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3.7 KiB
3.7 KiB
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zh-CN
通过 react-window
引入虚拟滚动方案,实现 100000 条数据的高性能表格。
en-US
Integrate virtual scroll with react-window
to achieve a high performance table of 100,000 data.
import React, { useState, useEffect, useRef } from 'react';
import { VariableSizeGrid as Grid } from 'react-window';
import ResizeObserver from 'rc-resize-observer';
import classNames from 'classnames';
import { Table } from 'antd';
function VirtualTable(props) {
const { columns, scroll, className } = props;
const [tableWidth, setTableWidth] = useState(0);
const widthColumnCount = columns.filter(({ width }) => !width).length;
const mergedColumns = columns.map(column => {
if (column.width) {
return column;
}
return {
...column,
width: Math.floor(tableWidth / widthColumnCount),
};
});
const gridRef = useRef<any>();
const [connectObject] = useState<any>(() => {
const obj = {};
Object.defineProperty(obj, 'scrollLeft', {
get: () => null,
set: (scrollLeft: number) => {
if (gridRef.current) {
gridRef.current.scrollTo({ scrollLeft });
}
},
});
return obj;
});
const resetVirtualGrid = () => {
gridRef.current.resetAfterIndices({
columnIndex: 0,
shouldForceUpdate: false,
});
};
useEffect(() => resetVirtualGrid, []);
useEffect(() => resetVirtualGrid, [tableWidth]);
const renderVirtualList = (rawData: object[], { scrollbarSize, ref, onScroll }: any) => {
ref.current = connectObject;
return (
<Grid
ref={gridRef}
className="virtual-grid"
columnCount={mergedColumns.length}
columnWidth={index => {
const { width } = mergedColumns[index];
return index === mergedColumns.length - 1 ? width - scrollbarSize - 1 : width;
}}
height={scroll.y}
rowCount={rawData.length}
rowHeight={() => 54}
width={tableWidth}
onScroll={({ scrollLeft }) => {
onScroll({ scrollLeft });
}}
>
{({ columnIndex, rowIndex, style }) => (
<div
className={classNames('virtual-table-cell', {
'virtual-table-cell-last': columnIndex === mergedColumns.length - 1,
})}
style={style}
>
{rawData[rowIndex][mergedColumns[columnIndex].dataIndex]}
</div>
)}
</Grid>
);
};
return (
<ResizeObserver
onResize={({ width }) => {
setTableWidth(width);
}}
>
<Table
{...props}
className={classNames(className, 'virtual-table')}
columns={mergedColumns}
pagination={false}
components={{
body: renderVirtualList,
}}
/>
</ResizeObserver>
);
}
// Usage
const columns = [
{ title: 'A', dataIndex: 'key', width: 150 },
{ title: 'B', dataIndex: 'key' },
{ title: 'C', dataIndex: 'key' },
{ title: 'D', dataIndex: 'key' },
{ title: 'E', dataIndex: 'key', width: 200 },
{ title: 'F', dataIndex: 'key', width: 100 },
];
const data = [];
for (let i = 0; i < 100000; i += 1) {
data.push({
key: i,
});
}
ReactDOM.render(
<VirtualTable columns={columns} dataSource={data} scroll={{ y: 300, x: '100vw' }} />,
mountNode,
);