Is there currently no support for submitting multipart form data with a request?
I understand how to perform a POST with d3.json().post() as described here, but I wanted to use POST to submit parameters to an API via multipart/form-data.
It seems strange that I can not find any resources on how best to do this; the closest I have come is https://github.com/mbostock/d3/issues/929 and https://github.com/mbostock/d3/wiki/Requests but these do not really cover multipart forms.
Is there an undocumented part of the functionality described in #929 that I couldn't find in d3.v3.js which would allow for use of multipart forms? Is anyone currently working on or interested in this issue?