Need help with defining style on cell level

[adarshSrivastava01]

I have this code for my table, when I am defining the columns I want to have a property cellClassName which should allow me to add style for particular column's cells, something like:

const columns: ColumnDef<ManagedMarketplaceCorporation>[] = [
    {
      accessorKey: 'entityName',
      header: Entity
      cell: ({ row }) =>  <h5>{getCorporationName(row.original)}</h5>,
      cellClassName: 'bg-red-400 w-[500px]'
    },
    {
      accessorKey: 'accountantAvailability',
      header: 'Have an accountant already?',
      cell: ({ row }) => <h1>Yes</h1>,
    },
  ];

Is there a way I can achieve this, also adding the code for table

import React from 'react';

import {
  ColumnDef,
  flexRender,
  getCoreRowModel,
  getPaginationRowModel,
  useReactTable,
  SortingState,
  getSortedRowModel,
  ColumnFiltersState,
  getFilteredRowModel,
  VisibilityState,
} from '@tanstack/react-table';

import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from './base';

import { Button } from '../Button/button';

export interface PaginationConfigProps {
  isPaginated: boolean;
  pageRowCount: number;
}

export interface FilterConfigProps {
  isFilterEnabled: boolean;
  filterColumn: string;
  filterPlaceholderValue: string;
}

export interface DataTableProps<TData, TValue> {
  columns: ColumnDef<TData, TValue>[];
  data: TData[];
  paginationConfig?: PaginationConfigProps;
  filterConfig?: FilterConfigProps;
  rowClassName?: string;
  headerClassName?: string;
}

export function DataTable<TData, TValue>({
  columns,
  data,
  paginationConfig = {
    isPaginated: false,
    pageRowCount: 10,
  },
  filterConfig = {
    isFilterEnabled: false,
    filterColumn: '',
    filterPlaceholderValue: '',
  },
  rowClassName = '',
  headerClassName = '',
}: DataTableProps<TData, TValue>) {
  const [sorting, setSorting] = React.useState<SortingState>([]);
  const [columnFilters, setColumnFilters] = React.useState<ColumnFiltersState>(
    []
  );
  const [columnVisibility, setColumnVisibility] =
    React.useState<VisibilityState>({});

  const table = useReactTable({
    data,
    columns,
    getCoreRowModel: getCoreRowModel(),

    // Pagination Controls
    ...(paginationConfig && paginationConfig.isPaginated
      ? {
          getPaginationRowModel: getPaginationRowModel(),
          pageRowCount: paginationConfig.pageRowCount,
        }
      : {}),

    onColumnFiltersChange: setColumnFilters,
    getFilteredRowModel: getFilteredRowModel(),

    onColumnVisibilityChange: setColumnVisibility,

    onSortingChange: setSorting,
    getSortedRowModel: getSortedRowModel(),

    state: {
      sorting,
      columnFilters,
      columnVisibility,
    },
  });

  return (
    <div className="flex flex-col gap-4">
      {filterConfig && filterConfig.isFilterEnabled ? (
        <input
          placeholder={`Filter ${filterConfig.filterPlaceholderValue}...`}
          value={
            (table
              .getColumn(filterConfig.filterColumn)
              ?.getFilterValue() as string) ?? ''
          }
          onChange={(event) =>
            table
              .getColumn(filterConfig.filterColumn)
              ?.setFilterValue(event.target.value)
          }
          type="text"
        />
      ) : null}
      <div>
        <Table>
          <TableHeader
            {...(headerClassName ? { className: headerClassName } : {})}
          >
            {table.getHeaderGroups().map((headerGroup) => (
              <TableRow key={headerGroup.id}>
                {headerGroup.headers.map((header) => {
                  return (
                    <TableHead key={header.id}>
                      {header.isPlaceholder
                        ? null
                        : flexRender(
                            header.column.columnDef.header,
                            header.getContext()
                          )}
                    </TableHead>
                  );
                })}
              </TableRow>
            ))}
          </TableHeader>
          <TableBody>
            {table.getRowModel().rows?.length ? (
              table.getRowModel().rows.map((row) => (
                <TableRow
                  key={row.id}
                  data-state={row.getIsSelected() && 'selected'}
                  {...(rowClassName ? { className: rowClassName } : {})}
                >
                  {row.getVisibleCells().map((cell) => (
                    <TableCell key={cell.id}>
                      {flexRender(
                        cell.column.columnDef.cell,
                        cell.getContext()
                      )}
                    </TableCell>
                  ))}
                </TableRow>
              ))
            ) : (
              <TableRow>
                <TableCell
                  colSpan={columns.length}
                  className="h-24 text-center"
                >
                  No results.
                </TableCell>
              </TableRow>
            )}
          </TableBody>
        </Table>
      </div>
      {paginationConfig.isPaginated ? (
        <div className="flex items-center justify-end space-x-2 py-4">
          <Button
            variant="outline"
            size="sm"
            onClick={() => table.previousPage()}
            disabled={!table.getCanPreviousPage()}
          >
            Previous
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() => table.nextPage()}
            disabled={!table.getCanNextPage()}
          >
            Next
          </Button>
        </div>
      ) : null}
    </div>
  );
}

[TonyVeigel]

Why not just add the class to cell? You could access it with cell.column.columnDef.cellClassName which you could add to TableCell, although I think the preferred way is to put it here https://tanstack.com/table/v8/docs/api/core/column-def#meta.

[adarshSrivastava01]

How can I then make the types work there, if you see the columns object above it uses ColumnDef[] as type, and If I will add the cellClassName the type will fail.

[TonyVeigel]

No idea, I don't use TypeScript thankfully...