Re: [whatwg/fetch] Optional disable setting headers keys in lowercase (#304)

But it was `X-Requested-With` using `XMLHttpRequest` up until now, not using `fetch` (and I do not think jQuery 3 uses `fetch`, so usage will grow even more) and so the case is preserved and servers may expect it. There are countless websites that add it due to their jQuery AJAX usage.

---
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/fetch/issues/304#issuecomment-228783580