Infinite Scroll

Summary

A feed that loads more content automatically as the user scrolls near the bottom — practice for the Intersection Observer API and paginated data fetching. Infinite scrolling also requires careful state management to avoid duplicate requests, race conditions, repeated loading, inaccessible content, and poor scroll performance.

• 1Use the Intersection Observer API to detect when the user nears the bottom. Verify the behavior with realistic data and handle the failure or empty state as well.
• 2Show a loading indicator while the next page of data fetches. Validate your understanding by applying it in a small practical example.
• 3Handle the 'end of results' state so it doesn't loop or error out.