JAVASCRIPTCN.COM
源代码:
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>JavaScript中文网(javascriptcn.com)</title> <style> p:only-of-type { background:#ff0000; } </style> </head> <body> <div><p>This is a paragraph.</p></div> <div><p>This is a paragraph.</p><p>This is a paragraph.</p></div> </body> </html>
运行结果