Formulae not retained on export

When a worksheet has cells with valid .f properties (formula), the value is not retained during exporting to XLSX format via:

var workbook = workbook = Xlsx.readFile('OnDemand.xlsx', { 
    cellFormula: true, 
    cellStyles: true, 
    sheetStubs: true, 
    cellNF: true, 
    bookDeps: true 
});
var out = Xlsx.write( workbook, { bookType: 'xlsx', /*bookSST: true,*/ type: 'binary' });

I need to support such functionality for the modification of templated workbooks. For example, the template has a cell, Q16 with the formula =IF(ISERROR((N16*M16*R16)/101.8),0,((N16*M16*R16)/101.8)). When output via the above code, the value “0” is produced instead.

No formula information is retained, and the cell is a “General” cell of value “0”. Is there a workaround or solution to this?

[ngehlert]

any update on when formulas will be supported or at least the xlsx patch from @mcsf will be merged?

[SheetJSDev]

We finally settled on a convention: for non-array formulae just setting the f key will export the formula. For array formulae, set the topleft corner cell’s F key to the array formula range. This works for range as well as point array formulae.

We updated the write test with an example