<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>抽獎</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">
開始抽獎
</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！再試一次！</div>
</div>
</body>
<script src="./index.js"></script>
</html>
// 封裝工具函數
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');
// 存放每一個獎項的下標
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 = () => {
// 先給所有的獎項盒子加蒙層
for (let j = 0; j < arr.length; j++) {
covers[arr[j]].style.background = 'rgba(0, 0, 0, 0.3)';
}
// 將當前獎項的遮罩層去除
covers[arr[i]].style.background = 'none';
i++;
if (i === arr.length) {
i = 0;
}
// 通過count調整旋轉速度
count++;
// 根據count 重新調整計時器速度
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);
}
// 固定抽中某個獎項
// if (count === 40) {
// clearInterval(stopTimer);
// count = 0;
// rand = 0;
// setTimeout(() => {
// modalInner.innerText = '親！恭喜你中獎大寶SOD蜜一瓶！^_^ 😄';
// modal.style.display = 'block'
// mask.style.display = 'block'
// }, 500);
// }
// 當等于上面的隨機數時
if (count === rand) {
clearInterval(stopTimer);
}
// 點擊再試一次
tryBtn.addEventListener('click', () => {
modal.style.display = 'none'
mask.style.display = 'none'
})
}
// 給開始按鈕綁定點擊事件 點擊后執行 rotate
const start = () => {
console.log(count)
clearInterval(stopTimer);
stopTimer = setInterval(rotate, 300);
}
covers[4].addEventListener("click", start);
到此這篇關于html5實現九宮格抽獎可固定抽中某項獎品的文章就介紹到這了,更多相關html5九宮格抽獎內容請搜索腳本之家以前的文章或繼續瀏覽下面的相關文章，希望大家以后多多支持腳本之家！
