js-merge-xlsx

Minimum JavaScript-based template engine for MS-Excel. js-merge-xlsx empowers you to print JavaScript objects.

• Available for both web browser and Node.js .
• Bulk printing. It is possible to print array as 'multiple files'.
• Bulk printing. It is possible to print array as 'multiple sheets'.

Template

After printing

Install

npm install js-merge-xlsx

Prepare template

Prepare the template with bind-variables as mustache format {{}}.
Note: Only string cell is supported. Please make sure that the format of cells having variables is String.

Node.js

example

const Promise = require('bluebird');
const readYamlSync = require('read-data').yaml.sync;
const fs = Promise.promisifyAll(require('fs'));
const _ = require('underscore');
const {merge, bulkMergeToFiles, bulkMergeToSheets} = require('js-merge-xlsx');

const config = {
    template:   './template/Template.xlsx',
    singleData: './data/data1.yml',
    arrayData:  './data/data2.yml'
};

const readData = () => {
    let templateObj = fs.readFileSync(config.template);
    let data  = readYamlSync(config.singleData);
    let bulkData = readYamlSync(config.arrayData);

    return {
        templateObj: templateObj,
        data: data,
        bulkData1: _.map(bulkData, (e, index) => {
            return {name: `file${index + 1}.xlsx`, data: e};
        }),
        bulkData2: _.map(bulkData, (e, index) => {
            return {name: `example${index + 1}`, data: e};
        })
    };
};

//Start
let {templateObj, data, bulkData1, bulkData2} = readData();

//example of merge()
fs.writeFileSync('example1.xlsx',  merge(templateObj, data));

//example of bulkMergeToFiles()
fs.writeFileSync(
    'example2.zip',
    bulkMergeToFiles(templateObj, bulkData1)
);

//example of bulkMergeToSheets()
//this method is called async by returning Promise(bluebird) instance.
bulkMergeToSheets(templateObj, bulkData2)
.then((excel) => {
    fs.writeFileSync('example3.xlsx', excel);
});

Please check example codes and API for detail.

Browser

You can also use it on web browser by using webpack(browserify). Bluebird automatically casts thenable object, such as object returned by "$http.get()" or "$.get()", to trusted Promise. https://github.com/petkaantonov/bluebird/blob/master/API.md#promiseresolvedynamic-value---promise
So, you can code in the same way as Node.js.
example

const Promise = require('bluebird');
const {merge, bulkMergeToFiles, bulkMergeToSheets} = require('js-merge-xlsx');
const JSZip = require('jszip');
const _ = require('underscore');

module.exports = ($scope, $http) => {

    $scope.merge = () => {
        Promise.props({
            template: $http.get('/template/Template.xlsx', {responseType: 'arraybuffer'}),
            data:     $http.get('/data/data1.json')
        }).then(({template, data}) => {

            //FileSaver#saveAs()
            saveAs(merge(template, data), 'example.xlsx');
        }).catch((err) => {
            console.log(err);
        });
    };

    $scope.bulkMergeToFiles = () => {
        Promise.props({
            template: $http.get('/template/Template.xlsx', {responseType: 'arraybuffer'}),
            data:     $http.get('/data/data2.json')
        }).then(({template, data}) => {

            data = _.map(data.data, (e,index) => {
                return {name: `file${(index+1)}.xlsx`, data: e};
            });
            //FileSaver#saveAs()
            saveAs(bulkMergeToFiles(template, data), 'example.zip');
        }).catch((err) => {
            console.log(err);
        });
    };

    $scope.bulkMergeToSheets = ()=>{
        Promise.props({
            template: $http.get('/template/Template.xlsx', {responseType: 'arraybuffer'}),
            data:     $http.get('/data/data2.json')
        }).then(({template, data}) => {

            data = _.map(data.data, (e,index) => {
                return {name: `sample${(index+1)}`, data: e};
            });

            //bulkMergeToSheets() is called asyc by returning Promise(bluebird) instance.
            return bulkMergeToSheets(template, data);
        }).then((excel) => {

            saveAs(excel,'example.xlsx');
        }).catch((err) => {
            console.log(err);
        });
    };
};

Please check example codes and API for detail.