原生JS实现九宫格抽奖效果
时间：2023-03-10 10:46:15 | 栏目：JavaScript代码 | 点击：次
效果图：
代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<style>
*{margin:0;padding:0;}
#container{width:310px;height:310px;margin:30px auto;}
#ul1{width:310px;height:310px;list-style:none;}
#ul1 li,#ul1 a{width:100px;height:100px;border:1px solid #565656;float:left;text-align:center;line-height:100px;}
#ul1 a:hover{cursor:pointer;color:orange;font-size:18px;}
#ul1 .active{background:red;color:#fff;}
#pp{line-height:32px;color:#9a9a9a;text-align:center;}
</style>
</head>
<body>
<div id="container">
<ul id="ul1">
<li>一等奖</li>
<li>二等奖</li>
<li>三等奖</li>
<li>四等奖</li>
<a>开始</a>
<li>五等奖</li>
<li>六等奖</li>
<li>七等奖</li>
<li>八等奖</li>
</ul>
<p id="pp"></p>
</div>
<script>
var container = document.getElementById('container'),
li = container.getElementsByTagName('li'),
aa = container.getElementsByTagName('a')[0],
pp = document.getElementById('pp'),
timer = null;
function start(){
var i = 0;
var num = Math.floor(Math.random() * li.length) + 20;
if(i<num){
timer = setInterval(function(){
for(var j=0;j<li.length;j++){
li[j].className = '';
}
li[i%li.length].className = 'active';
i++;
if(i === num){
clearInterval(timer);
if(num%li.length === 0){
pp.innerHTML += "恭喜您中了：8 等奖" + '<br/>';
}else{
pp.innerHTML += "恭喜您中了："+ parseInt(num%li.length) + " 等奖"+ '<br/>';
}
}
},130);
}
}
aa.onclick = function(){
start();
}
</script>
</body>
</html>