Package Exports

react-tiny-virtual-list

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Readme

react-tiny-virtual-list

A tiny but mighty 2kb list virtualization component, with zero dependencies 💪

Tiny & dependency free – ~2kb gzipped
Render millions of items, without breaking a sweat
Scroll to index or set the initial scroll offset
Supports fixed or variable heights/widths
Vertical or Horizontal lists

Getting Started

Using npm:

npm install react-tiny-virtual-list --save

ES6, CommonJS, and UMD builds are available with each distribution. For example:

import VirtualList from 'react-tiny-virtual-list';

You can also use a global-friendly UMD build:

<script src="react-tiny-virtual-list/umd/react-tiny-virtual-list.js"></script>
<script>
var VirtualList = window.VirtualList.default;
...
</script>

Example usage

import React from 'react';
import {render} from 'react-dom';
import VirtualList from 'react-tiny-virtual-list';

const data = ['A', 'B', 'C', 'D', 'E', 'F', ...];

render(
  <VirtualList
    height={600}
    itemCount={data.length}
    itemSize={50} // Also supports variable heights (array or function getter)
    renderItem={({index, style}) =>
      <div key={index} style={style}> // The style property contains the item's absolute position
        Letter: {data[index]}, Row: #{index}
      </div>
    }
  />,
  document.getElementById('root')
);

Prop Types

Property	Type	Required?	Description
width	Number or String		Width of List. Defaults to `100%`
height	Number	✓	Height of List; This property will determine the number of rendered vs virtualized items.
itemCount	Number	✓	The number of items you want to render
renderItem	Function	✓	Responsible for rendering an item given it's index: `({index: number, style: Object}): React.PropTypes.node`. The returned element must handle key and style.
itemSize		✓	Either a fixed height/width (depending on the scrollDirection), an array containing the heights of all the items in your list, or a function that returns the height of an item given its index: `(index: number): number`
scrollTop	Number		Can be used to control the vertical scroll offset; Useful for setting an initial scroll offset
scrollToIndex	Number		Item index to scroll to (by forcefully scrolling if necessary)
scrollToAlignment			Used in combination with `scrollToIndex`, this prop controls the alignment of the scrolled to item. One of: 'start', 'center' or 'end'
overscanCount	Number		Number of extra buffer items to render above/below the visible items. Tweaking this can help reduce scroll flickering on certain browsers/devices.
estimatedItemSize	Number		Used to estimate the total size of the list before all of its items have actually been measured. The estimated total height is progressively adjusted as items are rendered.

Reporting Issues

Found an issue? Please report it along with any relevant details to reproduce it.

Contributions

Feature requests / pull requests are welcome, though please take a moment to make sure your contributions fits within the scope of the project. Learn how to contribute

Acknowledgments

This library draws inspiration from react-virtualized, and is meant as a bare-minimum replacement for the List component. If you're looking for a tiny, lightweight and dependency-free list virtualization library that supports variable heights, you're in the right place! If you're looking for something that supports more use-cases, I highly encourage you to check out react-virtualized instead, it's a fantastic library ❤️

License

react-tiny-virtual-list is available under the MIT License.