Why Infinite scrolling (onEndReached) in React Native? - Purpose & Use Cases

The Big Idea

What if your app could magically load more content just when you need it, without any waiting?

The Scenario

Imagine you have a long list of items, like a photo gallery or messages, and you want to show them all at once on your phone screen.

You try to load every single item manually when the app starts.

The Problem

This approach makes your app slow and clunky because it tries to load too much data at once.

Users have to wait a long time, and the app might even crash or freeze.

The Solution

Infinite scrolling with onEndReached lets your app load just a few items at first.

When the user scrolls near the end, the app automatically loads more items smoothly.

This keeps the app fast and responsive, giving a better experience.

Before vs After

✗ Before

loadAllItems();
displayList(items);

✓ After

loadInitialItems();
const onEndReached = () => loadMoreItems();

What It Enables

You can create smooth, fast lists that grow as the user scrolls, without freezing or long waits.

Real Life Example

Think of social media apps like Instagram or Twitter where new posts appear as you scroll down endlessly.

Key Takeaways

Loading all data at once slows down apps and wastes resources.

onEndReached triggers loading more data only when needed.

This technique creates smooth, user-friendly scrolling experiences.