React -从excel文件中读取日期

import XLSX from 'xlsx';
import { saveAs } from 'file-saver';

const fileReader = new FileReader();
fileReader.onload = (event) => {
  const data = new Uint8Array(event.target.result);
  const workbook = XLSX.read(data, { type: 'array' });
  const sheetName = workbook.SheetNames[0];
  const worksheet = workbook.Sheets[sheetName];
  const excelData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
  // 处理读取到的日期数据
};
fileReader.readAsArrayBuffer(file);

const newWorkbook = XLSX.utils.book_new();
const newWorksheet = XLSX.utils.aoa_to_sheet(processedData);
XLSX.utils.book_append_sheet(newWorkbook, newWorksheet, 'Sheet1');
const excelBuffer = XLSX.write(newWorkbook, { type: 'array', bookType: 'xlsx' });
const blob = new Blob([excelBuffer], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
saveAs(blob, 'processed_data.xlsx');