zhongwuhuang
commented
4 years ago <!DOCTYPE html>
Open haizhilin2013 opened 4 years ago
zhongwuhuang
commented
4 years ago <!DOCTYPE html>
zhaofeipeter
commented
4 years ago <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title></title>
<style>
body {
margin: 0;
/ 绝对定位使height: 100%生效 /
position: absolute;
height: 100%;
width: 100%;
}
/ 背景图 使用margin auto实现垂直水平居中 /
.wrap {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;
width: 500px;
height: 350px;
background: rgb(97, 170, 189);
}
/ 灯框架 /
.traffic-light {
/ 居中代码 /
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;
text-align: center;
/ 绘制图案 /
width: 300px;
height: 90px;
background: #282f2f;
border-radius: 50px;
box-shadow: 0 0 0 2px #eee inset;
}
.traffic-light::after {
/ 居中代码 /
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
content: '';
display: inline-block;
width: 70px;
height: 70px;
border-radius: 50%;
animation: traffic-light 5s linear 0s infinite;
}
@keyframes traffic-light {
from {
background: transparent; / 黄灯 /
box-shadow:
-85px 0 0 0 transparent, / 红灯 /
85px 0 0 0 transparent, / 绿灯 /
-85px 0 15px 0 transparent, / 红灯光影 /
0px 0 15px 0 transparent, / 黄灯光影 /
85px 0 15px 0 transparent; / 绿灯光影 /
}
25% {
background: transparent; / 黄灯 /
box-shadow:
-85px 0 0 0 rgb(247, 78, 26), / 红灯 /
85px 0 0 0 transparent, / 绿灯 /
-85px 0 15px 0 rgb(247, 78, 26), / 红灯光影 /
0px 0 15px 0 transparent, / 黄灯光影 /
85px 0 15px 0 transparent; / 绿灯光影 /
}
50% {
background: rgb(231, 183, 78); / 黄灯 /
box-shadow:
-85px 0 0 0 transparent, / 红灯 /
85px 0 0 0 transparent, / 绿灯 /
-85px 0 15px 0 transparent, / 红灯光影 /
0px 0 15px 0 rgb(231, 183, 78), / 黄灯光影 /
85px 0 15px 0 transparent; / 绿灯光影 /
}
75% {
background: transparent; / 黄灯 /
box-shadow:
-85px 0 0 0 transparent, / 红灯 /
85px 0 0 0 rgb(38, 175, 84), / 绿灯 /
-85px 0 15px 0 transparent, / 红灯光影 /
0px 0 15px 0 transparent, / 黄灯光影 /
85px 0 15px 0 rgb(38, 175, 84); / 绿灯光影 /
}
to {
background: transparent; / 黄灯 /
box-shadow:
-85px 0 0 0 transparent, / 红灯 /
85px 0 0 0 transparent, / 绿灯 /
-85px 0 15px 0 transparent, / 红灯光影 /
0px 0 15px 0 transparent, / 黄灯光影 /
85px 0 15px 0 transparent; / 绿灯光影 /
}
}
</style>
</head>
<body>
<div class="wrap">
<div class="traffic-light"></div>
</div>
</body>
</html>
第390天 使用css写一个红绿灯交替的动画效果
我也要出题