随机抽奖 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<button>点击抽奖</button>
</body>
</html>
<script>
    let  btn=document.getElementsByTagName('button')[0]
    let num=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,23,24,25,26,27,28,29,30]

        btn.onclick=function () {
            let a = parseInt(Math.random() * num.length)
            console.log(num[a])
            num.splice(a, 1)
        }
</script>
posted @ 2022-06-13 11:05  |oxo  阅读(29)  评论(0)  编辑  收藏  举报