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CSS :focus 伪类的用法
ID:13150 / 打印您可以尝试运行以下代码来实现 :focus 伪类
示例
现场演示
<!DOCTYPE html> <html> <head> <style> input:focus { background-color: orange; } </style> </head> <body> <form action = ""> Subject <input type = "text" name = "subject"><br> Student: <input type = "text" name = "student"><br> Age: <input type = "number" name = "age"><br> <input type = "submit" value = "Submit"> </form> </body> </html>输出
