How to track the download of multiple files in XHR?

Question

AJAX

Good day! There was a question about uploading files to the server. How can ONE XHR object track the upload of, say, 20 files to the server?

Answer 1

https://learn.javascript.ru/xhr-onprogress
Either send a single request and track the progress of all at once, or send a separate request for each file and track the progress for each separately