import ExcelJS  from 'exceljs';
const { Workbook } = ExcelJS ;
const workbook = new Workbook();
const data = await workbook.xlsx.readFile('data.xlsx');

const worksheet = workbook.worksheets[0];
for (const image of worksheet.getImages()) {
  console.log('processing image row', image.range.tl.nativeRow, 'col', image.range.tl.nativeCol, 'imageId', image.imageId);
  // fetch the media item with the data (it seems the imageId matches up with m.index?)
  const img = workbook.model.media.find(m => m.index === image.imageId);
  console.log('found image for imageId', image.imageId, 'extension', img.extension);
  // fs.writeFileSync(`${image.range.tl.nativeRow}.${image.range.tl.nativeCol}.${img.name}.${img.extension}`, img.buffer);
}