Module resolution: Full Node.js 23+ TS support

[jacob-ebey]

Demo Repo

https://github.com/jacob-ebey/ts-resolution-reproduction

Which of the following problems are you reporting?

The module specifier resolves at build time, but shouldn't because it doesn't at runtime

Demonstrate the defect described above with a code sample.

Within a.ts, import { test } from "./b.js" should not resolve as it is an invalid specifier at runtime.

Run tsc --showConfig and paste its output here

{
    "compilerOptions": {
        "target": "esnext",
        "module": "nodenext",
        "moduleResolution": "nodenext",
        "allowImportingTsExtensions": true,
        "rewriteRelativeImportExtensions": true,
        "verbatimModuleSyntax": true,
        "moduleDetection": "force",
        "isolatedModules": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true,
        "resolvePackageJsonExports": true,
        "resolvePackageJsonImports": true,
        "preserveConstEnums": true,
        "useDefineForClassFields": true
    },
    "files": [
        "./a.ts",
        "./b.ts"
    ]
}

Run tsc --traceResolution and paste its output here

log.txt

Paste the package.json of the importing module, if it exists

{
  "type": "module",
  "scripts": {
    "start": "node a.ts"
  },
  "devDependencies": {
    "typescript": "^5.8.2"
  }
}

Paste the package.json of the target module, if it exists

{
  "type": "module",
  "scripts": {
    "start": "node a.ts"
  },
  "devDependencies": {
    "typescript": "^5.8.2"
  }
}

Any other comments can go here

Seems we need a way to say exactFileExtensions: true to fully support Node.js.