jQuery XPath 是一个 jQuery 插件，实现了全功能的 XPath 2.0 查询语言。
示例代码：
$(document).xpath("*"); // Returns {Element} html (direct child of context item - document) $(document).xpath("//head << //body"); // Returns {Boolean} true (head is preceding body) $(document).xpath("//*[parent::html][last()]") // Returns {Element} body (last child of html) $(document.body).xpath("count(ancestor::node())"); // Returns {Number} 2 (2 ancestor nodes) $(document.body).xpath("preceding-sibling::element()"); // Returns {Element} head (prev sibling) $(document.documentElement).xpath("body | head"); // Returns {Element} head and body (ordered) $(document.documentElement).xpath("body, head"); // Returns {Element} body and head (not ordered)
