是不是_self / self / _blank / blank只有_self是在当前页面跳转 ？
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>test01</title>
</head>
<body>
<p><a href="www.baidu.com" title="百度" target="_self">_self</a></p>
<p><a href="www.baidu.com" title="百度" target="self">self</a></p>
<p><a href="www.baidu.com" title="百度" target="_blank">_blank</a></p>
<p><a href="www.baidu.com" title="百度" target="blank">blank</a></p>
</body>
</html>
