W3School TIY
编辑您的代码：
<!DOCTYPE html> <html> <head> <style> div { width: 80px; height: 80px; background: #abc; border: 2px solid black; margin: 10px; float: left; } div.after { border-color: red; } </style> <script type="text/javascript" src="../jquery/jquery.js"></script> </head> <body> <div>first</div> <div>sibling<div>child</div></div> <div>sibling</div> <div>sibling</div> <script> $("div:first").nextAll().addClass("after"); </script> </body> </html>
查看结果: