通过css3动画和opacity透明度实现呼吸灯效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>呼吸灯</title>
/*也可以通过加层罩，通过设置层罩透明度来实现亮度动画*/
<style>
body{
background-color: black;
}
div{
margin: 0 auto;
margin-top: 200px;
width: 300px;
height: 300px;
border-radius: 50%;
background-color: yellow;
box-shadow: 0 0 80px red;
animation-name: light;
animation-duration: 3s;
animation-timing-function: linear;
animation-iteration-count: infinite;
animation-direction: alternate;
}
@keyframes light{
from{
opacity: 1;
}
to{
opacity: 0.2;
}
}
</style></head>
<body>
<div></div>
</body>
</html>
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