动态的进度条

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Title</title>
    <style>
        .progress {
            position:relative;
            width: 50%;
            height: 10px;
            background-image: linear-gradient(to right, #88d3ce 0%, #6e45e2 100%);
        }
        .progress::before {
            content: "";
            opacity: 0;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            border-radius: 10px;
            -webkit-animation: ivu-progress-active 2s ease-in-out infinite;
            animation: ivu-progress-active 2s ease-in-out infinite;
            height: 10px;
        }
        @keyframes ivu-progress-active {
            0% {
                opacity: .3;
                width: 0;
            }
            100% {
                opacity: 0;
                width: 100%;
            }
        }
    </style>
</head>
<body>
    <div style="padding: 50px;">
      <div class="progress"></div>
    </div>
</body>
</html>
图片.png
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