Create pages with files on the front end

[DrQuincy]

I know how to create pages with the API and how to add images and files. I just wondered, though, if there was any in-buit way to handle instant AJAX file uploads as the backend does. As you know, if you submit the files with the rest of the form it can take a while if there are multiple large files.

In the PW CMS, however, you upload them and they're applied on save and somehow cleaned up if not used. Is there any way to tap into this workflow or do oyu have to roll your own?

Thanks.