Progress is not working

[pisacode]

When using the package with react and send a file from client side, progress just returns NaN.

I have cloned the repo and played around with the lib/upload.js and found and xhr event listener for progress never fires. I have tried different methods but couldn't get it to work.

Does any body have an idea how to fix this issues?

Related code

 var xhr = new XMLHttpRequest();

        xhr.upload.addEventListener(
          "progress",
          function (event) {
            if (event.lengthComputable) {
              loaded.set(event.loaded);
              total.set(event.total);
            }
          },
          false
        );