jQuery File Upload not using XHR or IFrame

[Neil Middleton]

I have an upload solution using a setup similar to this one where people can drag a file onto the page and have it upload to S3.

However, I'm hitting an issue with XHR/Iframe upload. Essentially, if I leave out forceIframeTransport the file will get uploaded to S3 successfully, but the entire page ends up on S3, as that's where the form has submitted to.

When I include forceIframeTransport set to true, nothing happens. There are no exceptions in the console, nothing happening on the server.

I have included jquery.iframe-transport, jquery.ui.widget and jquery.fileupload in the page, in that order.