整理文档，搜刮出一个css3实现wifi信号逐渐增强效果实例的代码，稍微整理精简一下做下分享。
效果图
下面是实现代码：
<!DOCTYPE html>
<meta charset="utf-8">
<html>
<head>
<title>wifi信号</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
.box {
width: 240px;
height: 240px;
box-sizing: border-box;
position: relative;
margin: 100px auto;
}
.wifi-symbol {
width: 200px;
height: 200px;
margin-left: 18px;
box-sizing: border-box;
overflow: hidden;
transform: rotate(45deg);
}
.wifi-circle {
border: 10px solid #ccc;
border-radius: 50%;
position: absolute;
}
.first {
width: 260px;
height: 260px;
top: 0;
left: 0;
animation: run1 4s linear infinite;
}
@keyframes run1 {
0% {
border-color: #ccc;
}
25% {
border-color: #ccc;
}
50% {
border-color: #ccc;
}
75% {
border-color: #ccc;
}
100% {
border-color: #97a8e6;
}
}
.second {
width: 200px;
height: 200px;
top: 60px;
left: 60px;
animation: run2 4s linear infinite;
}
@keyframes run2 {
0% {
border-color: #ccc;
}
25% {
border-color: #ccc;
}
50% {
border-color: #ccc;
}
75% {
border-color: #97a8e6;
}
100% {
border-color: #ccc;
}
}
.third {
width: 140px;
height: 140px;
top: 120px;
left: 120px;
animation: run3 4s linear infinite;
}
@keyframes run3 {
0% {
border-color: #ccc;
}
25% {
border-color: #ccc;
}
50% {
border-color: #97a8e6;
}
75% {
border-color: #ccc;
}
100% {
border-color: #ccc;
}
}
.fourth {
width: 20px;
height: 20px;
background: #ccc;
top: 180px;
left: 180px;
animation: run4 4s linear infinite;
}
@keyframes run4 {
0% {
background: #ccc;
border-color: #ccc;
}
25% {
background: #97a8e6;
border-color: #97a8e6;
}
50% {
background: #ccc;
border-color: #ccc;
}
75% {
background: #ccc;
border-color: #ccc;
}
100% {
background: #ccc;
border-color: #ccc;
}
}
</style>
</head>
<body>
<div class="box">
<div class="wifi-symbol">
<div class="wifi-circle first"></div>
<div class="wifi-circle second"></div>
<div class="wifi-circle third"></div>
<div class="wifi-circle fourth">
</div>
</div>
</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。