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react-virtualized

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react-virtualized

React components for efficiently rendering large, scrollable lists and tabular data

  • 9.22.5
  • latest
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  • npm
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Weekly downloads
342K
decreased by-63.16%
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What is react-virtualized?

The react-virtualized npm package provides efficient rendering of large lists and tabular data by only rendering the items that are currently visible within the viewport. This can significantly improve the performance of applications that need to display large amounts of data.

What are react-virtualized's main functionalities?

List

The List component allows you to render large lists of items efficiently. It only renders the rows that are currently visible to the user, based on the scroll position.

{"import { List } from 'react-virtualized';

function MyList({ list }) {
  return (
    <List
      width={300}
      height={300}
      rowCount={list.length}
      rowHeight={20}
      rowRenderer={({ index, key, style }) => (
        <div key={key} style={style}>
          {list[index]}
        </div>
      )}
    />
  );
}"}

Table

The Table component is used for rendering large data sets in a tabular format. Similar to List, it only renders the rows that are visible in the viewport.

{"import { Column, Table } from 'react-virtualized';

function MyTable({ list }) {
  return (
    <Table
      width={1000}
      height={300}
      headerHeight={20}
      rowHeight={30}
      rowCount={list.length}
      rowGetter={({ index }) => list[index]}
    >
      <Column label='Name' dataKey='name' width={100} />
      <Column label='Age' dataKey='age' width={200} />
    </Table>
  );
}"}

Grid

The Grid component can render a virtualized grid of cells, which is useful for displaying data in a spreadsheet-like format. It renders only the cells that are currently in the viewport.

{"import { Grid } from 'react-virtualized';

function MyGrid({ columnCount, rowCount }) {
  return (
    <Grid
      columnCount={columnCount}
      columnWidth={100}
      height={300}
      rowCount={rowCount}
      rowHeight={30}
      width={300}
      cellRenderer={({ columnIndex, key, rowIndex, style }) => (
        <div key={key} style={style}>
          {`R${rowIndex}, C${columnIndex}`}
        </div>
      )}
    />
  );
}"}

InfiniteLoader

The InfiniteLoader component works with List, Table, or Grid to load more items as the user scrolls. It's useful for implementing 'infinite scroll' features where more data is fetched as needed.

{"import { InfiniteLoader, List } from 'react-virtualized';

function MyInfiniteList({ list, loadMoreRows }) {
  const isRowLoaded = ({ index }) => !!list[index];

  return (
    <InfiniteLoader
      isRowLoaded={isRowLoaded}
      loadMoreRows={loadMoreRows}
      rowCount={list.length}
    >
      {({ onRowsRendered, registerChild }) => (
        <List
          ref={registerChild}
          onRowsRendered={onRowsRendered}
          width={300}
          height={300}
          rowCount={list.length}
          rowHeight={20}
          rowRenderer={({ index, key, style }) => (
            <div key={key} style={style}>
              {list[index]}
            </div>
          )}
        />
      )}
    </InfiniteLoader>
  );
}"}

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Package last updated on 17 Apr 2023

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