Free-form "custom" fields? #83 Follow-up

[astrotuna201]

          Dear RSI Team, many thanks for this wonderful library!

This answer is partially solving the same question I had. This seems to work, but (maybe due to my lack of understanding of react) still has the problem that the additional columns do not appear in the drop down buttons to assign columns. I can work around this by manually reading the extra column entries and manipulating "return data" to return a modified data array. But is there a way to update the available Column options to assign these extra columns? In my example (picture), all columns up to and including "Depth (mcd)" are original field entries; the remaining 4 columns are supposed to be assignable under their name dynamically. Many thanks!

Originally posted by @astrotuna201 in https://github.com/UgnisSoftware/react-spreadsheet-import/issues/83#issuecomment-1729065636