abstract：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>下划线跟随</title> <script type="text/javascript" src="js/jqu
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>下划线跟随</title>
<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
<style type="text/css">
*{margin: 0px;padding: 0px;}
li{list-style: none;float: left;margin: 1px;background: blue;width: 120px;height: 40px;line-height: 40px;text-align: center;}
.line{border-bottom: 2px solid red;}
</style>
</head>
<body>
<script type="text/javascript">
$(document).ready(function(){
$('li').mouseover(function(){
$(this).addClass('line')
})
$('li').mouseleave(function(){
$(this).removeClass('line')
})
})
</script>
<div>
<ul>
<li>啦啦啦啦啦啦</li>
<li>啦啦啦啦啦啦</li>
<li>啦啦啦啦啦啦</li>
<li>啦啦啦啦啦啦</li>
<li>啦啦啦啦啦啦</li>
<li>啦啦啦啦啦啦</li>
</ul>
</div>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-04-03 13:26:12
Teacher's summary：完成的不错。js每行代码结束后，要增加;号。继续加油。
