What is react-window and how can I use it?

What is react-window and how can I use it?

React-window is a library for efficiently rendering large lists and tabular data in React applications. It helps improve performance by only rendering the items that are visible in the viewport.

How does it differ from react-virtualized?

While both libraries aim to optimize rendering, react-window is a lighter and simpler alternative to react-virtualized, focusing on fewer features and better performance for basic use cases.

Can you give me an example of how to implement it?

Sure! Here's a simple example:

import { FixedSizeList as List } from 'react-window';

const MyList = () => (
  <List
    height={150}
    itemCount={1000}
    itemSize={35}
    width={300}
  >
    {({ index, style }) => <div style={style}>Item {index}</div>}
  </List>
);

This code creates a list of 1000 items, rendering only those visible in the 150px height.

Are there any performance considerations I should be aware of?

Yes, ensure that the item size is consistent for optimal performance, and avoid complex components within the list items to maintain fast rendering.