I am doing an easy desktop app to crop photos, in order to do this I have a npm project with a few dependencies and an HTML file and launch the browser with the following command, chromium-browser --disable-web-security.

The problem is that when the app execute this code:

crop(event) {
        cropper.getCroppedCanvas().toBlob((blob) => {
        saveAs(new Blob([blob] ), './a.jpg');
      });

And this download automatically the file in the download folder instead of the same folder where the index file is.

Any idea about how can I set a relative path to download the file?

Thanks.