操作html字符串

var html = '<div><h4><a href="content.html">Headline</a></h4></div>';
var $html = $(html);
$html.find('h4').empty();
$html[0].outerHTML;

结果：

"<div><h4></h4></div>"

参考：
https://blog.csdn.net/weixin_33720956/article/details/93448759?utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-6.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-6.control