How to pass withCredentials option to Request?

Question

According to the CORS spec, withCredentials: true can be set on an XHR or Fetch request to include authorization credentials in the pre-flight request.

I'm using the Request library (in the browser). How can I pass that property through? Simply including { withCredentials } in the options like this doesn't seem to work:

request.get({
   ...,
   auth: {...},
   withCredentials: true
})

Answer 1

To answer my own question, I have confirmed that the Request library does indeed support the withCredentials: true option (or rather, one of its dependencies does), and it eventually gets translated into a credentials: "include" parameter passed to fetch().

As noted in comments above, the behaviour of that is not what I was expecting, but the issue is not with Request.