原生js實現簡單貪吃蛇小游戲
本文實例為大家分享了js實現貪吃蛇小游戲的具體代碼，供大家參考，具體內容如下
先上圖
話不多說，代碼奉上，喜歡的請留下你的小星星♥(ˆ◡ˆԅ)
<!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'>分數:</br><p>0分</p><hr>時間：<p class='time'></p> </div></div><div class='btn'> <button>開始</button> <button class='active'>普通</button> <button>困難</button> <button>地獄</button></div> </div> <script>var snake = { /* 初始化全局屬于，已經添加初始事件監聽 */ init: function () {this.btns = document.querySelectorAll(’button’);this.score = document.querySelector(’p’);this.cont = document.querySelector(’.cont’);//時間顯示的容器this.time = document.querySelector(’.time’);//蛇的方向，’r’表示向右this.dir = ’r’; /* 定時器 */this.timer = ’’;/* 初始蛇頭位置 */this.head = { l: 30, t: 10}//蛇尾this.ender = { l: ’’, t: ’’};this.foodItem = { l: ’’, t: ’’};//為開始的狀態this.isStart = false;/* 計分器 */this.counter = 0;//簡單status為1，困難為2，地獄為3this.status = 1;this.speed = 10this.btns[0].onclick = this.startFn //開始或者暫停this.btns[1].onclick = this.simpleFn //簡單模式監聽this.btns[2].onclick = this.difcultFn //困難模式監聽this.btns[3].onclick = this.hardFn //地獄模式監聽this.initCreate();this.getTime()//隨機一個食物this.getfood() }, initCreate() {//創建一個初始蛇頭和蛇身3塊 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);} }, /* 增加蛇身一節 */ 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); */ }, /* 判斷是否為開始 */ startFn: function () {if (!snake.isStart) { snake.move(); snake.btns[0].innerHTML = ’暫停’; snake.isStart = true;} else { snake.stop(); snake.btns[0].innerHTML = ’開始’; snake.isStart = false;} }, /* 開始移動，核心模塊 */ move: function () {document.onkeydown = snake.controlFn;var itemsAll = snake.cont.children;/* console.log(itemsAll);console.log(itemsAll,itemsAll[0].nodeName); *//* 存儲蛇身每一節的數組 */var items = [];var span;/* var items = Array.from(itemsAll).filter(function (v, k) { return v.nodeName === ’DIV’}); *//* console.log(items); *//* 過濾篩選div(蛇身)與span(食物) */for (var j = 0; j < itemsAll.length; j++) { if (itemsAll[j].nodeName == ’DIV’) {items.push(itemsAll[j]) } else {span = itemsAll[j] }}/* 獲取蛇頭的位置 */var l = snake.head.l;var t = snake.head.t;console.log(l, t);console.log(items)clearInterval(snake.timer)/* 鍵盤監聽 */document.onkeydown = snake.controlFn/* 開始移動 */snake.timer = setInterval(function () { /* 記錄蛇尾位置，并更新至存放蛇尾對象的身上 */ 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; } /* 判斷蛇頭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; } /* 出邊界y */ if (l < 0 || l > 490 || t < 0 || t > 490) {clearInterval(snake.timer)snake.reStart(confirm(’蛇皮怪你撞墻了！！是否重新來過？’)) } items[0].style.left = l + ’px’; items[0].style.top = t + ’px’; /* 更新記錄蛇頭的對象 */ snake.head.l = l snake.head.t = t /* console.log(items[0].style); */ /* 插入蛇頭 */ snake.cont.appendChild(items[0]) for (var k = 1; k < items.length; k++) {/* 判斷蛇頭是否咬到了自己 */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，是否重新來過？’)) /* 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 = `${snake.counter*100}分` }, /* 游戲結束判斷是否重新開始 */ reStart: function (value) {if (value) { window.location.reload(true)} }, /* 生產食物 */ getfood: function () {if (document.querySelector(’span’)) { console.log(’進來了’); document.querySelector(’span’).remove();} var span = document.createElement(’span’);var l = snake.randM(0, 49) * 10var t = snake.randM(0, 49) * 10console.log(’得到食物’, l, t); span.style.left = l + ’px’;span.style.top = t + ’px’; snake.cont.appendChild(span);if (snake.isStart) { snake.move()} }, /* 產生隨機數 */ getTime() {let time,h,m,ssetInterval(function () { time = new Date() h = time.getHours() m = time.getMinutes(); s = time.getSeconds(); if (h < 10) { h = ’0’ + h } if (m < 10) { m = ’0’ + m } if (s < 10) { s = ’0’ + s } snake.time.innerHTML = `${h}: ${m}: ${s}`}, 1000) }, randM: function (min, max) {return Math.round(Math.random() * (max - min) + min) }, /* 暫停 */ stop: function () {clearInterval(snake.timer) }, /* 簡單模式 */ simpleFn: function () {snake.status = 1;snake.btnFn()snake.btns[1].className = ’active’ }, /* 復雜模式 */ difcultFn: function () {snake.status = 3;snake.btnFn()snake.btns[2].className = ’active’ }, /* 地獄模式 */ 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();} }, /* 按鍵操作蛇的移動 */ 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>
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。
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