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本案例是一个动画效果

思路

1.写好7个对应的条状盒子（flex布局）
2.设置animate动画（阴影、缩放、平移）
3.设置动画延迟产生波浪效果

代码

html

  1. <!DOCTYPE html>
  2. <html lang="zh-CN">
  4. <head>
  5.     <meta charset="UTF-8">
  6.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  7.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  8.     <title>box shadow加载动画</title>
  9.     <link rel="stylesheet" href="style.css">
  10. </head>
  12. <body>
  13.     <div class="loader">
  14.         <span></span>
  15.         <span></span>
  16.         <span></span>
  17.         <span></span>
  18.         <span></span>
  19.         <span></span>
  20.         <span></span>
  21.         <span></span>
  22.     </div>
  23. </body>
  25. </html>

css

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #2196f3;
}
.loader {
    position: relative;
    display: flex;
}
.loader span {
    width: 50px;
    height: 300px;
    margin: 0 20px;
    background-color: #2196f3; 
    animation: animate 1.4s linear infinite;
}
.loader span:nth-child(1) {
    animation-delay: 0s;
}
.loader span:nth-child(2) {
    animation-delay: 0.2s;
}
.loader span:nth-child(3) {
    animation-delay: 0.4s;
}
.loader span:nth-child(4) {
    animation-delay: 0.6s;
}
.loader span:nth-child(5) {
    animation-delay: 0.8s;
}
.loader span:nth-child(6) {
    animation-delay: 1s;
}
.loader span:nth-child(7) {
    animation-delay: 1.2s;
}
@keyframes animate {
    0% {
        box-shadow: 0 0 0 rgba(0, 0, 0, .5);
        opacity: 0;
        transform: translateX(-50px) scale(1);
    }
    50% {
        box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
        opacity: 1;
        transform: translateX(0) scale(1.2);
    }
    100% {
        box-shadow: 0 0 0 rgba(0, 0, 0, .5);
        opacity: 0;
        transform: translateX(50px) scale(1);
    }
}

需要掌握的知识

css

animation
transform
box-shadow