Laravel We are going to learn how to process a form in Laravel in a basic way, submit it, consume the data from a function and display a response page.

HTML With the pattern attribute we can perform validations without using JavaScript libraries and without using external libraries, specifically regular expressions as we will see below; We will see how to validate, telephone numbers, ips, emails, texts, numbers,

Django Learn how to create and manage forms in Django step by step. We cover everything from the Form and ModelForm classes to data validation and CSRF protection.

CSS Discover how to control :invalid in CSS and show errors only after form submission using HTML5, :user-invalid and UX best practices.