Utilizing NPM Workspaces to efficiently distribute TypeScript definition files (`*.d.ts`) across multiple workspaces

In my TypeScript monorepo utilizing NPM Workspaces, I have two packages: A and B.

Package B requires type definitions from package A.

To accomplish this, I included a reference to A's definition file in the tsconfig.json of package B. However, something feels off:

{
  "include": ["../a/types.d.ts", "next-env.d.ts", "**/*.ts", "**/*.tsx"],
  "exclude": ["node_modules"]
}

The relative reference bothers me. I expected it to work with a/types.d.ts since "a" is the package name — but it doesn't seem to be functioning properly.

Could I be making a mistake somewhere?

Answer №1

In my experience, the best solution is to package all configuration files into one package. This approach mirrors what Turborepo does when setting up a monorepo from scratch. By including packages such as @repo/typescript-config and @repo/eslint-config, you can ensure consistency across projects. Consider incorporating @repo/type-definitions in the same manner.

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