Eslint complains when updating type-fest

[angelod1as]

I'm trying to update type-fest in my project, but when doing it, my eslint complains of some files inside the type-fest folder.

This is weird as it is, so I'm asking here if there's any config that I'm missing.

My .eslintignore has node_modules/ in it (and it works, I tested with different packages), but it still fails linting with the following:

node_modules/type-fest/source/camel-case.d.ts:25:32 - error TS1005: '?' expected.

25  infer FirstWord extends string,
                                  ~

node_modules/type-fest/source/camel-case.d.ts:26:42 - error TS1005: '?' expected.

26  ...infer RemainingWords extends string[],
                                            ~

node_modules/type-fest/source/join.d.ts:32:56 - error TS1005: '?' expected.

32    ...infer Rest extends ReadonlyArray<string | number>,
                                                          ~


Found 3 errors in 2 files.

Errors  Files
     2  node_modules/type-fest/source/camel-case.d.ts:25
     1  node_modules/type-fest/source/join.d.ts:32

I'd love some help debugging this. What information do you need further than this?

    "type-fest": "^3.6.1",

    "babel-eslint": "^10.1.0",
    "eslint": "^8.24.0",
    "eslint-config-next": "^13.0.2",
    "eslint-config-prettier": "^8.5.0",
    "eslint-plugin-cypress": "^2.12.1",
    "eslint-plugin-jest": "^26.2.2",
    "eslint-plugin-lodash": "^7.4.0",
    "eslint-plugin-no-only-tests": "^3.1.0",
    "eslint-plugin-react-hooks": "^4.6.0",

Thanks a lot in advance.

[voxpelli]

error TS1005 is a TypeScript error, not an ESLint error

Which version of TypeScript are you using?

[angelod1as]

"typescript": "^4.6.3",

apparently if I update it, a lot of other things in my project complains (I'm using NextJS: "next": "^12.3.1", and I can't update it).

If the case is that my typescript is outdated, then it's OK to close this issue.

[voxpelli]

@angelod1as Current type-fest requires TS 4.7 as a minimum, test if you can upgrade to that at least, otherwise my recommendation would be to downgrade type-fest for now, sorry :/

[angelod1as]

@voxpelli no problem. Thanks for the response and help.