Can't use TS typedefs on an ESM setup

[basicdays]

Describe the bug

I am not able to use the TypeScript type definition files when my Node 18 project is setup with ESM support enabled. TypeScript compilation will produce the following error:

Could not find a declaration file for module 'graphql-modules'. '/workspace/node_modules/graphql-modules/index.mjs' implicitly has an 'any' type.
There are types at '/workspace/node_modules/graphql-modules/index.d.ts', but this result could not be resolved when respecting package.json "exports". The 'graphql-modules' library may need to update its package.json or typings.

To Reproduce

Steps to reproduce the behavior:

package.json (abbreviated):

{
  "type": "module",
  "devDependencies": {
    "typescript": "~5.0"
  }
}

tsconfig.json (abbreviated):

{
  "compilerOptions": {
    "module": "node16",
    "moduleResolution": "node16"
  }
}

In any ts file the following will produce the TypeScript error:

import { createModule, gql } from "graphql-modules";

Expected behavior

An import should use the expected type definition files.

Environment:

• OS: MacOS 12.6.6
• @graphql-modules/...: 2.1.2
• NodeJS: 18.16.0

Additional context

Was able to find some documentation on how to reference typedefs in the new exports feature: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-7.html#packagejson-exports-imports-and-self-referencing

For what it's worth looking at the current graphql-modules package.json file, it currently has the following:

{
  "main": "index.js",
  "module": "index.mjs",
  "typings": "index.d.ts",
  "typescript": {
    "definition": "index.d.ts"
  },
  "exports": {
    ".": {
      "require": "./index.js",
      "import": "./index.mjs"
    },
    "./*": {
      "require": "./*.js",
      "import": "./*.mjs"
    },
    "./package.json": "./package.json"
  }
}

The graphql package at version 16.6.0 seems to be working correctly. It currently has the following:

{
  "main": "index",
  "module": "index.mjs",
  "typesVersions": {
    ">=4.1.0": {
      "*": [
        "*"
      ]
    },
    "*": {
      "*": [
        "NotSupportedTSVersion.d.ts"
      ]
    }
  }
}

[basicdays]

My current workaround is just to do the following when importing:

import graphqlModules = require("graphql-modules");

const { gql, createModule } = graphqlModules;

[basicdays]

Good news, I edited the graphql-modules/package.json file in my node_modules directly and got it working with the following:

{
  "main": "index.js",
  "module": "index.mjs",
  "typings": "index.d.ts",
  "typescript": {
    "definition": "index.d.ts"
  },
  "exports": {
    ".": {
      "require": {
        "types": "./index.d.ts",
        "default": "./index.js"
      },
      "import": {
        "types": "./index.d.ts",
        "default":"./index.mjs"
      }
    },
    "./*": {
      "require": {
        "types": "./*.d.ts",
        "default": "./*.js"
      },
      "import": {
        "types": "./*.d.ts",
        "default": "./*.mjs"
      }
    },
    "./package.json": "./package.json"
  }
}

[basicdays]

So I just revisted this again. Was going to do a PR to fix this, but I noticed that the package.json in the source includes the proper typings: https://github.com/Urigo/graphql-modules/blob/master/packages/graphql-modules/package.json#L21

However the package.json you get from the package published to npm is missing the exports["."].types and exports["./*"].types fields. I've used patch-package to at least rectify this for now, but is this a bug in the publishing process that's changing them? Does the package just need to get republished to get the correct exports?

Here's the patch-package diff for reference:

diff --git a/node_modules/graphql-modules/package.json b/node_modules/graphql-modules/package.json
index 00c64ab..c5b45b2 100644
--- a/node_modules/graphql-modules/package.json
+++ b/node_modules/graphql-modules/package.json
@@ -30,11 +30,13 @@
   "exports": {
     ".": {
       "require": "./index.js",
-      "import": "./index.mjs"
+      "import": "./index.mjs",
+      "types": "./index.d.ts"
     },
     "./*": {
       "require": "./*.js",
-      "import": "./*.mjs"
+      "import": "./*.mjs",
+      "types": "./*.d.ts"
     },
     "./package.json": "./package.json"
   }

[wKich]

@patrickjm could you please take a look at this. It seems you fixed types in source code in this PR #2324 but the final package.json doesn't have that fix

[itpropro]

Any updates on this @patrickjm ? These are the exports from the published npmjs package, they seem to miss the types:

[patrickjm]

No updates here, would recommend making another PR for this one.

[itpropro]

No updates here, would recommend making another PR for this one.

The source code looks fine, this seems to be connected to the publishing pipeline.