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a592dd897e
close #30284
164 lines
4.0 KiB
Markdown
164 lines
4.0 KiB
Markdown
---
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order: 30
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title:
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en-US: Virtual list
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zh-CN: 虚拟列表
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---
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## zh-CN
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通过 `react-window` 引入虚拟滚动方案,实现 100000 条数据的高性能表格。
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## en-US
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Integrate virtual scroll with `react-window` to achieve a high performance table of 100,000 data.
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```tsx
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import React, { useState, useEffect, useRef } from 'react';
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import { VariableSizeGrid as Grid } from 'react-window';
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import ResizeObserver from 'rc-resize-observer';
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import classNames from 'classnames';
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import { Table } from 'antd';
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function VirtualTable(props: Parameters<typeof Table>[0]) {
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const { columns, scroll } = props;
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const [tableWidth, setTableWidth] = useState(0);
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const widthColumnCount = columns!.filter(({ width }) => !width).length;
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const mergedColumns = columns!.map(column => {
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if (column.width) {
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return column;
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}
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return {
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...column,
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width: Math.floor(tableWidth / widthColumnCount),
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};
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});
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const gridRef = useRef<any>();
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const [connectObject] = useState<any>(() => {
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const obj = {};
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Object.defineProperty(obj, 'scrollLeft', {
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get: () => null,
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set: (scrollLeft: number) => {
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if (gridRef.current) {
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gridRef.current.scrollTo({ scrollLeft });
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}
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},
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});
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return obj;
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});
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const resetVirtualGrid = () => {
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gridRef.current.resetAfterIndices({
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columnIndex: 0,
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shouldForceUpdate: true,
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});
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};
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useEffect(() => resetVirtualGrid, [tableWidth]);
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const renderVirtualList = (rawData: object[], { scrollbarSize, ref, onScroll }: any) => {
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ref.current = connectObject;
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const totalHeight = rawData.length * 54;
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return (
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<Grid
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ref={gridRef}
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className="virtual-grid"
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columnCount={mergedColumns.length}
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columnWidth={(index: number) => {
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const { width } = mergedColumns[index];
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return totalHeight > scroll!.y! && index === mergedColumns.length - 1
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? (width as number) - scrollbarSize - 1
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: (width as number);
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}}
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height={scroll!.y as number}
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rowCount={rawData.length}
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rowHeight={() => 54}
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width={tableWidth}
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onScroll={({ scrollLeft }: { scrollLeft: number }) => {
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onScroll({ scrollLeft });
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}}
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>
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{({
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columnIndex,
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rowIndex,
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style,
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}: {
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columnIndex: number;
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rowIndex: number;
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style: React.CSSProperties;
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}) => (
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<div
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className={classNames('virtual-table-cell', {
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'virtual-table-cell-last': columnIndex === mergedColumns.length - 1,
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})}
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style={style}
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>
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{(rawData[rowIndex] as any)[(mergedColumns as any)[columnIndex].dataIndex]}
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</div>
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)}
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</Grid>
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);
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};
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return (
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<ResizeObserver
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onResize={({ width }) => {
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setTableWidth(width);
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}}
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>
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<Table
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{...props}
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className="virtual-table"
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columns={mergedColumns}
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pagination={false}
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components={{
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body: renderVirtualList,
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}}
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/>
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</ResizeObserver>
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);
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}
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// Usage
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const columns = [
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{ title: 'A', dataIndex: 'key', width: 150 },
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{ title: 'B', dataIndex: 'key' },
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{ title: 'C', dataIndex: 'key' },
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{ title: 'D', dataIndex: 'key' },
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{ title: 'E', dataIndex: 'key', width: 200 },
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{ title: 'F', dataIndex: 'key', width: 100 },
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];
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const data = Array.from({ length: 100000 }, (_, key) => ({ key }));
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ReactDOM.render(
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<VirtualTable columns={columns} dataSource={data} scroll={{ y: 300, x: '100vw' }} />,
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mountNode,
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);
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```
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<style>
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.virtual-table .ant-table-container:before,
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.virtual-table .ant-table-container:after {
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display: none;
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}
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.virtual-table-cell {
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box-sizing: border-box;
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padding: 16px;
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border-bottom: 1px solid #e8e8e8;
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background: #FFF;
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}
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[data-theme="dark"] .virtual-table-cell {
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box-sizing: border-box;
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padding: 16px;
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border-bottom: 1px solid #303030;
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background: #141414;
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}
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</style>
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