Package Exports

react-window
react-window/dist/index.cjs.js
react-window/dist/index.esm.js
react-window/src
react-window/src/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (react-window) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

react-window

React components for efficiently rendering large lists and tabular data

React window works by only rendering part of a large data set (just enough to fill the viewport). This helps address some common performance bottlenecks:

It reduces the amount of work (and time) required to render the initial view and to process updates.
It reduces the memory footprint by avoiding over-allocation of DOM nodes.

Install

# Yarn
yarn add react-window

# NPM
npm install --save react-window

Usage

Learn more at react-window.now.sh:

react-virtualized-auto-sizer: HOC that grows to fit all of the available space and passes the width and height values to its child.
react-window-infinite-loader: Helps break large data sets down into chunks that can be just-in-time loaded as they are scrolled into view. It can also be used to create infinite loading lists (e.g. Facebook or Twitter).
react-vtree: Lightweight and flexible solution to render large tree structures (e.g., file system).

Frequently asked questions

How is `react-window` different from `react-virtualized`?

I wrote react-virtualized several years ago. At the time, I was new to both React and the concept of windowing. Because of this, I made a few API decisions that I later came to regret. One of these was adding too many non-essential features and components. Once you add something to an open source project, removing it is pretty painful for users.

react-window is a complete rewrite of react-virtualized. I didn't try to solve as many problems or support as many use cases. Instead I focused on making the package smaller¹ and faster. I also put a lot of thought into making the API (and documentation) as beginner-friendly as possible (with the caveat that windowing is still kind of an advanced use case).

If react-window provides the functionality your project needs, I would strongly recommend using it instead of react-virtualized. However if you need features that only react-virtualized provides, you have two options:

Use react-virtualized. (It's still widely used by a lot of successful projects!)
Create a component that decorates one of the react-window primitives and adds the functionality you need. You may even want to release this component to NPM (as its own, standalone package)! 🙂

^{1 - Adding a react-virtualized list to a CRA project increases the (gzipped) build size by ~33.5 KB. Adding a react-window list to a CRA project increases the (gzipped) build size by <2 KB.}

Can a list or a grid fill 100% the width or height of a page?

Yes. I recommend using the react-virtualized-auto-sizer package:

Here's a Code Sandbox demo.

Why is my list blank when I scroll?

If your list looks something like this...

...then you probably forgot to use the style parameter! Libraries like react-window work by absolutely positioning the list items (via an inline style), so don't forget to attach it to the DOM element you render!