<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>京东侧边</title>
<style>
*{
padding: 0;
margin:0;
}
.subnav{
margin:100px auto;
width: 20px;
}
.subnav li {
width: 20px;
height: 20px;
margin:3px 0px;
background-color: pink;
list-style: none;
position: relative;
}
.subnav li div{
z-index: -1;
position: absolute;
top: 0px;
right: 0px;
width: 0px;
height: 20px;
background-color:red;
transition: all 1s;
}
.subnav li:hover div{
width: 100px;
}
</style>
</head>
<body>
<div class="subnav">
<ul>
<li><div></div></li>
<li><div></div></li>
<li><div></div></li>
<li><div></div></li>
<li><div></div></li>
</ul>
</div>
</body>
011变形之位移与缩放transform
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