I don't know if it makes any sense, but i will give an example so us to make it clear. Let's say i want people that uses my website, to be able to upload gigas of data. Can i catch this event and run it in the background while the user navigates through the website doing other stuff? So far when i upload a 1gb file (using ajax), if i refresh or go to another page the upload is interrupted. I believe it is possible but i need help on what needs to be done.