Oleg Mikheev looks under the hood of the Struts 2 validation mechanism and shows you how its Java, JavaScript, and Ajax support can take the pain out of Web-form validation.

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.

Vest is a new framework-agnostic form validation library that separates the validation logic from the feature logic while using a unit testing syntax style that is similar to Mocha and Jasmine.

A comprehensive front-end form validation project built with HTML5, CSS3 (Bootstrap 5), and vanilla JavaScript. Features real-time validation, accessibility support, and responsive design.

However, some people like to perform an Ajax based JavaScript upload from the client to avoid needless request-response cycles in the browser. To do an Ajax and JavaScript file upload to Node.js, ...

Do you need to perform an Ajax file upload with pure JavaScript? This example lays out the steps to accomplish an Ajax file upload without the need for a JavaScript library like jQuery or Dojo.

Here's how to integrate the ASP.NET CustomValidator control with client-side code to create a page that uses Ajax and server-side code to validate data at the browser.