功能：发送网络请求时等待加载的圈圈动态显示，网络请求成功后关闭提示圈圈
代码：
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css画动态等待转圈效果</title>
<link rel="stylesheet" href="public/index.css" rel="external nofollow" >
</head>
<style type="text/css">
.toast {
display: none;
position: fixed;
flex-direction: column;
justify-content: center;
align-items: center;
width: 18rem;
height: 18rem;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
background-color: #4A4A4B;
border-radius: 1rem;
color: #f0f0f0;
font-size: 2.5rem;
}
.load {
display: inline-block;
margin-bottom: 1.5rem;
height: 4rem;
width: 4rem;
border: 0.4rem solid transparent;
border-top-color: white;
border-left-color: white;
border-bottom-color: white;
animation: circle 1s infinite linear;
-webkit-animation: circle 1s infinite linear; /* Safari 和 Chrome */
border-radius: 50%
}
@-webkit-keyframes circle {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(-360deg)
}
}
</style>
<body>
<div class="toast">
<span class="load"></span>
<span>加载中...</span>
</div>
<script src="/UploadFiles/2021-04-02/jquery.min.js">
效果：
