<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
body,html{
width: 100%;
height: 100%;
}
*{
padding: 0;
margin: 0;
}
.div1 {
position: relative;
top: 0;
left: 0;
width: 50%;
}
.div1:before{
content: "";
display: block;
padding-top: 50%;//高除以宽
}
img{
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
}
</style>
</head>
<body>
<div class="div1">
<img src="1.jpg" alt="">
</div>
</body>
</html>等比例自适应图片
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转载自blog.csdn.net/lbPro0412/article/details/82189766
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