How to create an Excel File with Nodejs?

Question

I am a nodejs programmer . Now I have a table of data that I want to save in Excel File format . How do I go about doing this ?

I found a few Node libraries . But m

Answer 1

excel4node is a maintained, native Excel file creator built from the official specification. It's similar to, but more maintained than mxexcel-builder mentioned in the other answer.

// Require library
var excel = require('excel4node');

// Create a new instance of a Workbook class
var workbook = new excel.Workbook();

// Add Worksheets to the workbook
var worksheet = workbook.addWorksheet('Sheet 1');
var worksheet2 = workbook.addWorksheet('Sheet 2');

// Create a reusable style
var style = workbook.createStyle({
  font: {
    color: '#FF0800',
    size: 12
  },
  numberFormat: '$#,##0.00; ($#,##0.00); -'
});

// Set value of cell A1 to 100 as a number type styled with paramaters of style
worksheet.cell(1,1).number(100).style(style);

// Set value of cell B1 to 300 as a number type styled with paramaters of style
worksheet.cell(1,2).number(200).style(style);

// Set value of cell C1 to a formula styled with paramaters of style
worksheet.cell(1,3).formula('A1 + B1').style(style);

// Set value of cell A2 to 'string' styled with paramaters of style
worksheet.cell(2,1).string('string').style(style);

// Set value of cell A3 to true as a boolean type styled with paramaters of style but with an adjustment to the font size.
worksheet.cell(3,1).bool(true).style(style).style({font: {size: 14}});

workbook.write('Excel.xlsx');

Answer 2

XLSx in the new Office is just a zipped collection of XML and other files. So you could generate that and zip it accordingly.

Bonus: you can create a very nice template with styles and so on:

1. Create a template in 'your favorite spreadsheet program'
2. Save it as ODS or XLSx
3. Unzip the contents
4. Use it as base and fill content.xml (or xl/worksheets/sheet1.xml) with your data
5. Zip it all before serving

However I found ODS (openoffice) much more approachable (excel can still open it), here is what I found in content.xml

<table:table-row table:style-name="ro1">
    <table:table-cell office:value-type="string" table:style-name="ce1">
        <text:p>here be a1</text:p>
    </table:table-cell>
    <table:table-cell office:value-type="string" table:style-name="ce1">
        <text:p>here is b1</text:p>
    </table:table-cell>
    <table:table-cell table:number-columns-repeated="16382"/>
</table:table-row>

Answer 3

install exceljs

npm i exceljs --save

import exceljs

var Excel = require('exceljs');
var workbook = new Excel.Workbook();

create workbook

var options = {
                filename: __dirname+'/Reports/'+reportName,
                useStyles: true,
                useSharedStrings: true
            };

            var workbook = new Excel.stream.xlsx.WorkbookWriter(options);

after create worksheet

var worksheet = workbook.addWorksheet('Rate Sheet',{properties:{tabColor:{argb:'FFC0000'}}});

in worksheet.column array you pass column name in header and array key pass in key

worksheet.columns = [
            { header: 'column name', key: 'array key', width: 35},
            { header: 'column name', key: 'array key', width: 35},
            { header: 'column name', key: 'array key', width: 20},

            ];

after using forEach loop append row one by one in exel file

array.forEach(function(row){ worksheet.addRow(row); })

you can also perfome loop on each exel row and cell

worksheet.eachRow(function(row, rowNumber) {
    console.log('Row ' + rowNumber + ' = ' + JSON.stringify(row.values));
});
row.eachCell(function(cell, colNumber) {
    console.log('Cell ' + colNumber + ' = ' + cell.value);
});

Answer 4

Although this question has several answers, they may now be a little dated.

New readers may prefer to consider the xlsx or "sheetsJS" package, which now seems to now be by far the most popular node package for this use case.

The current top answer recommends excel4node , which does look quite good - but the latter package seems less maintained (and far less popular) than the former.

Answering the question directly, using xlsx:

const XLSX = require('xlsx');

/* create a new blank workbook */
const wb = XLSX.utils.book_new();

// Do stuff, write data
//
//

// write the workbook object to a file
XLSX.writeFile(workbook, 'out.xlsx');