namespacesRequired in serverSideTranslations is not type-safe anymore

[t-ondrej]

💥 Regression Report

namespacesRequired type in serverSideTranslations is not constrained by the Namespace anymore. Type-safety achieved by overriding CustomTypeOptions in i18next.d.ts is lost and any string is accepted now.

The change was introduced in this commit.

Note: Don't know the typescript error that the commit fixed, but shouldn't the ElementArrayOrSelf have the following type

type ArrayElementOrSelf<T> = 
  T extends Array<infer U> 
    ? U[] 
    : T; // <-- Not T[] because it's not an identity of T

Last working version

Worked up to version: 13.3.0

Stopped working in version: 14.0.0

Expected behavior

serverSideTranslations.namespacesRequired accepts namespaces only. If no namespace is defined, any string is valid.

[adrai]

Would you like to provide A PR to address this?

[adrai]

Can you try with v14.0.2 ?

[t-ondrej]

Thank you for the quick response. Unfortunately, it still didn't work. I have provided a PR that fixes it.