The following function allow to download a file directly in the browser without any filecreate text file javascriptjs download file from serverjavascript write data to Save a text file locally with a filename, by triggering a download in JavaScript - save-file-local.js. The value of the attribute will be the name of the downloaded file. automatically detect the correct file extension and add it to the file (.img, .pdf, .txt, .html, etc.). The Formidable module can be downloaded and installed using NPM: res.write('