When using 'next dev', two requests are sent to /login or /logout about next-firebase-auth

[RustedBuckett]

I am getting six requests to the login and logout endpoints. This isn't just on dev but also when deployed to vercel in prod env (getting four on prod env). Strict mode is on in dev env.

[thesatyam05]

I had the same issue, but having this issue on a development server is not a problem until you experience the same thing with the optimized build. The reason behind you experiencing this issue might be related with strict mode ( causing two renders ) and using useEffect.
I hope this helps. 😊

[lazycipher]

@yosipy, is this happening locally only?
Can you check if strictmode is active or not? https://nextjs.org/docs/pages/api-reference/next-config-js/reactStrictMode

[lazycipher]

This is the deployed link sent by @yosipy

@RustedBuckett, it calls 2 times in dev if strict mode is on. But not sure why 6. Can I get any deployment or any link to code so that I can try to reproduce?

[kmjennison]

Thanks for the issue. Could this be related to hot reloads or other dev-related rerenders?

#424 would serve as a band-aid fix, but it would be good to know the underlying cause here. Help wanted!

[kmjennison]

Closing this as an expected behavior of React's strict mode:

To help you find accidentally impure code, Strict Mode calls some of your functions (only the ones that should be pure) twice in development.

However, implementing #424 would remove this behavior in development, too.