Possible to redirect POST only?

[remy]

I've got a normal login page and the <form>'s action points to /login. So when you run a GET you get the content from Next, and when you run a POST you should hit the /api/login.js.

I can add a redirect to Next via the next.config.js but can't currently see that it should be conditional based on the request type.

Is it possible?

Otherwise I can POST to /api/login, but if the user posted when JS didn't fully hook (or if it failed to download for whatever reason), I want to make sure the endpoint would redirect them to signed in (whereas a client-side sign in would only get the token back and to a client side redirect).

In the (g)olden days, I would have checked the xml-requested-with - but that seems… clunky compared to all the shiny tools we have…no?