To select an element that has focus, use: focus selector. You can try running the following code to achieve this: Focus Selector -
<!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>The above is the detailed content of Design elements focused on CSS. For more information, please follow other related articles on the PHP Chinese website!
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