With HTML forms submissions today, web developers typically must use JavaScript to ensure values are provided when required and are within appropriate ranges and types. HTML5 offers form field ...

Of all the hats JavaScript can wear, its form-processing features are among the most sought and used. Learn how to use JavaScript for form processing, validation, and more.

Most web frameworks I've seen handle form validation using exceptions; if the form fields or the whole form don't meet the requirements, an exception is thrown and dealt with (redirect back to the ...