How to make HTML table expand on click?

function format(number, decimals = 2, locale = 'en-in') {
  const fixed = parseInt(number).toFixed(decimals);
  const [int, dec] = fixed.split('.')
  const intFormatted = (+int).toLocaleString(locale)
  return intFormatted + (dec ? '.' + dec : '');
}
var data = [{
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Khara Boondhi-L",
    "transactionType": "TransferIn",
    "netamount": 980
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Samosa-L",
    "transactionType": "TransferIn",
    "netamount": 130
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Corn Flakes Masala-L",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Plum Cake 250gm",
    "transactionType": "TransferIn",
    "netamount": 110
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Butterscotch Cake",
    "transactionType": "TransferIn",
    "netamount": 720
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Chocolate chips cake",
    "transactionType": "TransferIn",
    "netamount": 40000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Mango Delight Cake",
    "transactionType": "TransferIn",
    "netamount": 14000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Almond Honey Chocolate Cake",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Peach Cake",
    "transactionType": "TransferIn",
    "netamount": 5500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Black Forest Cake",
    "transactionType": "TransferIn",
    "netamount": 1000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Chocolate Crazy Boom",
    "transactionType": "TransferIn",
    "netamount": 2360
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Hot Chocolate Fudge",
    "transactionType": "TransferIn",
    "netamount": 2340
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Chocolate Sugar Free Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 1000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Kesar Badam Falooda",
    "transactionType": "TransferIn",
    "netamount": 4430
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Strawberry Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 1231
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Chocochips",
    "transactionType": "TransferIn",
    "netamount": 2200
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cheese Cake Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Sundae Large",
    "transactionType": "TransferIn",
    "netamount": 2350
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Mango Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 8000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Shooting Star",
    "transactionType": "TransferIn",
    "netamount": 2360
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Ice Blue Sundae",
    "transactionType": "TransferIn",
    "netamount": 2340
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Creamy Litchi Boom",
    "transactionType": "TransferIn",
    "netamount": 2200
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cookies Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 7000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Wafer",
    "transactionType": "TransferIn",
    "netamount": 88000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Litchi cherry Sundae",
    "transactionType": "TransferIn",
    "netamount": 2440
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Peach Malaba",
    "transactionType": "TransferIn",
    "netamount": 2230
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cherry Mania Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 2700
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "North Indian FG",
    "itemname": "Fruit Mixture",
    "transactionType": "TransferIn",
    "netamount": 324
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 476426
  },
  {
    "outlet": "KOLAR",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 115313
  },
  {
    "outlet": "MALLESHWARAM",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 92141
  }
]
let formatData = function(data) {
  let brandnames = [];
  let itemnames = [];
  let outlets = [];
  data.forEach(element => {
    if (brandnames.indexOf(element.brandname) == -1 && (element.brandname) !== "NA") { //taking brandname which do not have bradname===NA
      brandnames.push(element.brandname);
    }
    if (itemnames.indexOf(element.itemname) == -1 && (element.itemname) !== "NA") { //taking itemname which do not have bradname===NA
      itemnames.push(element.itemname);
    }
    if (outlets.indexOf(element.outlet) == -1) {
      outlets.push(element.outlet);
    }
  });
  return {
    data: data,
    brandnames: brandnames,
    itemnames: itemnames,
    outlets: outlets,
  };
};
var totalSalesPercentage = '';
var olWiseSalesPercentage = '';
let renderTable = function(data) {
  brandnames = data.brandnames;
  itemnames = data.itemnames;
  outlets = data.outlets;
  data = data.data;
  let tbl = document.getElementById("ConsumptionTable");
  let table = document.createElement("table");
  let thead = document.createElement("thead");
  let headerRow = document.createElement("tr");
  let th = document.createElement("th");

  th = document.createElement("th");
  th.innerHTML = "Brand Name";
  th.classList.add("text-center");
  headerRow.appendChild(th);

  let grandTotal = 0;
  let grandNetAmount = 0;
  let outletWiseTotal = {};
  let outletWiseNetamount = {};
  th = document.createElement("th");
  th.colSpan = 2;
  th.innerHTML = "Total";
  th.classList.add("text-center");
  headerRow.appendChild(th);

  outlets.forEach(element => {

    th = document.createElement("th");
    th.colSpan = 2;
    th.innerHTML = element; // populating outlet 
    th.classList.add("text-center");
    headerRow.appendChild(th);
    outletWiseTotal[element] = 0;
    data.forEach(el => {
      if (el.outlet == element && el.brandname !== "NA") { //taking brandname which do not have bradname===NA
        outletWiseTotal[element] += parseInt(el.netamount); //here i am calculating the outletWiseTotal where transcationType==TransferIn

      }
      if (el.outlet == element && el.brandname == "NA" && el.transactionType == "Sales") { //taking brandname which do not have bradname===NA
        outletWiseNetamount[element] = parseInt(el.netamount) || 0


      }

    });
    console.log(outletWiseTotal)
    grandTotal += outletWiseTotal[element]; //then calculating grand total to populate it into  Total column at grn entery

    grandNetAmount += outletWiseNetamount[element] || 0

  });

  thead.appendChild(headerRow);
  headerRow = document.createElement("tr");
  th = document.createElement("th");
  th.innerHTML = "";
  headerRow.appendChild(th);

  for (i = 0; i < outlets.length + 1; i++) {
    th = document.createElement("th");
    th.innerHTML = "Sales";
    th.classList.add("text-center");
    headerRow.appendChild(th);

    th = document.createElement("th");
    th.innerHTML = "Grn Entery";
    th.classList.add("text-center");
    headerRow.appendChild(th);
  }

  headerRow.insertBefore(th, headerRow.children[1]);
  thead.appendChild(headerRow);
  table.appendChild(thead);

  headerRow = document.createElement("tr");
  td = document.createElement("th");
  td.innerHTML = "Total";
  td.classList.add("text-center");
  headerRow.appendChild(td);
  let el1 = 0;
  outlets.forEach(element => {

    td = document.createElement("th");
    td.innerHTML = outletWiseTotal[element].toLocaleString('en-IN');
    td.classList.add("text-right");
    headerRow.appendChild(td);
    if (element.outlet == element) {
      el1 = element.netAmount;
    }
    td = document.createElement("th");
    td.innerHTML = outletWiseNetamount[element].toLocaleString('en-IN') || 0;
    td.classList.add("text-right");
    headerRow.appendChild(td);

  });
  td = document.createElement("th");
  td.innerHTML = grandNetAmount.toLocaleString('en-IN');
  td.classList.add("text-right");
  headerRow.insertBefore(td, headerRow.children[1]);

  td = document.createElement("th");
  td.innerHTML = grandTotal.toLocaleString('en-IN');
  td.classList.add("text-right");
  headerRow.insertBefore(td, headerRow.children[1]);
  thead.appendChild(headerRow);
  table.appendChild(thead);

  let tbody = document.createElement("tbody");
  brandnames.forEach(element => {
    let row = document.createElement("tr");

    td = document.createElement("td");
    td.innerHTML = '<span onclick="expand(this)"><i class="fas fa-plus" id="test"></i>&nbsp</span>' + " " + element; //creating plus font icon to make click happen

    row.appendChild(td);
    let total = 0;
    let totalBCount = 0;
    outlets.forEach(outlet => {
      let el = 0;
      let bc = 0;
      data.forEach(d => {
        if (d.brandname == element && d.outlet == outlet) {
          total += parseInt(d.netamount);
          el = d.netamount;
          console.log(el) //this one is populating ful data here
        }
      });
      console.log(el) //but here it is not taking cumulative sum of netamount it is only taking one amount of each brand 
      olWiseSalesPercentage = (el / outletWiseTotal[outlet]) * 100 || 0 //here doing some calculations
      td = document.createElement("td");
      td.innerHTML = el.toLocaleString('en-IN');

      td.classList.add("text-right");
      row.appendChild(td);
      td = document.createElement("td");
      td.innerHTML = olWiseSalesPercentage.toFixed(2) + "%";

      td.classList.add("text-right");
      row.appendChild(td);
    });
    totalSalesPercentage = (total / grandTotal) * 100 //here doing some calculations
    const totalSalesPercentageFix = totalSalesPercentage.toFixed(2) + "%"
    td = document.createElement("td");
    td.innerHTML = totalSalesPercentageFix;
    td.classList.add("text-right");
    row.insertBefore(td, row.children[1]);

    td = document.createElement("td");
    td.innerHTML = total.toLocaleString('en-IN');
    td.classList.add("text-right");
    row.insertBefore(td, row.children[1]);
    tbody.appendChild(row);
  });
  table.appendChild(tbody);
  tbl.innerHTML = "";
  tbl.appendChild(table);
  table.classList.add("table");
  table.classList.add("table-striped");
  table.classList.add("table-bordered");
  table.classList.add("table-hover");

}
let formatedData = formatData(data);
renderTable(formatedData);

function expand(e) {
  let itemsRow = document.querySelectorAll('.itemsRow');
  if(itemsRow){
    itemsRow.forEach(v => v.style.display = 'none')
  }
    let list = e.parentNode.children;
    for (v of list){
      if(v.nodeName === 'TABLE'){
      v.style.display = '';
      return
    }
    }
 

  let brand = e.parentNode.innerHTML.substr(e.parentNode.innerHTML.lastIndexOf('>')+1).trim()
  let table = document.createElement("table");
  table.classList.add("itemsRow");
  let tbody = document.createElement("tbody");

  let brandNames = data.filter(v => v.brandname === brand)
  
  brandNames.forEach(element => {
    let row = document.createElement("tr");
    for (let property in element) {
          td = document.createElement("td"); 
          td.classList.add("items");
          td.innerHTML = element[property];
         row.appendChild(td)
  }

    tbody.appendChild(row)
  });
  table.appendChild(tbody);
  e.parentNode.appendChild(table);
}

#test {
  color: green;
  cursor: pointer;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css">
<div align="center" class="table table-responsive">
  <table id="ConsumptionTable"></table>
</div>

class CellEntry {
  constructor() {
    this.sum = 0;
    this.percentage = 0;
  }
}

class OutletBasedRowEntry {
  constructor() {
    this.cells = {
      Total: new CellEntry()
    };
    this.childRows = {};
  }
  add(entry) {
    this.cells.Total.sum += entry.netamount;
    this.getOrCreateCellById(entry.outlet).sum += entry.netamount;
  }
  getOrCreateChildRowById(id) {
    if (!this.childRows[id]) this.childRows[id] = new OutletBasedRowEntry();
    return this.childRows[id];
  }
  getOrCreateCellById(id) {
    if (!this.cells[id]) this.cells[id] = new CellEntry();
    return this.cells[id];
  }
}

function tabulizeData(data) {
  let TotalRowEntry = new OutletBasedRowEntry();
  data.forEach(entry => {
    TotalRowEntry.add(entry);
    TotalRowEntry.getOrCreateChildRowById(entry.brandname).add(entry);
    TotalRowEntry.getOrCreateChildRowById(entry.brandname).getOrCreateChildRowById(entry.itemname).add(entry);
  });
  renderTable(TotalRowEntry);
}

function renderTable(TotalRowEntry) {
  let $table = $('#ConsumptionTable');
  let $thead = $('<thead><tr><th>Brand Name</th></tr><tr><th></th></tr><tr><th>Total</th></tr><thead>'),
    $tbody = $('<tbody>');
  let $headingRows = $thead.find('tr');

  function addCellEntriesToRow(rowEntry, $row) {
    for (let cellName in TotalRowEntry.cells) {
      let cellEntry = rowEntry.getOrCreateCellById(cellName);
      $('<td>').html(cellEntry.sum).appendTo($row);
      $('<td>').html(cellEntry.percentage).appendTo($row);
    }
  }

  $.each(TotalRowEntry.cells, function(cellName, cellEntry) {
    $('<th colspan=2>').html(cellName).appendTo($headingRows.eq(0));
    $('<th>Grn Entery</th>').appendTo($headingRows.eq(1));
    $('<th>Sales</th>').appendTo($headingRows.eq(1));
    $('<th>').html(cellEntry.sum).appendTo($headingRows.eq(2));
    $('<th>').html(cellEntry.percentage).appendTo($headingRows.eq(2));
  });

  $.each(TotalRowEntry.childRows, function(brandName, rowEntry) {
    let $row = $('<tr>').appendTo($tbody);
    let rowId = 'row' + $row.index();
    let firstCell = $('<td><i class="fas fa-plus add-btn" data-toggle="collapse" data-target=".' + rowId + '"></i>' + brandName + '</td>').appendTo($row);
    addCellEntriesToRow(rowEntry, $row);
    $.each(rowEntry.childRows, function(itemName, rowEntry) {
      $row = $('<tr>').addClass('collapse ' + rowId).appendTo($tbody);
      $('<td>').html(itemName).appendTo($row);
      addCellEntriesToRow(rowEntry, $row);
    });
  });

  $thead.appendTo($table);
  $tbody.appendTo($table);
}

tabulizeData([{
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Khara Boondhi-L",
    "transactionType": "TransferIn",
    "netamount": 980
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Samosa-L",
    "transactionType": "TransferIn",
    "netamount": 130
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Bakery FG",
    "itemname": "Corn Flakes Masala-L",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Plum Cake 250gm",
    "transactionType": "TransferIn",
    "netamount": 110
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Butterscotch Cake",
    "transactionType": "TransferIn",
    "netamount": 720
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Chocolate chips cake",
    "transactionType": "TransferIn",
    "netamount": 40000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Mango Delight Cake",
    "transactionType": "TransferIn",
    "netamount": 14000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Almond Honey Chocolate Cake",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Peach Cake",
    "transactionType": "TransferIn",
    "netamount": 5500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Pastry & Cake FG",
    "itemname": "Black Forest Cake",
    "transactionType": "TransferIn",
    "netamount": 1000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Chocolate Crazy Boom",
    "transactionType": "TransferIn",
    "netamount": 2360
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Hot Chocolate Fudge",
    "transactionType": "TransferIn",
    "netamount": 2340
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Chocolate Sugar Free Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 1000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Kesar Badam Falooda",
    "transactionType": "TransferIn",
    "netamount": 4430
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Strawberry Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 1231
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Chocochips",
    "transactionType": "TransferIn",
    "netamount": 2200
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cheese Cake Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 500
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Sundae Large",
    "transactionType": "TransferIn",
    "netamount": 2350
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Mango Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 8000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Shooting Star",
    "transactionType": "TransferIn",
    "netamount": 2360
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Ice Blue Sundae",
    "transactionType": "TransferIn",
    "netamount": 2340
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Creamy Litchi Boom",
    "transactionType": "TransferIn",
    "netamount": 2200
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cookies Ice-cream",
    "transactionType": "TransferIn",
    "netamount": 7000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "TOP- Wafer",
    "transactionType": "TransferIn",
    "netamount": 88000
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Litchi cherry Sundae",
    "transactionType": "TransferIn",
    "netamount": 2440
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Peach Malaba",
    "transactionType": "TransferIn",
    "netamount": 2230
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "Ice Cream FG",
    "itemname": "Cherry Mania Ice-Cream",
    "transactionType": "TransferIn",
    "netamount": 2700
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "North Indian FG",
    "itemname": "Fruit Mixture",
    "transactionType": "TransferIn",
    "netamount": 324
  },
  {
    "outlet": "JAYANAGAR",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 476426
  },
  {
    "outlet": "KOLAR",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 115313
  },
  {
    "outlet": "MALLESHWARAM",
    "brandname": "NA",
    "itemname": "NA",
    "transactionType": "Sales",
    "netamount": 92141
  }
]);

.add-btn {
  color: green;
  cursor: pointer;
  margin-right: 6px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css">
<div align="center" class="table table-responsive">
  <table id="ConsumptionTable" class="table table-responsive table-hover table-bordered"></table>
</div>