Client-side validation is done using JavaScript or HTML5 and can be done without submitting the form to the server. The simplest HTML validation feature is the required attribute.

Learn to integrate JavaScript for enhanced HTML5 form validation control in web development projects.

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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.

simple webpage that demonstrates how to use the jQuery Validation plugin to validate form fields in real-time. The form includes fields for user first name, last name, email, password, ZIP code, age ...

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.