原生js写的一个九宫格抽奖程序 （周末在家闲着也是闲着）
我写的这个抽奖是拿来整蛊我女朋友， 因为每次抽奖的结果都是同一个。。
哈哈哈哈哈哈哈哈哈哈哈哈哈
我会附上正常抽奖的的代码和固定只能抽到某一个的代码；
HTML代码如下 ⤵️
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>抽奖</title> <style> * { padding: 0; margin: 0; box-sizing: border-box; } html, body, .modal-cover { width: 100%; height: 100%; } body { background: url(./img/background.jpg) no-repeat center; background-size: 100% 100%; overflow: hidden; } .container { width: 90%; height: 300px; /* width: 831px; */ height: 336px; /* border: 1px solid; */ display: flex; flex-wrap: wrap; margin: 100px auto; border-radius: 6px; background: #fff; padding: 5px 0 5px 10px; } .item { width: 30%; height: 30%; /* outline: 1px solid black; */ display: flex; justify-content: center; align-items: center; font-size: 18; border-radius: 2px; /* border: 1px solid; */ margin: 4px; box-shadow: 1px 1px 14px #ccc; position: relative; } .cover { position: absolute; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.3); top: 0; left: 0; border-radius: 2px; } .item-box { width: 100%; height: 100%; background-size: 100% 100%; background-repeat: no-repeat; } .btn-box { background-color: #faa5b6; cursor: pointer; color: #fff; font-size: 14px; text-align: center; line-height: 100px; } .modal { width: 80%; height: 150px; position: fixed; top: 50%; left: 50%; background: rgba(255, 255, 255, 255); border-radius: 4px; transform: translate(-50%, -50%); text-align: center; padding: 20px 10px 10px; z-index: 2; } .modal .confirm-btn { background: pink; width: 170px; height: 40px; color: #fff; text-align: center; line-height: 40px; margin: 0 auto; margin-top: 20px; cursor: pointer; border-radius: 4px; } .modal-cover { position: fixed; top: 0; left: 0; background: rgba(0, 0, 0, 0.3); z-index: 1; display: none; } </style></head><body> <div class="container"> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="btn-box item"> <div class="cover" style="background: none;"></div> <div class="item-box"> 开始抽奖 </div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> <div class="item"> <div class="cover"></div> <div class="item-box"></div> </div> </div> <div class="modal-cover"></div> <div class="modal" style="display: none;"> <span></span> <div class="confirm-btn">不信邪！再试一次！</div> </div></body><script src="./index.js"></script></html>js代码👇
// 封装工具函数const util = { getELe: (str) => { return document.querySelector(str) }, getELes: (str) => { return document.querySelectorAll(str) }}let items = util.getELes(".item-box"), covers = util.getELes(.cover), imgArr = [CHANEL, Dior, givenchy, dabao, empty, lamer, lancome, yashilandai, YSL, ]for (let i = 0; i < items.length; i++) { if (imgArr[i] === empty) continue; let el = items[i]; el.style.backgroundImage = `url(./img/${imgArr[i]}.png)`}let modal = util.getELe(.modal), mask = util.getELe(.modal-cover), modalInner = util.getELe(.modal span);let tryBtn = util.getELe(.confirm-btn);// 存放每一个奖项的下标let arr = [0, 1, 2, 5, 8, 7, 6, 3], i = 0, count = 0, stopTimer;let rand = Math.floor(Math.random() * 8 + 50);const rotate = () => { // 先给所有的奖项盒子加蒙层 for (let j = 0; j < arr.length; j++) { covers[arr[j]].style.background = rgba(0, 0, 0, 0.3); } // 将当前奖项的遮罩层去除 covers[arr[i]].style.background = none; i++; if (i === arr.length) { i = 0; } // 通过count调整旋转速度 count++; // 根据count 重新调整计时器速度 if (count === 5 || count === 45) { clearInterval(stopTimer); stopTimer = setInterval(rotate, 200); } if (count === 10 || count === 35) { clearInterval(stopTimer); stopTimer = setInterval(rotate, 100); } if (count === 15) { clearInterval(stopTimer); stopTimer = setInterval(rotate, 50); } // 固定抽中某个奖项 // if (count === 40) { // clearInterval(stopTimer); // count = 0; // rand = 0; // setTimeout(() => { // modalInner.innerText = 亲！恭喜你中奖大宝SOD蜜一瓶！^_^ 😄; // modal.style.display = block // mask.style.display = block // }, 500); // } // 当等于上面的随机数时 if (count === rand) { clearInterval(stopTimer); } // 点击再试一次 tryBtn.addEventListener(click, () => { modal.style.display = none mask.style.display = none })}// 给开始按钮绑定点击事件 点击后执行 rotate const start = () => { console.log(count) clearInterval(stopTimer); stopTimer = setInterval(rotate, 300);}covers[4].addEventListener("click", start);如果想设置固定抽中某个奖项，// if (count === 40) 这个count的值需要你自己去算一下，图片自己选几个。
代码copy可直接运行。
最终效果，有点丑。你们想玩的自己发挥下吧。
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