W3School TIY
编辑您的代码：
<!DOCTYPE html> <html> <head> <script type="text/javascript" src="../jquery/jquery.js"></script> </head> <body> <ul class="first"> <li class="foo">list item 1</li> <li>list item 2</li> <li class="bar">list item 3</li> </ul> <ul class="second"> <li class="foo">list item 1</li> <li>list item 2</li> <li class="bar">list item 3</li> </ul> <script>$('ul.first.htm').find('.foo') .css('background-color', 'red') .end().find('.bar') .css('background-color', 'green') .end();</script> </body> </html>
查看结果: