petyosi / React Virtuoso

React Virtuoso is the most powerful React virtual list component, full stop. Here's why:

• Variable sized items out of the box; no manual measurements or hard-coding item heights is necessary;
• Support for reverse (bottom up) scrolling and prepending items (chat, feeds, etc);
• Grouped mode with sticky headers;
• Responsive grid layout;
• 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.

For live examples and documentation, check the documentation website.

Sponsors

React Virtuoso is proudly sponsored by Stream, the leading provider in enterprise grade Feed & Chat APIs. To learn more about Stream, click here.

If you are using Virtuoso for work, sponsor it. Any donation helps a lot with the project development and maintenance.

Get Started

npm install react-virtuoso

import * as React from 'react'
import * as ReactDOM from 'react-dom'
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'))

Grouped Mode

The GroupedVirtuoso component is a variant of the "flat" Virtuoso, 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.

Works With Your UI Library of Choice

You can customize the markup up to your requirements - check the Material UI list demo. If you need to support reordering, check the React Sortable HOC example.

Documentation and Demos

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

Author

Petyo Ivanov @petyosi.

Contributing

Fixes and new Features

To run the tests, use npm run test. An end-to-end browser-based test suite is runnable with npm run e2e, with the pages being e2e/*.tsx and the tests e2e/*.test.ts.

A convenient way to debug something is to preview the test cases in the browser. To do that, run npm run browse-examples - it will open a crude UI that lets you browse the components in the e2e folder.

Docs

The documentation site is built with docusaurus and the content is available in the site/docs directory. The API reference is generated from the doc comments in src/components.tsx.

License

MIT License.