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Link to original content: http://github.com/expressjs/express/issues/6089
Error: Module '"express"' has no exported member · Issue #6089 · expressjs/express · GitHub
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Error: Module '"express"' has no exported member #6089

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kaiunido opened this issue Oct 27, 2024 · 3 comments
Open

Error: Module '"express"' has no exported member #6089

kaiunido opened this issue Oct 27, 2024 · 3 comments
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@kaiunido
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Hi...

I'm using express 5.0.1 (tried with last 4.x too) and trying to use with module.

And change my package.json adding:

"exports": "./dist/index.js",
  "type": "module",
  "engines": {
    "node": ">=20"
  },

package.json dependencies and scripts:

"scripts": {
    "start": "tsc-watch --onSuccess \"node dist/index.js\""
  },
...
"dependencies": {
    ...
    "express": "^5.0.1",
    ...
  },
"devDependencies": {
    "@eslint/js": "^9.13.0",
    "@tsconfig/node20": "^20.1.4",
    "@types/express": "^5.0.0",
    "@types/node": "^22.8.1",
    "eslint": "^9.13.0",
    "eslint-config-prettier": "^9.1.0",
    "eslint-plugin-prettier": "^5.2.1",
    "globals": "^15.11.0",
    "tsc-watch": "^6.2.0",
    "typescript": "^5.6.3",
    "typescript-eslint": "^8.11.0"
  },

And my tsconfig:

{
  "extends": "@tsconfig/node20/tsconfig.json",
  "compilerOptions": {
    "rootDir": "src",
    "outDir": "dist",
    "sourceMap": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noEmitOnError": true,
    "strictNullChecks": true,
    "noUnusedLocals": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "resolveJsonModule": true
  },
  "compileOnSave": true,
  "include": ["src/**/*", "src/locales/**/*.json"],
  "exclude": ["**/*.spec.ts"]
}

I tried change types version, express version, make a lot of search but don't find any way to fix.
When I run with pnpm start i`m getting a lot of errors like:

(4,15): error TS2305: Module '"express"' has no exported member 'NextFunction'.
(4,29): error TS2305: Module '"express"' has no exported member 'Request'.
(4,38): error TS2305: Module '"express"' has no exported member 'Response'.
(1,15): error TS2305: Module '"express"' has no exported member 'Response'.
(3,15): error TS2305: Module '"express"' has no exported member 'Response'.
# this one is in the "import express from 'express'"
src/index.ts(1,8): error TS1192: Module '"U:/projects/express/src/index"' has no default export.

Is the same with import ... or import type ...
image

If anyone can give me some light or direction I would appreciate it.

Thank you... :D
@kaiunido
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kaiunido commented Oct 28, 2024 •
edited
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If it helps, here is a repo with the minimum to reproduce the behavior: https://github.com/kaiunido/express-module-error

Edit: for a little more context, I was trying to test @auth/express and it is ESM only.

@Abdel-Monaam-Aouini
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you can enable esModuleInterop to allow importing default exports without explicit naming.
Add the following option to your tsconfig.json:

{
  "compilerOptions": {
    "esModuleInterop": true
  }
}

@kaiunido
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kaiunido commented Oct 28, 2024 •
edited
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@Abdel-Monaam-Aouini this option is already enabled in the extended tsconfig:

"extends": "@tsconfig/node20/tsconfig.json",

{
  "$schema": "https://json.schemastore.org/tsconfig",
  "_version": "20.1.0",

  "compilerOptions": {
    "lib": ["es2023"],
    "module": "node16",
    "target": "es2022",

    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "moduleResolution": "node16"
  }
}

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@kaiunido @Abdel-Monaam-Aouini @bjohansebas