React Virtuoso

December 31, 2025 · View on GitHub

The most complete React virtualization rendering family of components.

Variable sized items out of the box; no manual measurements or hard-coding item heights is necessary;
Chat message list UI;
Grouped mode with sticky headers;
Responsive grid layout;
Masonry layout;
Table Support;
Automatic handling of content resize;
Custom Header, Footer, and empty list components;
Pinned top items;
Endless scrolling, press to load more;
Initial top most item index;
Scroll to index method.

Get Started

npm install react-virtuoso

import { Virtuoso } from 'react-virtuoso'

const App = () => {
  return <Virtuoso style={{ height: '400px' }} totalCount={200} itemContent={(index) => <div>Item {index}</div>} />
}

ReactDOM.render(<App />, document.getElementById('root'))

Documentation

For in-depth documentation and live examples of all supported features, check the documentation website.

The Virtuoso message list component is built specifically for human/chatbot conversations. In addition to the virtualized rendering, the component exposes an imperative data management API that gives you the necessary control over the scroll position when older messages are loaded, new messages arrive, and when the user submits a message. The scroll position can update instantly or with a smooth scroll animation.

Grouped Mode

The GroupedVirtuoso component is a variant of the flat Virtuoso component, with the following differences:

Instead of totalCount, the component exposes groupCounts: number[] property, which specifies the amount of items in each group. For example, passing [20, 30] will render two groups with 20 and 30 items each;
In addition the itemContent property, the component requires an additional groupContent property, which renders the group header. The groupContent callback receives the zero-based group index as a parameter.

Grid

The VirtuosoGrid component displays same sized items in multiple columns. The layout and item sizing is controlled through CSS class properties, which allows you to use media queries, min-width, percentage, etc.

Masonry

The Masonry component renders columns from varying-height items, suitable for product listings, image galleries, etc.

Table

The TableVirtuoso component works just like Virtuoso, but with HTML tables. It supports window scrolling, sticky headers, sticky columns, and works with Tanstack Table and MUI Table.