File Upload using Base64 from JS Package

Howdy! I’m trying to build a component for avatar uploads, and so far I’ve got it done all the way up to submitting the cropped image.

I have a JS package called Croppie that can return a Base64-encoded representation of the cropped image, via the result() method. How would I tell my Livewire component that I want the image input to be submitted with this result() instead of the file upload itself?