W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <style type="text/css"> body { background-color:#B8BFD8; } </style> <script type="text/javascript"> function changeStyle() { document.body.style.backgroundColor="#FFCC80"; } </script> </head> <body> <input type="button" onclick="changeStyle()" value="Change background color" /> </body> </html>