If your React app is slowing down when rendering long lists, you’re not alone. A common performance issue in React apps is rendering too many DOM elements at once, causing lag and unnecessary re-renders. That’s where TanStack Virtual (formerly React Virtual) comes in.
In this video, I’ll show you how to virtualize your lists to make your app faster and more efficient. We’ll go over how virtualization works and how you can implement it using TanStack Virtual. Whether you're building a dashboard, data table, chat app, or infinite scroll UI, virtualized rendering can massively improve performance.
By the end of this tutorial, you’ll know exactly how to use TanStack Virtual to boost your React app’s speed and keep it smooth, even with thousands of items.
Timestamps:
0:00 - Your app is slow
1:09 - TanStack Virtual Setup
4:11 - JSX & Divs Setup
7:21 - Virtual Items
11:12 - Positioning Explanation
12:49 - Finish positioning
15:00 - Virtual demo
17:34 - Horizontal Virtualization
18:35 - Destructuring virtual item
19:05 - Window Virtualization (whole page)
21:18 - Dynamic Virtualization
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