ShadTable

1.Density is three predefined class maps, not a runtime calculation

densityCell and densityHead are plain lookup objects keyed by 'compact' | 'comfortable' | 'spacious'. Switching density just picks a different precomputed set of Tailwind classes for every cell — no inline style math, no per-row measurement.

const densityCell: Record<Density, string> = {
  compact: 'py-1 text-xs',
  comfortable: 'py-2 text-sm',
  spacious: 'py-4 text-base',
}

2.Export reads whatever the table is currently showing, not a separate field list

getExportData() pulls headers straight from table.getHeaderGroups()[0].headers and row values from table.getRowModel().rows[].getVisibleCells(). CSV and Excel export always match the columns actually rendered — hide a column later and export follows automatically, with no second copy of the field list to keep in sync.

function getExportData() {
  const headers = table.getHeaderGroups()[0].headers.map((header) =>
    typeof header.column.columnDef.header === 'string' ? header.column.columnDef.header : header.column.id,
  )
  const rows = table.getRowModel().rows.map((row) =>
    row.getVisibleCells().map((cell) => String(cell.getValue() ?? '')),
  )
  return { headers, rows }
}

3.Excel export is an HTML table with an .xls extension, not a real spreadsheet file

toExcelHtml builds a plain <table> string, and downloadFile serves it with the application/vnd.ms-excel MIME type and a .xls filename. Excel (and Google Sheets) both recognize that combination and open it as a worksheet, so a real spreadsheet-writing library was never necessary for this example.

export function toExcelHtml(headers: string[], rows: string[][]): string {
  const th = headers.map((h) => `<th>${h}</th>`).join('')
  const trs = rows.map((row) => `<tr>${row.map((cell) => `<td>${cell}</td>`).join('')}</tr>`).join('')
  return `<table><thead><tr>${th}</tr></thead><tbody>${trs}</tbody></table>`
}

4.PDF export is just the browser's print dialog

exportPdf calls window.print() directly — nothing else. "Save as PDF" is already a destination every modern browser offers in that dialog, so there's no PDF-generation code anywhere in this example, only the print: styling below that decides what the dialog actually shows.

function exportPdf() {
  window.print()
}

5.The print output ignores the app's theme entirely

Every table element carries a print: variant forcing black text on a white background and black borders, regardless of whether the page is currently in dark mode — a printed page is always on white paper. The density/export toolbar itself is print:hidden, since neither control has any reason to appear on a printed page.

<div className="... print:hidden">{/* density + export controls */}</div>
<Table className="print:bg-white print:text-black">
  {/* every TableHead / TableCell also carries print:text-black */}
</Table>