115S站长学院 TIY
编辑您的代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <style type="text/css"> p[class~="important"] { color: red; } </style> </head> <body> <h1>可以应用样式：</h1> <p class="important warning">This is a paragraph.</a> <p class="important">This is a paragraph.</a> <hr /> <h1>无法应用样式：</h1> <p class="warning">This is a paragraph.</a> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?72e1eb95f3722bd737488ab37f422304"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </body> </html>
查看结果: