下划线滑动效果
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>下划线滑动效果</title>
<script type="text/javascript" src="jquery-3.4.1.js"></script>
<style type="text/css">
*{margin: 0;padding: 0;}
ul{list-style: none;font-size: 20px;}
li{width: 200px;line-height: 40px;background-color: #AF3434;float: left;text-align: center;color: #FFF;}
#box{width: 1000px;margin: 20px auto;box-shadow: 0 2px 10px #000;height: 40px;position: relative;}
.line{width: 200px;height: 2px;background-color: #FFF;position: absolute;margin-top: 38px;}
</style>
<script type="text/javascript">
$(function(){
$('li').hover(
function(){
$x=parseInt($(this).attr('name'))*200
$('.line').stop().animate({left:$x+'px'},200)
},
function(){
$('.line').stop().animate({left:'0px'},200)
}
)
})
</script>
</head>
<body>
<div id="box">
<ul>
<li name='0'>导航一</li>
<li name='1'>导航二</li>
<li name='2'>导航三</li>
<li name='3'>导航四</li>
<li name='4'>导航五</li>
</ul>
<div class="line"></div>
</div>
</body>
</html>