-/随机点名系统.html at master · lrf1021/- · GitHub

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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>
        .box {
            width: 200px;
            height: 200px;
            margin: 100px auto;
            margin-bottom: 0px;
            text-align: center;
            line-height: 200px;
            background-color: rgb(113, 97, 97);
            border: 10px solid orange;
            border-radius: 50%;
            font-size: 38px;
            color: #fff;
            box-shadow: 2px 2px 40px skyblue;
        }

        button {
            width: 150px;
            height: 60px;
            display: block;
            margin: 20px auto;
            border-radius: 30%;
            color: orange;
            font-size: 25px;
        }

        .father {
            width: 400px;
            height: 600px;
            margin: 0 auto;
            border-radius: 20px;
            border: 6px solid olive;
            background: url(./images/bg.jpg);
        }

        h3 {
            color: #fff;
            text-align: center;
            font-size: 40px;
        }
    </style>
</head>

<body>
    <div class="father">
        <h3>点名系统</h3>
        <div class="box">
            start
        </div>
        <button>stop</button>
    </div>
    <script>
        let btn = document.querySelector('button');
        let arr = ['张航辉', '李瑞峰', '嫣明娇', '吕旭杨', '陈范范', '杨雨晴', '商浩楠', '刘珂', '任玉康', '冀书悦', '王松森', '郭冰倩', '孙严鹏', '周家举', '陶晓丽', '王宏钦', '朱豪', '宋龙辉'];
        let box = document.querySelector('.box');
        let timer1;
        box.addEventListener('click', function() {
            clearInterval(timer1);
            timer1 = setInterval(function() {
                let ran = parseInt(Math.random() * (arr.length));
                box.innerHTML = arr[ran];
            }, 200)
        })
        btn.addEventListener('click', function() {
            box.style.fontSize = '60px'
            box.style.color = 'orange';
            clearInterval(timer1);
            timer1 = setInterval(function() {
                let ran = parseInt(Math.random() * (arr.length));
                box.innerHTML = arr[ran];
            }, 600)
            setTimeout(function() {
                clearInterval(timer1)
            }, 2500)
        })
    </script>
</body>

</html>