Error: Firebase is throwing an error stating that it cannot access the length property of an undefined property

I need help establishing a connection with Firebase.

Here is the code snippet from firebase.js:

import * as firebase from "firebase/compat/app";

const firebaseConfig = {
  apiKey: "***",
  authDomain: "***",
  projectId: "***",
  storageBucket: "***",
  messagingSenderId: "***",
  appId: "***",
};

const app = !firebase.apps.length
  ? firebase.initializeApp(firebaseConfig)
  : firebase.app();

const db = app.firestore();
const auth = app.auth();
const provider = new firebase.auth.GoogleAuthProvider();

export { db, auth, provider };

javascriptfirebasenext.js

Answer №1

Ensure you have the necessary imports for Firestore (as indicated in the error message) and Authentication.

import * as firebase from "firebase/compat/app";
import 'firebase/compat/auth';
import 'firebase/compat/firestore';

For more information, refer to the guidelines in updating imports to v9 compat.

Answer №2

In reference to my previous response on a similar topic, there have been notable updates to the way firebase imports work. To address this, consider updating fribase to firebase/compat/app. Visit the documentation for more information.

Answer №3

Stumbled upon this solution recently and thought I'd share it with you:
Simply update the "firebase" version to "^9.4.0"

import { initializeApp } from 'firebase/app';
import { getFirestore } from 'firebase/firestore';
import { getAuth, GoogleAuthProvider } from 'firebase/auth'

const firebaseConfig = {
apiKey: "*********************",
authDomain: "**************.com",
projectId: "*********",
storageBucket: "**************",
messagingSenderId: "***********",
appId: "**********************"
};

const app = initializeApp(firebaseConfig);

const db = getFirestore(app);//access to the database
const auth = getAuth(); //access to the authentication
const provider = new GoogleAuthProvider(); //access tp the provider

export { db, auth, provider };

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