excel de exportación de nodejs

const xlsx = require('xlsx');
let wb = xlsx.utils.book_new();
xlsx.utils.book_append_sheet(wb, xlsx.utils.json_to_sheet([{ a: 1, b: 2 }, { a: 3, b: 4 }]), 'a');
xlsx.utils.book_append_sheet(wb, xlsx.utils.aoa_to_sheet([['a', 'b', 'c'], [4, 5, 6]]), 'b');
xlsx.writeFile(wb, path);

const fs = require('fs');
const fastcsv = require('fast-csv');
let stream = fs.createWriteStream(path);
let csvStream = fastcsv.format({ headers: true });
csvStream.pipe(stream);
for (let i = 0; i < 5; i++) csvStream.write({ a: i, b: i + '\t' });
csvStream.end(() => console.log(1));