Reading from TSV - date (dd-MON-yy) comes through as integer

Lines in TSV look like (see e-mail for full file) (and yes, this is fake data):

1	Emily	Fisher	[e-mail]	Female	161.31.81.163	89.64	15-NOV-2015	29-JAN-2016	89.62
2	Justin	Shaw	[e-mail]	Male	20.170.71.46	90.5	21-JUL-2016	28-MAR-2016	41.77

Doing a simple:

  let wb = XLSX.readFile('./local/input/tsv/SHORT_MOCK.txt', {
    FS: '\t',
    cellDates: true
  })
  XLSX.writeFile(wb, 'tsv.SHORT_MOCK.xlsx')

And my excel sheet dates look like:

[SheetJSDev]

Hmm My reading of the spec suggests that writing a date in XLSX would automatically imply the general date format. I guess not. That will be fixed in the next release

[SheetJSDev]

We just pushed 0.10.0. This version addresses most of the points here and you should see reasonable results. However, we are not done here.

The missing feature is preserving the original date format when reading the CSV (detecting that “15-NOV-2015” is actually of the form dd-mmm-yyyy) and we need an eversion of the SSF formatting process. Keep open for now