纯css实现的loading效果。
<!DOCTYPE html>
<html>
<head>
<title>SpinKit Examples</title>
<style type="text/css">
:root {
--sk-size: 40px;
--sk-color: #333;
}
.sk-circle {
width: var(--sk-size);
height: var(--sk-size);
position: relative;
}
.sk-circle-dot {
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
}
.sk-circle-dot:before {
content: '';
display: block;
width: 15%;
height: 15%;
background-color: var(--sk-color);
border-radius: 100%;
animation: sk-circle 1.2s infinite ease-in-out both;
}
.sk-circle-dot:nth-child(1) { transform: rotate(30deg); }
.sk-circle-dot:nth-child(2) { transform: rotate(60deg); }
.sk-circle-dot:nth-child(3) { transform: rotate(90deg); }
.sk-circle-dot:nth-child(4) { transform: rotate(120deg); }
.sk-circle-dot:nth-child(5) { transform: rotate(150deg); }
.sk-circle-dot:nth-child(6) { transform: rotate(180deg); }
.sk-circle-dot:nth-child(7) { transform: rotate(210deg); }
.sk-circle-dot:nth-child(8) { transform: rotate(240deg); }
.sk-circle-dot:nth-child(9) { transform: rotate(270deg); }
.sk-circle-dot:nth-child(10) { transform: rotate(300deg); }
.sk-circle-dot:nth-child(11) { transform: rotate(330deg); }
.sk-circle-dot:nth-child(1):before { animation-delay: -1.1s; }
.sk-circle-dot:nth-child(2):before { animation-delay: -1s; }
.sk-circle-dot:nth-child(3):before { animation-delay: -0.9s; }
.sk-circle-dot:nth-child(4):before { animation-delay: -0.8s; }
.sk-circle-dot:nth-child(5):before { animation-delay: -0.7s; }
.sk-circle-dot:nth-child(6):before { animation-delay: -0.6s; }
.sk-circle-dot:nth-child(7):before { animation-delay: -0.5s; }
.sk-circle-dot:nth-child(8):before { animation-delay: -0.4s; }
.sk-circle-dot:nth-child(9):before { animation-delay: -0.3s; }
.sk-circle-dot:nth-child(10):before { animation-delay: -0.2s; }
.sk-circle-dot:nth-child(11):before { animation-delay: -0.1s; }
@keyframes sk-circle {
0%, 80%, 100% {
transform: scale(0); }
40% {
transform: scale(1);
}
}
</style>
</head>
<body>
<div class="sk-circle">
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
<div class="sk-circle-dot"></div>
</div>
</body>
</html>