无法读取使用js-xlsx读取excel文件的空单元格

const XLSX = require('xlsx');

const workbook = XLSX.readFile('example.xlsx');
const worksheet = workbook.Sheets[workbook.SheetNames[0]];
const data = XLSX.utils.sheet_to_json(worksheet, { defval: '' });

console.log(data);

const XLSX = require('xlsx');
const fs = require('fs');

const workbook = XLSX.readFile('example.xlsx');
const worksheet = workbook.Sheets[workbook.SheetNames[0]];
const csvData = XLSX.utils.sheet_to_csv(worksheet);

fs.writeFileSync('example.csv', csvData);

// 然后使用其他方法读取example.csv文件