This project focuses on advanced form interactivity and client-side validation using JavaScript events. The HTML provides the form structure with fields like Name, dependent State/City selectors, Email, and Password, alongside elements for feedback like an error summary and password strength indicator. The JavaScript is centered on the validarCampos() function, which runs on various input changes. This function checks for required fields, validates email format, assesses password strength (via avaliarForcaSenha), and verifies the acceptance of terms. It dynamically updates a summary of errors and controls the disabled state of the Submit button. Real-time feedback includes color-coded password strength and dynamic population of the City select based on the chosen State. The form's submit listener prevents default submission, ensures final validation, and upon success, resets the form and provides an alert, demonstrating a robust and controlled user experience.