[whatwg] Show upload progress

[Joaquin Cuenca Abela]

Hi,

A lot of people are implementing progress bars that show in real time the upload status of files being uploaded.

Right now it's a pain to implement that kind of functionality, as the browser has to poll regularly the server with a secondary connection to get the total size of the request, and the number of bytes already received.

Given that the browser already knows that information, I think it would be great if it could expose it on some DOM object. What do you think?

Cheers,