It were already implemented. See how to use it in file field with upload progress blog post.
Also, see how to disable file upload progress.
This is a feature requested by Andrew,
he veeery want this to be implemented.
I think it would be interested for the rest of the users?
So do you need load indicator on your web forms?
by Igor Petrushenko | 1 comment | 2 supporters (show) | 2 Total points (show)
It were already implemented. See how to use it in file field with upload progress blog post.
Also, see how to disable file upload progress.