大概的效果就是，当访客访问你的博客时，页面会首先显示一张全屏大图，然后再逐渐显示网页内容。
代码是通过CSS3动画控制的效果，所以很轻量，但是兼容浏览器没有JS的全面。

食用方法

  1. header内添加CSS（不要放入css文件内）
<style>
.loading{opacity:0;background:#fff url(https://yun.342600.xyz/cover.jpg);
background-position:center center;
-webkit-background-size:cover;
-moz-background-size:cover;
-o-background-size:cover;
background-size:cover;position:fixed;width:100%;top:0;bottom:0;animation:Loading 2s;line-height:100vh;text-align:center;font-size:30px;color:#ccc;}
@keyframes Loading
{
0% {opacity:1;color:#C1FF50;z-index:999999;}
20% {opacity:1;color:#5CB8FF;}
40% {opacity:1;color:#FFD350;}
60% {opacity:1;color:#FF5950;}
80% {opacity:.5;color:#fff;}
100% {opacity:0;}
}
</style>
  1. DIV引用
<div class="loading">Loading...</div>
  1. 整体代码参考
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>TEST</title>
<style>
.loading{opacity:0;background:#fff url(https://yun.342600.xyz/cover.jpg);
background-position:center center;
-webkit-background-size:cover;
-moz-background-size:cover;
-o-background-size:cover;
background-size:cover;position:fixed;width:100%;top:0;bottom:0;animation:Loading 2s;line-height:100vh;text-align:center;font-size:30px;color:#ccc;}
@keyframes Loading
{
0% {opacity:1;color:#C1FF50;z-index:999999;}
20% {opacity:1;color:#5CB8FF;}
40% {opacity:1;color:#FFD350;}
60% {opacity:1;color:#FF5950;}
80% {opacity:.5;color:#fff;}
100% {opacity:0;}
}
</style>
</head>
<body>
<div class="loading">Loading...</div>
</body>
</html>

2021年3月16日19:59:46 添加新CSS


    .loading{opacity:0;background:#fff url(https://ty.342600.xyz/usr/themes/Jshb/images/icons/preloader.svg);
    background-repeat:no-repeat;
background-position:center center;
-webkit-background-size:cover;
-moz-background-size:cover;
-o-background-size:cover;
background-size:cover;position:fixed;width:100%;top:0;bottom:0;animation:Loading 3s;line-height:100vh;text-align:center;font-size:30px;color:#ccc;}
@keyframes Loading
{
0% {opacity:1;color:#C1FF50;z-index:999999;}
20% {opacity:1;color:#5CB8FF;}
40% {opacity:1;color:#FFD350;}
60% {opacity:1;color:#FF5950;}
80% {opacity:.5;color:#fff;}
100% {opacity:0;}
}