Some of the most important events especially for e-commerce sites are form events. Form events are used heavily when providing users with cart interactions, checkouts, registrations, and more. Adding event handlers to form events allows you to provide some dynamic interactions with the user as the user fills out the forms.
The following phrases are designed to cover the basic concepts of handling the different types of form events. Additionally, there are keyboard and mouse events in the form that have already been covered in this chapter.