ExcelJS: doesn't save file properly - exceljs

Question

I wrote an script and here's an snippet from my code:
let workbook = new Excel.Workbook();
await workbook.xlsx.readFile('./input.xlsx');
await workbook.xlsx.writeFile('./output.xlsx');
console.log('file saved!');
I know how async/await works and there is no error!
the input.xlsx is a valid excel file. but the output.xlsx can't be opened by libreOffice or Microsoft Excel.
I should notice that if I comment await workbook.xlsx.readFile('./input.xlsx');, in this situation also the output.xlsx can't be read too!
It's an strange issue for me! I used exceljs many many times but I don't know why it's happening now!
exceljs version: 3.9.0

Answer 1

I suppose that exceljs hasn't implemented at least one feature used in input.xlsx.
Similar situation I had with images some times ago and fixed by PR: https://github.com/exceljs/exceljs/pull/702
Could I ask you to create an issue on GH?
If you want to find what exactly went wrong:
unzip input.xlsx
unzip output.xlsx
check diff between.
You can also upload input.xlsx here, it should help to find a bug reason.
I think also, check any other version of exceljs may be helpful.