Form Validations can give the user feedback, letting them know what they need to do in order to input their data correctly.

In this lesson, we use some validations we already have on the video edit form, abstracting them for use in our login form. Then we create a new emailFormat validation to ensure the user is inputting something resembling an email.

This lesson does rely on some code from our Validations series, but if you haven't watched it, that's okay; we explain what you need to know at the start.