btnFn() snake.btns[2].className = 'active' }, /* 地狱模式 */ hardFn: function () { snake.status = 5; snake.btnFn() snake.btns[3].className = 'active' }, btnFn: function () { snake.btns.forEach(function (v, k) { v.className = '' }); if (snake.isStart) { snake.move(); } }, /* 按键操作蛇的移动 */ controlFn: function (el) { var el = el || window.event; var code = el.keycode || el.which; console.log(code); if ((code == 40 || code == 83)&&snake.dir !='t') { snake.dir = 'b' } if ((code == 39 || code == 68)&&snake.dir !='l') { snake.dir = 'r' } if ((code == 38 || code == 87)&&snake.dir !='b') { snake.dir = 't' } if ((code == 37 || code == 65)&&snake.dir !='r') { snake.dir = 'l' } } } snake.init(); </script> </body> </html>以上就是使用js怎么实现简单贪吃蛇小游戏，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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