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 = $("div").children().map(function(){ return this.tagName;}).get().join(", "); $("div").after("<h2>" + treeTraversal + "<h2>"); }); </script> </head> <body> <div> This is a div element. My child is: <p> <span></span> </p> </div> </body> In this example, $("div").children will only return P, and not P + SPAN, because children() only traverse a single level down the DOM tree. </html>
运行结果：