Setting the BOM on write

Hi, we use the npm module to create csv exports and are generally very happy, however we still have the issue with utf-8 encoding, that excel does not recognise the files as utf-8 immediately.

According to: http://stackoverflow.com/questions/155097/microsoft-excel-mangles-diacritics-in-csv-files adding the BOM would be the quickest fix. Is there a way to add this to the stream. Our code looks like this (we use express.js):

const csvOptions = {
            headers: true,
            delimiter: ';',
            transform: function(entry) {
//do stuff
            }
          };
          response.set('Content-Type', 'text/csv; charset=utf-8');
          response.set('Content-Disposition', 'attachment; filename="export.csv"');
          csv.write(transactions, csvOptions).pipe(response);

If there is no way to do it, an option would be amazing to set the BOM. Thx in advance.

[doug-martin]

Added in v3.4.0 there is a new option called writeBOM that you can set to true to have the BOM character written.

[bizarrochris]

Thank you for the options - will check them out asap. However, having a BOM in the options, and adding the BOM to the document in the background) would still make a lot of sense inmho.