# petyosi/react-virtuoso

The most powerful virtual list component for React

Repository: https://github.com/petyosi/react-virtuoso
Canonical: https://ross.abutalabs.com/products/react-virtuoso
Homepage: https://virtuoso.dev
Language: TypeScript
License Family: other
Topics: react, virtualizedlist, component-library, feed, chat, virtual, hacktoberfest
Last push: 2026-08-17T08:15:23+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 98, longevity 100
- inputs: {"age_days": 2679, "days_push": 16, "days_rel": 16, "gap_med": 3.5, "n_releases_24m": 59}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6451, forks 353 (observed 2026-08-28T04:09:43.488551+00:00)

## What it is
React Virtuoso is a React component library for virtualized rendering of lists, grids, tables, masonry layouts, and chat message lists. It handles variable-sized items automatically without manual height measurements and supports features like grouped sticky headers, endless scrolling, and reverse-scrolling chat interfaces.

## Use cases
- render large lists with thousands of items in react
- virtualized chat message list with auto-scroll
- infinite scrolling feed with load more
- grouped list with sticky headers
- virtualized data table with sticky columns
- masonry image gallery layout
- variable height items without hardcoding heights

## When to choose
- you need to render very long or unbounded lists in React with smooth performance
- item heights are unknown or variable
- you're building a chat UI, feed, or grouped list with sticky headers
- you want lists, grids, tables, and masonry from one library

## When to avoid
- you're not using React
- you only render a handful of items and virtualization adds unnecessary complexity
- you need the commercial VirtuosoMessageList chat component without a license budget
- you need a fully MIT-licensed chat message list component

## Facets
- artifact type: library
- maturity: active
- function: ui-components, frontend-framework
- domain: frontend, web-development, performance
- platform: cross-platform
- tags: react, virtualization, virtual-list, virtual-scrolling, chat-ui, infinite-scroll, typescript, component-library, web-server, nodejs

## Member repositories
- petyosi/react-virtuoso (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:43.488551+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:44:39.813618+00:00, confidence not recorded.
  - readme: https://github.com/petyosi/react-virtuoso (fetched 2026-08-28T04:09:43.488551+00:00, sha 1bc941b85377)
  - homepage: https://virtuoso.dev (fetched 2026-08-29T08:41:42.413479+00:00, sha a0d76100877c)
  - site_page: https://virtuoso.dev/pricing (fetched 2026-08-29T08:41:42.422611+00:00, sha 8e0b02bcec27)
- Data as of 2026-08-30T08:39:29.467469+00:00.