Viewing data while logged into a site help.

Is there a way to send post data to a page and get the “set-cookie” response header value, then use those cookies in future get/post requests using FuseJS or any other language that can be used with Fuse?

I haven’t really messed with cookies much, but if you really learn about the fetch api, I’m sure you can figure out what it is that you want: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API