[enhancement]: flat configs are possibly undefined

[CHC383]

Is there an existing issue for this?

• I have searched the existing issues and my issue is unique
• My issue appears in the command-line and not only in the text editor

Description Overview

This is a follow up of #3874, since flat is Record<string, ReactFlatConfig>, flat.xxx or flat["xxx"] could be undefined. The fix might be explicitly list recommended, all and jsx-runtime as the key of the Record instead of using string.

import tseslint from 'typescript-eslint'
import reactPlugin from 'eslint-plugin-react'

export default tseslint.config(
  reactPlugin.configs.flat.recommended
)

Argument of type 'ReactFlatConfig | undefined' is not assignable to parameter of type 'InfiniteDepthConfigWithExtends'.

Expected Behavior

No type error

eslint-plugin-react version

v7.37.4

eslint version

9.17.0

node version

v22.13.0

[ljharb]

To be clear, this is not a bug - the types are correct - but you're right they could be more helpful.

[CHC383]

Just to share a workaround for Typescript users until we figure out how to type the configs properly

// @ts-expect-error https://github.com/jsx-eslint/eslint-plugin-react/issues/3878
reactPlugin.configs.flat.recommended,