有悬停效果但没有颜色
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>强调内容</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
</head>
<style type="text/css" media="screen">
td{
width: 100px;
height: 40px;
}
</style>
<body>
<table class='table-striped table-hover'>
<th colspan="" rowspan="" headers="" scope="">A</th>
<th colspan="" rowspan="" headers="" scope="">B</th>
<th colspan="" rowspan="" headers="" scope="">C</th>
<tr class="warning">
<td colspan="" rowspan="" headers="">1</td>
<td colspan="" rowspan="" headers="">2</td>
<td colspan="" rowspan="" headers="">3</td>
</tr class="active">
<tr>
<td colspan="" rowspan="" headers="">1</td>
<td colspan="" rowspan="" headers="">2</td>
<td colspan="" rowspan="" headers="">3</td>
</tr>
<tr>
<td colspan="" rowspan="" headers="">1</td>
<td colspan="" rowspan="" headers="">2</td>
<td colspan="" rowspan="" headers="">3</td>
</tr>
</table>
</body>
</html>
