有趣的css - 好看的呼吸灯效果
整体效果
这个效果主要用 css3 的 animation 属性来实现的。
这个效果可以用作在网站的整体 Loading，也可以放在网站首屏当一个 banner 的背景也是非常棒的！
代码部分
html 部分代码：
<div class="app">
<span class="red">span>
<span class="green">span>
<span class="blue">span>
div>
写出三个圆，class 分别为 .red、.green、.blue。
css 部分代码：
.app{
width:100%;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
span{
width: 60px;
height: 60px;
margin: 40px;
border-radius: 50%;
}
.red{
animation: just1 2s ease-in-out infinite alternate;
}
.green{
animation: just2 3s ease-in-out infinite alternate;
}
.blue{
animation: just3 4s ease-in-out infinite alternate;
}
@keyframes just1{
0%{
border: 5px solid rgba(255,0,0,0);
box-shadow: 0 0 0 rgba(255,0,0,0),0 0 0 rgba(255,0,0,0) inset;
}
100%{
border: 5px solid rgba(255,0,0,1);
box-shadow: 0 0 70px rgba(255,0,0,0.7),0 0 15px rgba(255,0,0,0.5) inset;
}
}
@keyframes just2{
0%{
border: 5px solid rgba(0,255,0,0);
box-shadow: 0 0 0 rgba(0,255,0,0),0 0 0 rgba(0,255,0,0) inset;
}
100%{
border: 5px solid rgba(0,255,0,1);
box-shadow: 0 0 70px rgba(0,255,0,0.7),0 0 15px rgba(0,255,0,0.5) inset;
}
}
@keyframes just3{
0%{
border: 5px solid rgba(0,0,255,0);
box-shadow: 0 0 0 rgba(0,0,255,0),0 0 0 rgba(0,0,255,0) inset;
}
100%{
border: 5px solid rgba(0,0,255,1);
box-shadow: 0 0 70px rgba(0,0,255,0.7),0 0 15px rgba(0,0,255,0.5) inset;
}
}
css 部分主要使用 animation 来实现边框及其阴影的大小变化，和其透明度的变化。
完整代码如下
html 页面：
DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>好看的呼吸灯效果title>
head>
<body>
<div class="app">
<span class="red">span>
<span class="green">span>
<span class="blue">span>
div>
body>
html>
css 样式：
/** style.css **/
*{
margin:0;
padding: 0;
}
body,html{
background-color: #000;
}
.app{
width:100%;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
span{
width: 60px;
height: 60px;
margin: 40px;
border-radius: 50%;
}
.red{
animation: just1 2s ease-in-out infinite alternate;
}
.green{
animation: just2 3s ease-in-out infinite alternate;
}
.blue{
animation: just3 4s ease-in-out infinite alternate;
}
@keyframes just1{
0%{
border: 5px solid rgba(255,0,0,0);
box-shadow: 0 0 0 rgba(255,0,0,0),0 0 0 rgba(255,0,0,0) inset;
}
100%{
border: 5px solid rgba(255,0,0,1);
box-shadow: 0 0 70px rgba(255,0,0,0.7),0 0 15px rgba(255,0,0,0.5) inset;
}
}
@keyframes just2{
0%{
border: 5px solid rgba(0,255,0,0);
box-shadow: 0 0 0 rgba(0,255,0,0),0 0 0 rgba(0,255,0,0) inset;
}
100%{
border: 5px solid rgba(0,255,0,1);
box-shadow: 0 0 70px rgba(0,255,0,0.7),0 0 15px rgba(0,255,0,0.5) inset;
}
}
@keyframes just3{
0%{
border: 5px solid rgba(0,0,255,0);
box-shadow: 0 0 0 rgba(0,0,255,0),0 0 0 rgba(0,0,255,0) inset;
}
100%{
border: 5px solid rgba(0,0,255,1);
box-shadow: 0 0 70px rgba(0,0,255,0.7),0 0 15px rgba(0,0,255,0.5) inset;
}
}
页面效果：
以上就是所有代码，css3 有很多好玩的属性，可以实现非常多的效果，让页面视觉变的更丰富多彩!
[1] 阅读原文
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