Create empty Workbook unsing NodeJS

I’ve already installed js-xlsx with:

npm install xlsx

How do I create an empty Workbook using nodejs?

Example:

XLSX = require('xlsx');
var wb =  new XLSX.Workbook(); // This won't work.

I want to create a new Workbook to load data from a database and then save it.

Thanks.

[waylonflinn]

I ran into this too. So, I made a module to make it easier to create new workbooks and do simple editing of existing workbooks.

https://github.com/waylonflinn/xlsx-workbook

Here’s a snippet from the docs:

// the Workbook object gives you more control and stores multiple sheets 
var Workbook = require('xlsx-workbook').Workbook;
 
var workbook = new Workbook();
 
var sales = workbook.add("Sales");
var costs = workbook.add("Costs");
 
sales[0][0] = 304.50;
sales[1][0] = 159.24;
sales[2][0] = 493.38;
 
costs[0][0] = 102.50;
costs[1][0] = 59.14;
costs[2][0] = 273.32;
 
// automatically appends the '.xlsx' extension 
workbook.save("Revenue-Summary");

[rodw]

Hi @arthurspa, just picked up js-xlsx this evening so there may well be a better answer, but following the example at http://sheetjs.com/demos/writexlsx.html I’ve noticed that something like:

var wb = { SheetNames:[], Sheets:{} };

seems to be a sufficient to initialize a Workbook object.

That is, any object (map) with a SheetNames array and Sheets map can (when SheetNames and Sheets are correctly populated) be saved as described at https://github.com/SheetJS/js-xlsx#writing-workbooks.