代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>幸运大转盘</title>
<style>
* { /* 重置默认样式 */
margin: 0;
padding: 0;
border: none;
outline: none;
user-select: none;
}
.wrapper {
position: relative;
height: 200px;
width: 200px;
padding: 20px;
margin: 20px;
background-color: #ff5555;
box-shadow: #000000 0px 0px 10px;
border-radius: 50%;
}
.light {
position: absolute;
height: 10px;
width: 10px;
border-radius: 50%;
top: 5px;
left: 115px;
transform-origin: 5px 115px;
}
.light-twinkling {
animation: 1s twinkling 3, 100ms 3s twinkling 3;
}
.light:nth-child(2n) {
background-color: #fafce7;
}
.light:nth-child(2n+1) {
background-color: #ffe58b;
}
.light:nth-child(2) {
transform: rotate(36deg);
}
.light:nth-child(3) {
transform: rotate(72deg);
}
.light:nth-child(4) {
transform: rotate(108deg);
}
.light:nth-child(5) {
transform: rotate(144deg);
}
.light:nth-child(6) {
transform: rotate(180deg);
}
.light:nth-child(7) {
transform: rotate(216deg);
}
.light:nth-child(8) {
transform: rotate(252deg);
}
.light:nth-child(9) {
transform: rotate(288deg);
}
.light:nth-child(10) {
transform: rotate(324deg);
}
.panel {
position: relative;
height: 200px;
width: 200px;
background-color: #b7b7b7;
border-radius: 100px;
}
.sector {
position: absolute;
left: 100px;
top: 0px;
width: 100px;
height: 200px;
font-size: 14px;
border-radius: 0px 100px 100px 0;
overflow: hidden;
transform-origin: left center;
}
.sector:nth-child(1) {
transform: rotate(-18deg);
}
.sector:nth-child(2) {
transform: rotate(18deg);
}
.sector:nth-child(3) {
transform: rotate(54deg);
}
.sector:nth-child(4) {
transform: rotate(90deg);
}
.sector:nth-child(5) {
transform: rotate(126deg);
}
.sector:nth-child(6) {
transform: rotate(162deg);
}
.sector:nth-child(7) {
transform: rotate(198deg);
}
.sector:nth-child(8) {
transform: rotate(234deg);
}
.sector:nth-child(9) {
transform: rotate(270deg);
}
.sector:nth-child(10) {
transform: rotate(306deg);
}
.sector:nth-child(2n+1) .sector-inner {
background: #fef6e0;
}
.sector:nth-child(2n) .sector-inner {
background: #ffffff;
}
.sector-inner {
text-align: center;
display: block;
width: 40px;
padding: 5px 3px 0 57px;
height: 195px;
transform: translateX(-100px) rotate(36deg);
transform-origin: right center;
border-radius: 100px 0 0 100px;
}
.sector-inner span {
display: block;
transform-origin: center;
transform: rotate(-19deg);
color: #d46854;
}
.pointer {
position: absolute;
left: 79px;
top: 79px;
z-index: 10;
height: 30px;
width: 30px;
padding: 6px;
color: #fff899;
line-height: 15px;
font-size: 12px;
text-align: center;
background-color: #ff5350;
border-radius: 50%;
border: 1px solid #ff5350;
transition: transform 3s cubic-bezier(.2,.93,.43,1);
}
.pointer::after {
content: '';
position: absolute;
left: 14px;
top: -24px;
border-width: 12px 6px;
border-style: solid;
border-color: transparent;
border-bottom-color: #ff5350;
transform-origin: center;
}
.result {
margin: 20px 60px;
}
@keyframes twinkling {
50% { background: transparent; }
}
</style>
</head>
<body>
<div class="wrapper">
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="light"></div>
<div class="panel">
<div class="sector">
<div class="sector-inner">
<span>谢谢参与</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span> 5 0 积分</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>谢谢参与</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>100元话费</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span> 5 0 积分</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>谢谢参与</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>100元话费</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>谢谢参与</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span> 5 0 积分</span>
</div>
</div>
<div class="sector">
<div class="sector-inner">
<span>10元话费</span>
</div>
</div>
<div class="pointer">开始抽奖</div>
</div>
</div>
<div class="result"></div>
<script>
let getEle = document.getElementsByClassName.bind(document);
let pointer = getEle('pointer')[0];
let result = getEle('result')[0];
let lights = Array.prototype.slice.call(getEle('light'));
let onRotation = false; // 记录当前是否正在旋转，如果正在旋转，就不能继续点击了
let reward = ['谢谢参与', '50积分', '谢谢参与', '100元话费', '50积分',
'谢谢参与', '100元话费', '谢谢参与', '50积分', '10元话费'];
// 根据随机角度获取奖励
let getReward = (function() {
currentDeg = 0;
return function() {
// 转三圈到四圈
let rotateDeg = Math.random() * 360 + 1080;
currentDeg += rotateDeg;
let rewardText = reward[Math.floor((currentDeg + 18) % 360 / 36)]
return {
deg: currentDeg,
text: rewardText === '谢谢参与' ? '很遗憾，您没有获得奖品。' : '恭喜获得: ' + rewardText
}
}
})();
pointer.addEventListener('click', () => {
if (onRotation) return;
console.log('开始抽奖');
onRotation = true;
lights.forEach(light => { light.className += ' light-twinkling'; });
let nextStatus = getReward();
console.log(nextStatus)
result.innerText = nextStatus.text;
result.style.display = 'none';
pointer.style.transform = `rotateZ(${nextStatus.deg}deg)`;
})
pointer.addEventListener('transitionend', () => {
console.log('抽奖结束');
setTimeout(() => { // 等闪烁三下结束
onRotation = false;
lights.forEach(light => { light.className = 'light'; });
result.style.display = 'block';
}, 300);
})
</script>
</body>
</html>
来源：https://www.cnblogs.com/wenruo/p/9732704.html
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