How to make HTML table expand on click?

Question

I am rendering HTML table with the help of JavaScript. I have made the table successfully, but now I have one requirement to show some new data in a row like on click expand

Answer 1

Do it this way, follow DRY and modular structure to keep it more readable and maintainable.

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 = $('Brand NameTotal'),
    $tbody = $('');
  let $headingRows = $thead.find('tr');

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

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

  $.each(TotalRowEntry.childRows, function(brandName, rowEntry) {
    let $row = $('').appendTo($tbody);
    let rowId = 'row' + $row.index();
    let firstCell = $('' + brandName + '').appendTo($row);
    addCellEntriesToRow(rowEntry, $row);
    $.each(rowEntry.childRows, function(itemName, rowEntry) {
      $row = $('').addClass('collapse ' + rowId).appendTo($tbody);
      $('').html(itemName).appendTo($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;
}