There are dozens of events that can be programmed for your web pages. Most of them center around mouse actions, but some could be programmed for keyboard events. There are things that can be done while the page is being scrolled, things we can do when the page loads, and things we can do even when the page is being closed.

Which events are the best to program for? Which ones may not be good to program? Give some reasons for your selection of events to program for or not program for, and give examples of pages and event handling that exemplify best practices.