Setting a cell or row Protection Locked to true does not prevent editing in xlsx

When setting a column or row level Protection lock, the resulting .xlsx file still has those columns/cells editable. It is possible to lock the entire worksheet, but not individual cells.

import * as Excel from 'exceljs';
import * as fs from 'fs';  

  const stream = fs.createWriteStream(
    `${FilePath}`,
    {
      flags: 'a',
    }
  );
const DefaultColumns = [
    'Col1',
    'Col2',
    'Col3',
    'Col4',
    'Col5',
  ];

  const placeHolders = new Array(DefaultColumns.length);
  const workbook = new Excel.Workbook();
  workbook.created = new Date();
  workbook.modified = new Date();

  const sheet = workbook.addWorksheet('sheet 1', {
    //Also not sure what this is supposed to show
    //No difference if datavalidation condition is failed
    pageSetup: { errors: 'dash' },
  });

  const headerRow = sheet.addRow(DefaultColumns);
  headerRow.eachCell((cell, rowNum) => {
    //@ts-ignore  Typing is wrong
    cell.note = `This is ${rowNum}`;
    //Doesn't do anything
    cell.protection = { locked: true };
  });

  //Also doesn't do anything
  headerRow.protection = { locked: true };
  headerRow.commit();

await workbook.xlsx.write(res);

[Kelendria]

After setting the protection information on a cell or a row and before writing the file you have to protect the worksheet.

sheet.protect('thepassword', {
          formatCells: true,
          formatColumns: true,
          formatRows: true,
          insertRows: true,
          insertColumns: false,
          insertHyperlinks: true,
          deleteRows: true,
          deleteColumns: false,
          sort: true,
          autoFilter: true
        })

[preyash2047]

I have solved it 🚀

there are 2 steps in implementing excel protection,

step 1: set the cell/ row as unlocked (by default all cells in excel are locked) -> for cell: sheet.getCell('A1').protection = { locked: false, lockText: false }; -> for row: sheet.getRow(2).protection = { locked: false, lockText: false };

step 2: protect the sheet with optional values -> with password: await sheet.protect('312dsasfafewr312edqwdqd213ed', { selectLockedCells: false, selectUnlockedCells: true, }); -> without password: await sheet.protect('', { selectLockedCells: false, selectUnlockedCells: true, });

Note: Flow to implement cell/row protection of Microsoft excel, as well as exceljs, are the same logically.