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Style <input> elements with a required attribute with CSS

Use the CSS : required selector to style <input> elements with a "required" attribute.

Example

You can try to run the following code to implement the :required Selector

<!DOCTYPE html>
<html>
   <head>
      <style>
         input:required {
            background-color: orange;
         }
      </style>
   </head>
   <body>
      <form>
         Subject: <input type = "text" name = "subject" value = "C++"><br>
         Student: <input type = "text" name = "student" value = "Amit" required><br>
      </form>
   </body>
</html>