<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>css3-scanner</title>
<style>
.qr-scanner {
position: relative;
height: 200px; width: 200px;
margin: 0px auto;/*此处为了居中*/
background:url("er.jpg");
background-repeat: no-repeat;
}
.qr-scanner .box {
width: 30vw;
height: 30vw;
max-height: 30vh;
max-width: 30vh;
position: relative;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
overflow: hidden;
border: 0.1rem solid rgba(0, 255, 51, 0.2);
}
.qr-scanner .line {
height: calc(100% - 2px);
width: 100%;
background: linear-gradient(180deg, rgba(0, 255, 51, 0) 43%, #00ff33 211%);
border-bottom: 3px solid #00ff33;
transform: translateY(-100%);
animation: radar-beam 2s infinite;
animation-timing-function: cubic-bezier(0.53, 0, 0.43, 0.99);
animation-delay: 1.4s;
}
.qr-scanner .box:after,
.qr-scanner .box:before,
.qr-scanner .angle:after,
.qr-scanner .angle:before {
content: '';
display: block;
position: absolute;
width: 3vw;
height: 3vw;
border: 0.2rem solid transparent;
}
.qr-scanner .box:after,
.qr-scanner .box:before {
top: 0;
border-top-color: #00ff33;
}
.qr-scanner .angle:after,
.qr-scanner .angle:before {
bottom: 0;
border-bottom-color: #00ff33;
}
.qr-scanner .box:before,
.qr-scanner .angle:before {
left: 0;
border-left-color: #00ff33;
}
.qr-scanner .box:after,
.qr-scanner .angle:after {
right: 0;
border-right-color: #00ff33;
}
@keyframes radar-beam {
0% {
transform: translateY(-100%);
}
100% {
transform: translateY(0);
}
}
</style>
</head>
<body>
<div class="qr-scanner">
<div class="box">
<div class="line"></div>
<div class="angle"></div>
</div>
</div>
</body>
</html>
标签：box,qr,angle,scanner,扫描,二维码,border,css,before From： https://www.cnblogs.com/ddqyc/p/16658823.html