Infinite scrolling (onEndReached) in React Native - Build, Publish & Deploy

Build & Publish - Infinite scrolling (onEndReached)

Performance Impact

Infinite scrolling loads more data as the user scrolls near the end of a list. This keeps the UI smooth by loading small chunks instead of all data at once. It helps maintain a steady frame rate around 60fps by avoiding heavy work on the main thread. However, if too many items accumulate in memory, it can increase memory use and slow down scrolling. Battery use may rise if network requests happen too often or if rendering is complex.

Optimization Tips

To keep scrolling smooth at 60fps, load data in small batches and avoid loading too early or too late. Use React Native's FlatList with onEndReachedThreshold set properly to trigger loading just before the user reaches the end. Use keyExtractor for stable keys and getItemLayout if item sizes are fixed to optimize rendering. Avoid heavy computations in render methods. Cache data and debounce network calls to reduce load. Remove off-screen items with windowSize and maxToRenderPerBatch props.

App Size and Startup Time

Infinite scrolling itself adds minimal code size since it uses built-in components like FlatList. However, including large libraries for data fetching or caching can increase bundle size. Loading data on demand reduces initial startup time because the app does not fetch or render all data at launch. This improves perceived startup speed and user experience.

iOS vs Android Differences

Both iOS and Android support infinite scrolling in React Native using FlatList. On iOS, smooth scrolling is often easier due to UIKit optimizations. Android devices vary more in performance, so tuning FlatList props is important. Android may require more aggressive item recycling and batch rendering settings. Network request handling and caching behave similarly but watch for platform-specific memory limits. Testing on both platforms ensures consistent experience.

Store Review Guidelines

Infinite scrolling must not cause excessive data usage or battery drain. Follow Apple's Human Interface Guidelines to provide user control and feedback during loading. On Google Play, ensure your app handles network errors gracefully and does not crash when loading more data. Both stores require accessibility support; make sure list items are accessible via screen readers and keyboard navigation. Avoid misleading users with endless loading without clear progress or end.

Self-Check Question

Your app takes 5 seconds to load this screen with infinite scrolling. What's likely wrong?

• Loading too much data upfront instead of in small batches.
• Not using onEndReachedThreshold properly, causing delayed data fetch.
• Heavy rendering or complex components slowing UI thread.
• Network requests blocking UI or not cached efficiently.

Key Result

Infinite scrolling in React Native improves user experience by loading data in chunks, keeping UI smooth and startup fast. Proper tuning of FlatList props and efficient data fetching are key to maintaining 60fps and low memory use. Both iOS and Android require testing for smoothness and accessibility. Store guidelines emphasize user control, error handling, and performance.