[Types] Return type of "t" is string | MyTranslationsObject

[bhollis]

🐛 Bug Report

When I import t and use it, with a custom translations type, the return type of t is string | MyTranslationsObject instead of string

To Reproduce

In src/@types/i18next.d.ts:

// import the original type declarations
import 'i18next';

const translations = { Foo: { Bar: 'Hey' } };

declare module 'i18next' {
  interface CustomTypeOptions {
    defaultNS: 'translation';
    resources: { translation: typeof translations };
  }
}

In some other .ts file:

import { t } from 'i18next';

const foo = t('Foo.Bar');

Expected behavior

I expected the type of foo to be string.

Your Environment

• runtime version: node 18.11
• i18next version: 22.4.3
• os: Mac

[adrai]

seems to work:

i18next/test/typescript/custom-types/t.test.ts

Line 52 in c0bc1a6

i18next.t('bar').trim();

[bhollis]

I've changed the original example to use typeof, but it still doesn't work.

Let me check out the i8next repo and try to get a test failing.

[bhollis]

Here you go, this reproduces my issue: bhollis@4b3aca0

[adrai]

v22.4.4 should fix it