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<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style> .red-point{ position: relative; } .red-point::before{ content: " "; border: 3px solid red;/*设置红色*/ border-radius:3px;/*设置圆角*/ position: absolute; z-index: 1000; right: 0%; margin-right: -5px; margin-top: -5px; } </style> </head> <body> <span>hello world</span> </body> </html>
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