I'd brought up in a support ticket that I'd wanted to submit a PR for a feature we need in order to use this our application, and got the general okay pending signing a contributor agreement. Still waiting on that document, but figured I'd go ahead and send this over anyway.

The idea here is that we need to be able to pass in event handlers that will inject custom logic into the component, rather than simply uploading to and downloading from hardcoded URLs.

I haven't tested any of this (or looked into setting up a local build/test environment at all), but it at least compiles successfully in my editor (vscode) and seems like a simple enough change that I wouldn't expect any regressions.