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rotatingBoard.html
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rotatingBoard.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.wrap {
position: relative;
width: 400px;
height: 400px;
/* margin: 20% auto; */
}
.panel {
position: absolute;
width: 100%;
height: 100%;
background-color: cadetblue;
border-radius: 50%;
}
.panel-body {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.panel-body>div {
position: absolute;
top: -155px;
left: -29px;
width: 60px;
transform-origin: bottom;
background: antiquewhite;
height: 155px;
text-align: center;
}
.panel-body>div:nth-child(1) {
transform: rotate(30deg);
}
.panel-body>div:nth-child(2) {
transform: rotate(90deg);
}
.panel-body>div:nth-child(3) {
transform: rotate(150deg);
}
.panel-body>div:nth-child(4) {
transform: rotate(210deg);
}
.panel-body>div:nth-child(5) {
transform: rotate(270deg);
}
.panel-body>div:nth-child(6) {
transform: rotate(330deg);
}
.transition {
transition: all 1s;
}
.pointer {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 80px;
height: 80px;
border-radius: 50%;
background-color: beige;
text-align: center;
line-height: 80px;
cursor: pointer;
user-select: none;
}
.pointer::before {
content: "";
display: block;
position: absolute;
background-color: red;
width: 2px;
height: 50px;
top: -50px;
left: 50%;
transform: translateX(-50%);
}
</style>
<link rel="stylesheet" href="./css/test.css">
</head>
<body>
<div>当前主题：<span id="theme-name">./css/test.css</span></div>
<button id="switchBtn">更换主题</button>
<button id="deleteBtn">删除主题</button>
<div>
<ol>
<li>1元大礼</li>
<li>5元大礼</li>
<li>未中奖</li>
<li>7元大礼</li>
<li>未中奖</li>
<li>9999元大礼</li>
</ol>
<div>结果：<span id="result"></span></div>
</div>
<div class="wrap">
<div class="panel">
<div class="panel-body">
<div class="item-1">1</div>
<div class="item-2">2</div>
<div class="item-3">3</div>
<div class="item-4">4</div>
<div class="item-5">5</div>
<div class="item-6">6</div>
</div>
</div>
<div class="pointer">抽奖</div>
</div>
<script>
const awardList = {
'6': {
name: '9999元现金券',
level: 1,
probability: 0.001
},
'5': {
name: '很遗憾，未中奖！',
level: 5,
probability: 0.3
},
'4': {
name: '恭喜获得7元现金券！',
level: 2,
probability: 0.05
},
'3': {
name: '很遗憾，未中奖！',
level: 5,
probability: 0.3
},
'2': {
name: '恭喜获得5元优惠券！',
level: 3,
probability: 0.149
},
'1': {
name: '恭喜获得1元现金！',
level: 4,
probability: 0.2
}
}
// const awardList = {
// '6': {
// name: '9999元现金券',
// level: 1,
// probability: 0.5
// },
// '5': {
// name: '很遗憾，未中奖！',
// level: 5,
// probability: 0.1
// },
// '4': {
// name: '恭喜获得7元现金券！',
// level: 2,
// probability: 0.1
// },
// '3': {
// name: '很遗憾，未中奖！',
// level: 5,
// probability: 0.1
// },
// '2': {
// name: '恭喜获得5元优惠券！',
// level: 3,
// probability: 0.1
// },
// '1': {
// name: '恭喜获得1元现金！',
// level: 4,
// probability: 0.1
// }
// }
let deg = 0
let cat = 60
let isRotating = false
const juger = getRangeJudger()
const themeName = localStorage.getItem('theme-name')
const pointer = document.querySelector('.pointer')
const panel = document.querySelector('.panel')
const result = document.querySelector('#result')
pointer.addEventListener('click', function (e) {
if (!isRotating) {
isRotating = true
panel.classList.remove('transition')
panel.style.transform = `rotate(0deg)`
setTimeout(function () {
panel.classList.add('transition')
pointer.innerHTML = '旋转中'
deg = juger(Math.floor(Math.random() * 1000))
panel.style.transform = `rotate(${deg + (360 * 10)}deg)`
setTimeout(() => {
isRotating = false
pointer.innerHTML = '抽奖'
result.innerText = getAward(deg)
}, 1000)
}, 50)
}
})
function getAward(deg) {
deg = Math.abs(deg)
let msg = ''
if (deg <= 60) {
msg = '恭喜获得1元现金！'
} else if (deg <= 120) {
msg = '恭喜获得5元优惠券！'
} else if (deg <= 180) {
msg = '很遗憾，未中奖！'
} else if (deg <= 240) {
msg = '恭喜获得7元现金券！'
} else if (deg <= 300) {
msg = '很遗憾，未中奖！'
} else if (deg <= 360) {
msg = '恭喜获得9999元现金券！'
}
return msg
}
const switchBtn = document.querySelector('#switchBtn')
switchBtn.addEventListener('click', function () {
const link = document.getElementById('theme')
if (!link) loadStyleLink('./css/test2.css')
})
const deleteBtn = document.querySelector('#deleteBtn')
deleteBtn.addEventListener('click', function () {
removeLink('theme')
})
if (themeName) loadStyleLink(themeName)
function removeLink(id) {
const link = document.getElementById(id)
if (link) {
document.body.removeChild(link)
localStorage.removeItem('theme-name')
let label = document.querySelector('#theme-name')
label.innerText = './css/test.css'
}
}
function loadStyleLink(herf) {
const link = document.createElement('link')
link.id = 'theme'
link.rel = 'stylesheet'
link.href = herf
document.body.append(link)
localStorage.setItem('theme-name', herf)
let label = document.querySelector('#theme-name')
label.innerText = herf
}
function getRangeJudger() {
let max = 1000
let count = 0
let rangeMap = {}
let keys = Object.keys(awardList)
for (let key of keys.reverse()) {
const a = awardList[key]
count = max * a.probability + count
rangeMap[count] = key
}
return function juger(range) {
let index = -1
for (let k in rangeMap) {
const value = Number(k)
if (range <= value) {
index = Number(rangeMap[k])
break
}
}
const deg = index * 60
const result = Math.floor(Math.random() * (60) + (deg - 60))
console.log(index, awardList[index].name)
return -result
}
}
</script>
</body>
</html>