Error on firebase require in node JS

[ahmad1508]

I'm trying to use firebase auth in the backend for authentification i tried to follow the firebase documentation to import these functions which does not work for nodeJS

import { getAuth, createUserWithEmailAndPassword } from "firebase/auth";
const auth = getAuth();
createUserWithEmailAndPassword(auth, email, password)
  .then((userCredential) => {
    Signed in 
    const user = userCredential.user;
  })
  .catch((error) => {
    const errorCode = error.code;
    const errorMessage = error.message;  });

i tried to change the into a const ... = require() instead of an import
but now i'm getting this error
FirebaseError: Firebase: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp() (app/no-app).

if i use the old version with firebase 8 requiring firebase i'm getting this error,
[Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" - Firebase](https://stackoverflow.com/questions/69200493/error-err-package-path-not-exported-no-exports-firebase)

i'm trying to create a user in a express app endpoint:

   app.post('/signup', (req, res) => {
    const newUser = {
        email: req.body.email,
        password: req.body.password,
        confirmPassword: req.body.confirmPassword,
        handle: req.body.handle,
    }

    createUserWithEmailAndPassword(auth, newUser.email, newUser.password)
        .then(data => {
            return res.status(201).json({ message: `user${data.user.uid} signed up succesfully` })
        })
        .catch(err => {
            console.error(err)
            return res.status(500).json({ error: err.code })
        })
   })

How can i solve my problem ??

[Tanishq-lather]

Ok, I can understand your issue..
In your First code, you used ECMAScript for importing modules. Now, you want to shift to CommonJS, which is not actually too good, but you can use it if you really want to.

Ok, see there is a Package.json file in your Project.
Visit that File and see there is a line "type": "module" under the line "main": "server_name"
Erase that("type": "module") line from your code.

If, it helps you then Let me Know and If the problem persists then I'll give you some more solutions for it.