https://justinribeiro.com/chronicle/2009/10/02/jquery-ui-modal-form-with-validation-and-form-plugin-integration/
jQuery UI modal form with Validation and Form plugin integration - Justin Ribeiro, Ph.D.
form with validationjquery uiplugin integration
https://docs.flutter.dev/cookbook/forms/validation
Build a form with validation
How to build a form that validates input.
build a form with validation