How can I send files with Ktor client and FormData in KotlinJS? I receive files as

FileList

(which contains the actual Files) from React Input of type

file

. But I haven't found a way to append them to FormData. I tried using the

org.w3c.xhr.FormData

but I get the error

IllegalStateException: Fail to serialize body. Content has type: class null, but OutgoingContent expected.

But when I try to use the Ktors

io.ktor.client.request.forms

FormData, there is no override for

append

that accepts File type

I've added a comment to https://stackoverflow.com/questions/70173389/send-images-in-formdata-with-ktor-in-kotlinjsreact-filelist-from-input

Thank you!