W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!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"> [title=W3School] { border:5px solid blue; } </style> </head> <body> <h1>可以应用样式：</h1> <img title="W3School" src="/i/w3school_logo_white.gif" /> <br /> <a title="W3School" href="https://www.w3school.org.cn">W3School</a> <hr /> <h1>无法应用样式：</h1> <p title="greeting">Hi!</p> <a class="W3School" href="https://www.w3school.org.cn">W3School</a> </body> </html>