ExcelJS. Can i create sublevels with this Lib?

Question

Grouping with XLSX writer on Node JS Is it possible to repeat such grouping with ExcelJS?

I found an example on codepen, but the grouping is not the one I need. Is it possible to somehow modify this code to get a multilevel grouping? Or tell me another library (namely CDN), which I can use to make such a grouping like on screen.

function RunExcelJSExport() {
  let data = [
    {
      'salesman-name': "Jim Smith",
      sales: 12345,
      uri: "https://www.google.com",
      'met target': true,
      status: "Employee",
      dob: new Date(Date.UTC(1950, 0, 1, 0, 0, 0)),
      level: 1.1,
      comments:
        "This is a <b>longish</b> string of text that is intended to show wrapping. The width of the column is set to 30 so the text can&apos;t fit. It also includes some HTML that will be <i>removed</i> and HTML character encodings that will be <i>replaced</i> before export&#33;&#33;"
    },
    {
      'salesman-name': "Mark Thompson",
      sales: 1200,
      'met target': false,
      status: "Employee",
      dob: new Date(Date.UTC(1961, 11, 24, 0, 0, 0)),
      level: 1.3,
      comments: ''
    },
    {
      'salesman-name': "Susan Hamilton",
      sales: 67001,
      'met target': true,
      status: "Freelance",
      dob: new Date(Date.UTC(1970, 5, 6, 0, 0, 0)),
      level: 1.0
    },
    {
      'salesman-name': "Ian Hepburn",
      sales: -500,
      'met target': false,
      status: "Freelance",
      dob: new Date(Date.UTC(1972, 2, 23, 0, 0, 0)),
      level: 1.0
    },
    {
      'salesman-name': "Michael McMichaels",
      sales: 34124,
      'met target': true,
      status: "Employee",
      dob: new Date(Date.UTC(1980, 0, 9, 0, 0, 0)),
      level: 3.2
    }
  ];
  
  
  let wb = new ExcelJS.Workbook();
  let workbookName = "Sample Workbook Generated by ExcelJS.xlsx";
  let worksheetName = "Demo Worksheet";
  let worksheetName2 = "2nd Demo Worksheet";
  let ws = wb.addWorksheet(worksheetName, 
    {
      properties: {
        tabColor: {argb:'FFFF0000'}
      }
    }
  );
  let ws2 = wb.addWorksheet(worksheetName2);


  ws.columns = [
    { 
      key: "salesman-name", 
      header: "Salesman-Name", 
      width: 20 
    },
    {
      key: "sales",
      header: "Sales",
      width: 15,
      style: { numFmt: '"£"#,##0.00;[Red]-"£"#,##0.00' }
    },
    { 
      key: "uri", 
      header: "URI", 
      width: 30,
      outlineLevel: 1 ,
      hidden: false
    },
    {
      key: "met target",
      header: "Met Target?",
      width: 12,
      style: {
        alignment: { horizontal: "center" },
        font: { color: { argb: "008000" } }
      }
    },
    { 
      key: "status", 
      header: "Status" 
    },
    {
      key: "dob",
      header: "Date of Birth",
      width: 12,
      style: { numFmt: "dd/mm/yyyy" }
    },
    {
      key: "level",
      header: "Level",
      width: 5,
      style: { numFmt: "0.0" }
    },
    {
      key: "comments",
      header: "Comments",
      width: 30,
      style: { alignment: { wrapText: true }, numFmt: '@' },
      outlineLevel: 1 ,
      hidden: false
    },
    {
      key: "dob_linked",
      header: "Date of Birth (Linked and Formatted)",
      width: 35,
      style: { numFmt: "dddd, MMMM dd, yyyy" },
      outlineLevel: 2,
      hidden: false
    },
    
  ];

  ws.getRow(1).font = { bold: true };
  ws.getCell("B1").alignment = { horizontal: "right" };
  ws.getCell('F1').alignment = { textRotation: 90 };
  ws.views = [{ state: "frozen", ySplit: 1 }];

  ws.addRows(data);

  ws.getCell("C2").value = {
    text: "www.google.com",
    hyperlink: "http://www.google.com",
    tooltip: "Click to go to google.com"
  };
  ws.getCell("C2").font = {
    color: { argb: "0000FF" },
    underline: true
  };

  let totCell = "B" + (data.length + 2);
  let totFormula = "SUM(B2:B" + (data.length + 1) + ")";
  ws.getCell(totCell).value = { formula: totFormula };
  ws.getCell(totCell).border = {
    top: { style: "thin" },
    bottom: { style: "double" }
  };
  // We can name this cell to make it easier to reference later
  ws.getCell(totCell).name = 'salestotal';
  

  let col = ws.getColumn("D");
  col.eachCell(function(cell, rowNumber) {
    if (rowNumber > 1) {
      if (cell.value) {
        cell.value = "\u2713";
      } else {
        cell.value = null;
      }
    }
  });

  col = ws.getColumn("E");
  col.eachCell(function(cell, rowNumber) {
    if (rowNumber > 1) {
      cell.dataValidation = {
        type: "list",
        allowBlank: false,
        formulae: ['"Employee,Freelance"']
      };
    }
  });
  
  
  col = ws.getColumn("F");
  col.eachCell(function(cell, rowNumber) {
    if (rowNumber > 1) {
      cell.dataValidation = {
        type: 'date',
        operator: 'lessThan',
        showErrorMessage: true,
        allowBlank: false,
        formulae: [new Date(1981,1,1)],
        errorStyle: 'error',
        errorTitle: 'Date is too soon!',
        error: 'The dob value must be before 01/01/1981'
      };
    }
  });
  
  // Remove all HTML from the comments field
  col = ws.getColumn("H");
  col.eachCell(function(cell, rowNumber) {
    if (cell.value !== null && String(cell.value).trim() !== '') {
      let doc = new DOMParser().parseFromString(cell.value, "text/html");
      cell.value = doc.documentElement.textContent;
    }
  });
  
  
  col = ws.getColumn("I");
  col.eachCell(function(cell, rowNumber) {
    if (rowNumber > 1) {
      cell.value = {formula: 'F' + rowNumber};
    }
  });
 

  // Reference cell by rownum, colnum
  ws.getCell(5,1).fill = {
    type: "pattern",
    pattern: "solid",
    fgColor: { argb: "F3FF33" }
  };
  
  

  ws.getCell("G4").value = {
    richText: [
      { text: "This " },
      { font: { italic: true }, text: "is" },
      {
        font: {
          size: 14,
          color: { argb: "FF00FF00" },
          bold: true
        },
        text: "rich"
      },
      { font: { underline: true }, text: " text!" }
    ]
  };
  

  // Merge cells
  ws.mergeCells('A15:I17');
  ws.getCell('A15').style = {
    font: {
      size: 20,
      bold: true
    },
    alignment: {
      horizontal: 'center', 
      vertical: 'middle',
      wrapText: true
    }
  };
  ws.getCell('A15').value = 'This is merged cells (A15:I17), with large bold text, vertically and horizontally aligned';
  
  ws.getRow(15).outlineLevel = 1;
  ws.getRow(16).outlineLevel = 1;
  ws.getRow(17).outlineLevel = 1;
  
  
  ws.getColumn('I').hidden = true;
  ws.getRow(4).hidden = true;
  
  
  // Retrieve a named cell value from another worksheet
  ws2.getColumn('A').width = 25;
  ws2.getCell('A3').value = 'Value from 1st sheet:';
  ws2.getCell('B3').value = { formula: 'salestotal' };
  
  
  console.log(ws.getRow(5).getCell(9)._address);
  
    
  
  wb.xlsx.writeBuffer()
    .then(function(buffer) {
      saveAs(
        new Blob([buffer], { type: "application/octet-stream" }),
        workbookName
      );
  });
  
  
}

<input type="button" value="Export to Excel" onclick="RunExcelJSExport()"></input>