function download(pdfUrl, fileName) {
        fetch(pdfUrl).then(resp => resp.arrayBuffer()).then(resp => {
            const file = new Blob([resp], {type: 'application/pdf'});
            const fileURL = URL.createObjectURL(file);
            jQuery("#download-button-prev").attr('href', fileURL).attr('download', fileName);
        });
    }

    download(linkUrl, docName);