Have a look at [url removed, login to view] or [url removed, login to view]
we would like to impliment tha, backend will be in PHP
use case :
there are multiple pages on each page user will upload a file and move on to next page,
uploading should be working in background even after page refresh,
multiple files will be queued in background as user moves from one page to another,
if user tried to close the browser while uploading is going on it will show a warning and will prevent that from happening.
A simple progress bar indicator for user will be good.
// in our actual usage we have to upload audio recording ( instead of selecting file and uploading ) but it should work with that,
once you're comfortable in above task I will show you our audio recording code so that you will be able to understand integration better.
Hope that helps,
You will find below links useful