h5项目中使用骨架屏占位，感觉网上的闪烁效果不好看，自己弄了一个，动画时长可自行根据dom大小调整
演示文件
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>骨架屏动画效果</title>
<style>
#grad1 {
height: 200px;
width: 400px;
animation: loading 8s linear infinite;
background-image: linear-gradient(50deg, #e8e7e7, #e8e7e7 52%, #f1f1f1 55%, #e8e7e7 58%, #e8e7e7);
background-size: 400% 100%;
}
@keyframes loading {
0% {
background-position: 400% 50%
}
to {
background-position: 0% 50%
}
}
</style>
</head>
<body>
<div id="grad1"></div>
</body>
</html>