In more details, I wish to make a background uploader (in HTML, JS and PHP for backend), which will show the progress bar on a part of the page, and the user can continue working on the site.
An example for this is Google Drive where you can upload big files, and the progress is shown on the bottom-right of the page even if you refresh/reload the page or open another page within google drive.
The aim is to make a div object which will stay on the page even if the page is reloaded or it is changed.
Thank you.