防抖、防重复提交、loading

<!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>圆弧转动</title>
</head>
<style>
    :root {
        --color: orange;
        --lineColor: rgba(102, 163, 224, .2);
    }

    body {
        /* background: #222; */
        overflow: hidden;
    }

    section {
        position: relative;
        margin: 0 auto;
        width: 200px;
        height: 200px;
    }

    section::before {
        content: '';
        position: absolute;
        height: 10px;
        width: 10px;
        border-radius: 100%;
        border-top: 1px solid orange;
        top: 50%;
        left: 50%;
        margin-top: -5px;
        margin-left: -5px;
        animation: turn 1s infinite linear;
        filter:
            drop-shadow(0 0 2px var(--color)) drop-shadow(0 0 5px var(--color)) drop-shadow(0 0 10px var(--color)) drop-shadow(0 0 20px var(--color));
    }

    .box,
    .box::after,
    .box::before {
        border: 2px solid var(--lineColor);
        border-left: 2px solid var(--color);
        border-right: 2px solid var(--color);
        border-radius: 50%;
    }

    .box::after,
    .box::before {
        position: absolute;
        content: '';
        left: 50%;
        top: 50%;
    }

    .box {
        width: 200px;
        height: 200px;
        position: relative;
        animation: turn 1s linear infinite;
        transform-origin: 50% 50%;
    }

    .box::before {
        width: 180px;
        height: 180px;
        margin-top: -90px;
        margin-left: -90px;
        animation: turn2 1.25s linear infinite;
    }

    .box::after {
        width: 160px;
        height: 160px;
        margin-top: -80px;
        margin-left: -80px;
        animation: turn 1.5s linear infinite;
    }

    .box-circle,
    .box-circle1,
    .box-circle2 {
        border: 2px solid var(--color);
        opacity: .9;
        border-radius: 50%;
        position: absolute;
        left: 50%;
        top: 50%;
        transform-origin: 50% 50%;
        transform: translate(-50%, -50%);
        width: 100px;
        height: 100px;
        animation: rotate 3s linear infinite;
    }

    .box-circle {
        animation-delay: 0.2s;
    }

    .box-circle1 {
        animation-delay: 1.2s;
    }

    .box-circle2 {
        animation-delay: 2.2s;
    }

    @keyframes turn {
        100% {
            transform: rotateZ(-1turn);
        }
    }

    @keyframes turn2 {
        100% {
            transform: rotateZ(1turn);
        }
    }

    @keyframes rotate {
        100% {
            border: none;
            border-top: 2px solid var(--color);
            border-bottom: 2px solid var(--color);
            transform: translate(-50%, -50%) rotate3d(.5, 0.5, 0.5, -720deg);
        }
    }
</style>

<body>
    <div id="test" style="display: none;">
        <section>
            <div class="box"></div>
            <div class="box-circle"></div>
            <div class="box-circle1"></div>
            <div class="box-circle2"></div>
        </section>
    </div>
    <button onclick="test()">防止重复提交</button>
    <script>
        function test() {
            var test = document.getElementById("test");
            // 设置遮罩样式
            test.style.position = "fixed";
            test.style.top = "0";
            test.style.left = "0";
            test.style.width = "100%";
            test.style.height = "100%";
            test.style.backgroundColor = "rgba(34, 34, 34, 0.5)";

            // 显示蒙版
            test.style.display = "block";
            
            // 在1秒后隐藏蒙版
            setTimeout(function () {
                test.style.display = "none";
            }, 1000); // 1000毫秒 = 1秒
        };

    </script>
</body>

</html>