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What is react-window?

bvaughn/react-window — explained in plain English

Analysis updated 2026-06-24

★ 17,176TypeScriptAudience · developerComplexity · 2/5Setup · easy

In one sentence

React component library that renders very large lists and grids efficiently by only drawing the items visible on screen, keeping pages smooth even with thousands of rows or columns.

Mindmap

mindmap
  root((react-window))
    What it does
      Virtual scrolling
      Render visible items only
      Large list support
    Components
      FixedSizeList
      VariableSizeList
      FixedSizeGrid
    Use cases
      Big data tables
      Search result lists
      Admin dashboards
    Tech stack
      TypeScript
      React
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Code map

Detail Auto

An interactive map of this repo's files and how they connect — its source is parsed live in your browser. Click Visualize to build it.

filefunction / class

What do people build with it?

USE CASE 1

Display a table with 10,000 rows in a React app without the page freezing or becoming slow.

USE CASE 2

Build a virtual-scrolling list of search results that stays smooth as the list grows.

USE CASE 3

Render a large data grid with many columns in a React admin dashboard without performance issues.

What is it built with?

TypeScriptReactJavaScript

How does it compare?

bvaughn/react-windowsindresorhus/type-festleon-ai/leon
Stars17,17617,13217,224
LanguageTypeScriptTypeScriptTypeScript
Setup difficultyeasyeasyhard
Complexity2/52/54/5
Audiencedeveloperdevelopervibe coder

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
License not mentioned in the explanation.

So what is it?

react-window is a component library for React, a popular JavaScript library for building user interfaces. It helps render large lists of data quickly and avoids the performance problems that usually appear when a page tries to put a lot of items on screen at once. The same approach also applies to tabular data, meaning grids and tables with many rows or columns. You would reach for react-window any time you need to display thousands of rows or list items in a web app without the page becoming sluggish. According to the README, it is used in projects such as React DevTools and the Replay browser. The README does not provide further architectural detail in the portion shown, so a fuller explanation is not possible from the provided data alone.

Copy-paste prompts

Prompt 1
Using react-window, write a React component that renders a list of 50,000 items with a fixed row height and smooth scrolling.
Prompt 2
Show me how to use react-window's VariableSizeList to render list items of different heights.
Prompt 3
How do I add infinite scroll to a react-window FixedSizeList so more items load as the user scrolls down?
Prompt 4
Give me an example of a react-window FixedSizeGrid for displaying a spreadsheet-like table with many rows and columns.
Prompt 5
How do I integrate react-window with react-virtualized-auto-sizer to make the list fill its container?

Frequently asked questions

What is react-window?

React component library that renders very large lists and grids efficiently by only drawing the items visible on screen, keeping pages smooth even with thousands of rows or columns.

What language is react-window written in?

Mainly TypeScript. The stack also includes TypeScript, React, JavaScript.

What license does react-window use?

License not mentioned in the explanation.

How hard is react-window to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is react-window for?

Mainly developer.

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