outlineLevelRow is broken

Hi,

I am successfully using outline levels in my project to dynamically hide excel rows. However I would like these rows to be collapsed by default. I have attempted to do this by setting the outlineLevelRow property. A short demo is shown below.

The issue is that when I execute the below demo and open test.xlsx in Excel 2016, none of the rows are collapsed by default.

Can anyone confirm that this is an issue? I looked a the source code, but there is very little dynamic behavior behind outlineLevelRow, and it may be an issue with Excel 2016.

let Excel = require("exceljs");

let wb = new Excel.Workbook();
let ws = wb.addWorksheet();

ws.properties.outlineLevelRow = 1;

ws.addRow(["one"]);
ws.lastRow.outlineLevel = 0;
ws.addRow(["two"]);
ws.lastRow.outlineLevel = 1;
ws.addRow(["three"]);
ws.lastRow.outlineLevel = 2;

wb.xlsx.writeFile("./test.xlsx");

[dmnorc]

Hi, you can make it collapsed by default with row.hidden = true

[andreyevyk]

Any solution?