在使用乾坤微前端框架中，遇见图片资源路径存在访问问题，在不搭CDN的情况下，使用base64方式将图片资源打入代码。这样会导致包体积过大,加载时间长；
所以加了一个loading效果；
1.在index.html入口增加 loading；
<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<!-- <script type="text/javascript" src="./config.js"></script> -->
<title>
<%= htmlWebpackPlugin.options.title %>
</title>
</head>
<style media="screen" type="text/css">
/* #app-cockpit-loading { width: 100%; height: 100%; }
#app-cockpit-loading span {
position: absolute;
display: block;
font-size: 50px;
line-height: 50px;
top: 50%;
left: 50%;
width: 200px;
height: 100px;
-webkit-transform: translateY(-50%) translateX(-50%);
transform: translateY(-50%) translateX(-50%);
} */
#app-cockpit-loading {
width: 120px;
height: 40px;
position: absolute;
font-size: 50px;
line-height: 50px;
top: 50%;
left: 50%;
transform: translateY(-50%) translateX(-50%);
}
#app-cockpit-loading span {
display: inline-block;
width: 8px;
height: 100%;
border-radius: 4px;
background: lightgreen;
-webkit-animation: load 1s ease infinite;
}
@-webkit-keyframes load {
0%,
100% {
height: 40px;
background: lightgreen;
}
50% {
height: 70px;
margin: -15px 0;
background: lightblue;
}
}
#app-cockpit-loading span:nth-child(2) {
-webkit-animation-delay: 0.2s;
}
#app-cockpit-loading span:nth-child(3) {
-webkit-animation-delay: 0.4s;
}
#app-cockpit-loading span:nth-child(4) {
-webkit-animation-delay: 0.6s;
}
#app-cockpit-loading span:nth-child(5) {
-webkit-animation-delay: 0.8s;
}
</style>
<body>
<noscript>
<strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled.
Please enable it to continue.</strong>
</noscript>
<div id="app-cockpit-loading">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
</html>
2.在app.vue mounted（)中执行
document.getElementById('app-cockpit-loading').remove();
