whatisgithub

What is react-window?

gaearon/react-window — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2019-04-12

★ 12JavaScriptAudience · developerComplexity · 2/5DormantSetup · easy

In one sentence

A React library that renders only the visible rows of huge lists or tables, keeping scrolling fast even with thousands of items.

Mindmap

mindmap
  root((react-window))
    What it does
      Renders visible items only
      Swaps items on scroll
      Keeps memory low
    Tech stack
      JavaScript
      React
    Use cases
      Long social feeds
      Big spreadsheets
      Email inboxes
    Audience
      Frontend developers
    Origin
      Simplified rewrite
      Smaller than predecessor
      Beginner friendly docs

Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Render a social media feed with thousands of posts without slowing down the page.

USE CASE 2

Build a spreadsheet or table view with millions of rows that scrolls smoothly.

USE CASE 3

Speed up an email inbox or photo gallery by only drawing visible items.

What is it built with?

JavaScriptReact

How does it compare?

gaearon/react-windowazurecertprep/azurecertprep.github.iocheiineeey/always-here
Stars121212
LanguageJavaScriptJavaScriptJavaScript
Last pushed2019-04-12——
MaintenanceDormant——
Setup difficultyeasymoderatehard
Complexity2/53/5—
Audiencedeveloperops devopsdeveloper

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

How do you get it running?

Difficulty · easy Time to first run · 30min

Requires restructuring list rendering to use the library's item-renderer function pattern.

Copy-paste prompts

Prompt 1
Help me set up react-window to virtualize a long list of items in my React app.
Prompt 2
Show me how to write the row-rendering function react-window expects for my dataset.
Prompt 3
My React list with thousands of rows is slow, help me convert it to use react-window.

Frequently asked questions

What is react-window?

A React library that renders only the visible rows of huge lists or tables, keeping scrolling fast even with thousands of items.

What language is react-window written in?

Mainly JavaScript. The stack also includes JavaScript, React.

Is react-window actively maintained?

Dormant — no commits in 2+ years (last push 2019-04-12).

How hard is react-window to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is react-window for?

Mainly developer.

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