Format Code
Run Code
<!DOCTYPE html> <html> <head> <title>Real-time Validation Example</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script> $(document).ready(function(){ $("#name").on("input", function(){ if ($(this).val() === "") { $(this).css("border-color", "red"); } else { $(this).css("border-color", "green"); } }); }); </script> </head> <body> <form> <input type="text" id="name" placeholder="Name"><br> <input type="submit" value="Submit"> </form> </body> </html>
console output