download-s3images-as-zip-from-node.js

exports.getImageZip = function(req, res) {

    var folder = req.params.id + '/';
    // var folderName = new Date().toISOString().replace('T', '_').split('.')[0];
    var folderName = folder;
    var obj = req.query;
    var array = [];
    for (var key in obj) {
        if (!obj.hasOwnProperty(key)) continue;
        array.push(obj[key]);
    }

    res.setHeader('Content-type', 'application/octet-stream');
    res.setHeader("Content-Description", "File Transfer");
    res.setHeader("Content-Disposition", "attachment; filename=" + folderName + ".zip");
    res.setHeader("Content-Transfer-Encoding", "binary");
    s3Zip
        .archive({ region: config.aws.region, bucket: config.aws.s3.bucket }, folder, array)
        .pipe(res);
};

front-end-download-images-as-zip.js

downloadFile() {
        var folder = 'folderName'; // s3 bucket folder name. And images have to be inside a folder in s3.
        var query = '';
        query += 'image1=image1_name.ext';
        query += '&image2=image2_name.ext';
        query += '&image3=image3_name.ext';
        var url = API + '/v/1/file/downloadzip/' + folder + '?' + query;
        // var a = document.createElement('a');
        // a.setAttribute("href", url);
        window.open(url, '_blank');
        // angular.element(a)[0].click();
    }

Where do you require s3Zip, Is getImageZip an angular component? Or how you call it