ts is compiled into cjs and mjs suffix files and cannot be debugged using vscode.

[tomgao365]

Does this issue occur when all extensions are disabled?: Yes/No

• VS Code Version: 1.85.0
• OS Version: windows 11 23H2

Steps to Reproduce:

1. create a project, and run pnpm init

• package.json

{
  "name": "vscode-debug-esm-cjs",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "tsup --watch",
    "build": "tsup"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@tomjs/tsconfig": "^1.1.2",
    "@types/node": "^20.10.4",
    "tsup": "^8.0.1",
    "typescript": "^5.3.3"
  }
}

• src/index.ts

const now = Date.now();
console.log(now);

• tsup.config.ts

import { defineConfig } from 'tsup';

export default defineConfig({
  entry: ['src/index.ts'],
  format: ['cjs', 'esm'],
  splitting: false,
  sourcemap: true,
  clean: true,
});

.vscode/launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Debug js",
      "type": "node",
      "request": "launch",
      "skipFiles": [
        "<node_internals>/**"
      ],
      "program": "${workspaceFolder}/dist/index.js"
    },
    {
      "name": "Debug mjs",
      "type": "node",
      "request": "launch",
      "skipFiles": [
        "<node_internals>/**"
      ],
      "program": "${workspaceFolder}/dist/index.mjs"
    },
    {
      "name": "Debug cjs",
      "type": "node",
      "request": "launch",
      "skipFiles": [
        "<node_internals>/**"
      ],
      "program": "${workspaceFolder}/dist/index.cjs"
    }
  ]
}

2. run pnpm build
3. Run and Debug , test Debug js and Debug

Files with the ".mjs" suffix cannot be debugged, but files with the ".js" suffix can be debugged.

4. add "type":"modules" to package.json, and run pnpm build. Files with the "*.cjs" suffix cannot be debugged, the same problem as ".mjs"

5. The full demo is https://github.com/my-alpha/vscode-debug-esm-cjs

[vscodenpa]

Thanks for creating this issue! It looks like you may be using an old version of VS Code, the latest stable release is 1.85.0. Please try upgrading to the latest version and checking whether this issue remains.

Happy Coding!

[connor4312]

Thanks for the nice issue, you can also work around this by manually specifying the outFiles in your launch.json to include .{js,mjs,cjs} instead of just .js