@mui/x-data-grid-premium/esm/hooks/features/export/serializer/setupExcelExportWebWorker.js

The Premium plan edition of the MUI X Data Grid Components.

import { addColumnGroupingHeaders, addSerializedRowToWorksheet, createValueOptionsSheetIfNeeded, getExcelJs } from "./utils.js";
export function setupExcelExportWebWorker(workerOptions = {}) {
  globalThis.addEventListener('message', async event => {
    const {
      namespace,
      serializedColumns,
      serializedRows,
      options,
      valueOptionsSheetName,
      valueOptionsData,
      columnGroupDetails,
      columnGroupPaths
    } = event.data;

    // workers share the pub-sub channel namespace. Use this property to filter out messages.
    if (namespace !== 'mui-x-data-grid-export') {
      return;
    }
    const {
      exceljsPostProcess,
      exceljsPreProcess
    } = workerOptions;
    const excelJS = await getExcelJs();
    const workbook = new excelJS.Workbook();
    const worksheet = workbook.addWorksheet('Sheet1');
    worksheet.columns = serializedColumns;
    if (exceljsPreProcess) {
      await exceljsPreProcess({
        workbook,
        worksheet
      });
    }
    if (options.includeColumnGroupsHeaders) {
      addColumnGroupingHeaders(worksheet, serializedColumns, columnGroupPaths, columnGroupDetails);
    }
    const includeHeaders = options.includeHeaders ?? true;
    if (includeHeaders) {
      worksheet.addRow(serializedColumns.map(column => column.headerText));
    }
    createValueOptionsSheetIfNeeded(valueOptionsData, valueOptionsSheetName, workbook);
    serializedRows.forEach(serializedRow => {
      addSerializedRowToWorksheet(serializedRow, worksheet);
    });
    if (exceljsPostProcess) {
      await exceljsPostProcess({
        workbook,
        worksheet
      });
    }
    postMessage(await workbook.xlsx.writeBuffer());
  });
}