vue客戶端渲染，是在瀏覽器端通過模板生成html，插入到根節點
中剛打開頁面，在js文件加載過程中，和js代碼執行過程中，頁面中沒有顯示的內容。
可以在這個時候顯示一個loading。用戶體驗會好些
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>demo</title>
<style>
#loader-wrapper { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 999999; }
#loader {
display: block; position: relative; left: 50%; top: 40%; z-index: 1001; width: 90px; height: 90px; margin: -45px 0 0 -45px; border-radius: 50%; border: 3px solid transparent;border-top-color: #fe9501;
-webkit-animation: spin 2s linear infinite;
-ms-animation: spin 2s linear infinite;
-moz-animation: spin 2s linear infinite;
-o-animation: spin 2s linear infinite;
animation: spin 2s linear infinite;
}
#loader:before {
content: ""; position: absolute; top: 5px; left: 5px; right: 5px; bottom: 5px; border-radius: 50%; border: 3px solid transparent; border-top-color: #fe9501;
-webkit-animation: spin 3s linear infinite;
-moz-animation: spin 3s linear infinite;
-o-animation: spin 3s linear infinite;
-ms-animation: spin 3s linear infinite;
animation: spin 3s linear infinite;
}
#loader:after {
content: ""; position: absolute; top: 15px; left: 15px; right: 15px; bottom: 15px; border-radius: 50%; border: 3px solid transparent; border-top-color: #fe9501;
-moz-animation: spin 1.5s linear infinite;
-o-animation: spin 1.5s linear infinite;
-ms-animation: spin 1.5s linear infinite;
-webkit-animation: spin 1.5s linear infinite;
animation: spin 1.5s linear infinite;
}
@-webkit-keyframes spin {
0% { -webkit-transform: rotate(0deg); -ms-transform: rotate(0deg); transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); -ms-transform: rotate(360deg); transform: rotate(360deg); }
}
@keyframes spin {
0% { -webkit-transform: rotate(0deg); -ms-transform: rotate(0deg); transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); -ms-transform: rotate(360deg); transform: rotate(360deg); }
}
</style>
</head>
<body>
<noscript>
<strong>We're sorry but yearlybill doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
</noscript>
<div id="app">
<div id="loader-wrapper">
<div id="loader"></div>
</div>
</div>
<!-- built files will be auto injected -->
</body>
</html>