var fs = Npm.require('fs');
var path = Npm.require('path');
var basepath = path.resolve('.').split('.meteor')[0];

var excel = new Excel('xls');

var excel = new Excel('xlsx');

var workbook = excel.readFile( basepath+'yourFilesFoler/someExcelFile.xls'); 

var yourSheetsName = workbook.SheetNames;

console.log("Get the 1st Sheet Name (remember is an array): " + workbook.SheetNames[0]);
console.log("Get Some Cell from it: " + workbook.Sheets[yourSheetsName[0]][
'C37'].v);

// We want JSON for this sheet:
var sheet = workbook.Sheets[yourSheetsName[0]]
// You can get the sheet as list of lists.
var options = { header : 1 }
// Or you  can get an object with column headers as keys.  
var options = { header : ['title', 'fName', 'sName' ,'address' ] }
// If options is empty or omitted, it should use the first-row headers by default. 
// However this doesn't seem to work with all Excel worksheets. 
var options = {}
// Generate the JSON like so:
var workbookJson = excel.utils.sheet_to_json( sheet, options );

var workbookCsv = excel.utils.sheet_to_csv(workbook.Sheets[yourSheetsName[0]]);
console.log(workbookCsv.length);