为带有 CSS 焦点的元素设置样式
要选择具有焦点的元素,请使用:focus 选择器。您可以尝试运行以下代码来实现:focus 选择器 −
示例
<!DOCTYPE html> <html> <head> <style> input:focus { background-color: green; } </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>
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