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(){ $("p:has(span)").css("border","solid red"); }); </script> </head> <body> <p><span>This is a span element inside a p element.</span></p> <p>This is a p element with no span element.</p> </body> </html>
运行结果：