CFS - how to track file upload progress/completion?

I’ve managed to upload a file to my S3 bucket, but I’d like to be able to track progress. The README on GitHub mentions progress-tracking a few times, but doesn’t explain how to do it. Any help would be majorly appreciated. CFS has been the biggest hurdle on this project so far.

Maybe if you mentioned what you are using to upload…
Slingshot package have it in documentation.

Like I mentioned, I’m using CFS (cfs:s3).

I’m going to give Slingshot a try.