‌网页顶部加载进度条，跟随网页加载完自动消失如图：代码如下css:.pace { -webkit-pointer-events:none; pointer-events:none; -webkit-user-select:none; -moz-user-select:none; user-select:none;}.pace-inactive { display:none;/*此段代码进度条跑完后隐藏*/}.pace .pace-progress { background:#ff0000;/*进度条颜色*/ position:fixed; z-index:2000; top:0; left:0;/*进度条开始位置*/ height:3px;/*进度条高度（宽度）*/ -webkit-t