<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>圆形旋转loading</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
.box{
width: 50px;
height:50px;
margin: 100px;
position: absolute;
}
.box:nth-of-type(2){
transform: rotate(45deg);
}
.box p{
width: 15px;
height: 15px;
background: #0000FF;
border-radius: 50%;
position: absolute;
animation: run 1.5s infinite linear;
}
.box p:nth-of-type(1){ /*左上*/
left: 0;
top: 0;
}
.box p:nth-of-type(2){ /*右上*/
right: 0;
top: 0;
}
.box p:nth-of-type(3){ /*左下*/
left: 0;
bottom: 0;
}
.box p:nth-of-type(4){ /*右下*/
right: 0;
bottom: 0;
}
/*动画效果*/
@keyframes run{
0%{
transform: scale(0);
}
50%{
transform: scale(1);
}
100%{
transform: scale(0);
}
}
/*延迟动画效果 负值是解决蹦动的效果*/
.box:nth-of-type(1) p:nth-of-type(1){
animation-delay: -0.1s;
}
.box:nth-of-type(2) p:nth-of-type(1){
animation-delay: -0.3s;
}
.box:nth-of-type(1) p:nth-of-type(2){
animation-delay: -0.5s;
}
.box:nth-of-type(2) p:nth-of-type(2){
animation-delay: -0.7s;
}
.box:nth-of-type(1) p:nth-of-type(3){
animation-delay: -0.9s;
}
.box:nth-of-type(2) p:nth-of-type(3){
animation-delay: -1.1s;
}
.box:nth-of-type(1) p:nth-of-type(4){
animation-delay: -1.3s;
}
.box:nth-of-type(2) p:nth-of-type(4){
animation-delay: -1.5s;
}
</style>
</head>
<body>
<div class="box">
<p></p>
<p></p>
<p></p>
<p></p>
</div>
<div class="box">
<p></p>
<p></p>
<p></p>
<p></p>
</div>
</body>
</html>
原文：https://www.cnblogs.com/lhl66/p/8975639.html