JavaScript can be used to implement more robust back-end validation by connecting to a validation service that uses sophisticated logic, such as checking the validity of email address domains or ...

Learn how to use JavaScript for form processing, validation, and more. ... Using JavaScript in HTML forms. ... Thus far we have restricted ourselves to creating forms with plain old JavaScript.

MVC & Razor Pages support creating server rendered forms with client validation where the client validation is based on data annotations and then implemented with framework provided client-side ...