The unexpected identifier 'express' was encountered in the import call, which requires either one or two arguments

I'm in the process of constructing an express server using typescript and Bun. Recently, I completed my register route:

import express from "express";

const router = express.Router();
router.get('/registerUser',(_req:express.Request,res:express.Response): void => {
    res.send('Hello World');
});


module.exports = router;

index.ts:

SERVER.use('/pmo/api/v1/auth', require('./controllers/auth_controllers/register.controller.ts'));

This is what my tsconfig file looks like:

  "compilerOptions": {
    "lib": ["ESNext"],
    "module": "esnext",
    "target": "esnext",
    "moduleResolution": "bundler",
    "moduleDetection": "force",
    "allowImportingTsExtensions": true,
    "noEmit": true,
    "composite": true,
    "strict": true,
    "downlevelIteration": true,
    "skipLibCheck": true,
    "jsx": "react-jsx",
    "allowSyntheticDefaultImports": true,
    "forceConsistentCasingInFileNames": true,
    "allowJs": true,
    "types": [
      "bun-types" // add Bun global
    ]
  }
}

I searched for solutions online and browsed through forums but couldn't find anyone facing the same issue. Most suggestions involved adding type="module" to the script tag, but since I don't have an HTML file, I've included it in my package.json instead.

Answer №1

Make this adjustment:

const router = express.Router();

to ensure compatibility:

export const router = express.Router();

Remove the following line:

module.exports = router;

It is important to note that utilizing module.exports in ES6 with a specified type="module" in your package.json file is not allowed. It is necessary to utilize the export keyword instead.

Prior to making this change, ensure you have executed bun add express.

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