Generate viewBox attributes for svgs based on width and height when set

genViewbox.js

var fs = require('fs');

var DOMParser = require('xmldom').DOMParser;
var XMLSerializer = require('xmldom').XMLSerializer;

var addViewboxToSvg = function(svgPath) {
    fs.readFile(svgPath, 'utf-8', function(error, svgStr) {
        if (error) {
            return console.log(error)
        }

        var doc = new DOMParser().parseFromString(svgStr, 'text/xml');

        if (!doc.documentElement.hasAttribute('viewBox')) {
            var width = doc.documentElement.getAttribute('width');
            var height = doc.documentElement.getAttribute('height');

            if (width && height) {
                doc.documentElement.setAttribute('viewBox', '0 0 ' + parseInt(width) + ' ' + parseInt(height));

                var docStr = new XMLSerializer().serializeToString(doc);
                fs.writeFile(svgPath, docStr, function(error) {
                    if (error) {
                        console.log(error);
                    }
                });
            }
        }
    });
};

var svgsFolder = 'dashlane_scan_exports_norm';

fs.readdir(svgsFolder, function(error, files) {
    if (error) {
        return console.log(error);
    }

    files
    .filter(function(file) { 
        return file.substr(-4) === '.svg'; 
    })
    .forEach(function(filename) {
        addViewboxToSvg(svgsFolder + '/' + filename);
    });
});