源代码:
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ var treeTraversal = $("span").parents().map(function(){ return this.tagName;}).get().join(", "); $("span").after("<h2>" + treeTraversal + "<h2>"); }); </script> </head> <body> <div> <p> <span>This is is a span element. My ancestors are: </span> </p> </div> </body> </html>
运行结果：