When should you use scroll events?

Scroll events in JavaScript are crucial when you want to execute certain actions based on the user's scroll position on a webpage. They can enhance user experience by triggering animations, lazy loading images, or implementing sticky navigation bars. However, it's essential to use them wisely to avoid performance issues, as excessive scroll events can lead to unnecessary rendering and lag.

Some key scenarios when to use scroll events include:

• Triggering animations as elements come into view (e.g., for storytelling websites).
• Lazy loading images or content to improve page load times.
• Creating infinite scrolling experiences for content-heavy sites.
• Implementing sticky headers that stay fixed at the top while scrolling down.
• Displaying back-to-top buttons that appear once the user scrolls down a certain amount.