index.ts

/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
/* vim: set ts=2: */

import * as XLSX from 'xlsx';

const { read, utils: { sheet_to_json } } = XLSX;

export function readFirstSheet(data: any, options: XLSX.ParsingOptions): any[][] {
  const wb: XLSX.WorkBook = read(data, options);
  const ws: XLSX.WorkSheet = wb.Sheets[wb.SheetNames[0]];
  return sheet_to_json(ws, { header: 1, raw: true });
}