types field in package.json exports doesn't work

[tjx666]

Bug Report

🔎 Search Terms

types, package.json, exports, import entry points

🕗 Version & Regression Information

typescript: ^4.9.4

Reproduce:

1. git clone https://github.com/tjx666/ts-exports-development
2. git reset --hard 70706c6845b0d8c1e55e4ab53619b91c77bcc37d
3. pnpm install
4. cd packages/app
5. tsc --noEmit

⏯ Playground Link

Reproduce Repo

💻 Code

monorepo project structure:

.
├── node_modules
│   ├── tsup -> .pnpm/[email protected][email protected]/node_modules/tsup
│   └── typescript -> .pnpm/[email protected]/node_modules/typescript
├── package.json
├── packages
│   ├── app
│   │   ├── node_modules
│   │   │   └── tools -> ../../tools
│   │   ├── package.json
│   │   ├── src
│   │   │   └── index.ts
│   │   └── tsconfig.json
│   └── tools
│       ├── dist
│       │   ├── index.d.ts
│       │   ├── index.js
│       │   └── index.mjs
│       ├── package.json
│       ├── src
│       │   └── index.ts
│       └── tsconfig.json
├── pnpm-lock.yaml
└── pnpm-workspace.yaml

In packages/app/src/index.ts

// error: Cannot find module 'tools' or its corresponding type declarations
import { add } from 'tools';

console.log(add(2, 4));

In packages/tools/src/index.ts

export function add(a: number, b: number) {
    return a + b;
}

the package.json of package tools

{
    "name": "tools",
    "version": "1.0.0",
    "description": "",
    "scripts": {
        "build": "tsup src/index.ts --dts --format esm,cjs"
    },
    "keywords": [],
    "author": "",
    "license": "ISC",
    "exports": {
        ".": {
            "types": "./dist/index.d.ts",
            "import": {
                "development": "./src",
                "default": "./dist/index.mjs"
            },
            "require": {
                "development": "./src",
                "default": "./dist/index.js"
            }
        }
    }
}

🙁 Actual behavior

🙂 Expected behavior

No error

[UchihaVeha]

Same problem after the update from 4.9.3 to 4.9.4. It looks like it happened with monorepo. I am using yarn 3.3.0 workspaces

[andrewbranch]

You are using "moduleResolution": "node" which does not support package.json exports. The value "node" represents the resolution of Node 10, which never included package.json exports support. (I recently renamed this value to "node10" in #51901.) For modern Node, you need to use "module": "node16" or "nodenext", which will also set the correct moduleResolution option that supports package.json exports and other newer resolution features.

[typescript-bot]

This issue has been marked 'Working as Intended' and has seen no recent activity. It has been automatically closed for house-keeping purposes.