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React the application does not execute a request to firebase

The application works correctly on the local server, executes a request to Firebase and provides information from it.
But the deploy version does not fulfill the request to firebase in any way. I don't understand what could be the problem?
Firebase configuration in the application
`
const firebaseConfig = {
apiKey: 'AIzaSyDjRWZ9**********QwkgyqTeVbN*',
authDomain: 'project-keeper-2a3fe.firebaseapp.com',
databaseURL:
'https://******.europe-west1.firebasedatabase.app',
projectId: 'project-keeper-2a3fe',
storageBucket: 'project-keeper-2a3fe.appspot.com',
messagingSenderId: '495347609056',
appId: '1:495347609056:web:d058a40ddff6b5420ecf85',
measurementId: 'G-SKDZVBKHN5'
}
export default firebaseConfig
`
Initializing firebase in the application
`
import { initializeApp } from 'firebase/app'
import { getAnalytics } from 'firebase/analytics'
import { getAuth } from 'firebase/auth'
import { getFirestore } from 'firebase/firestore'
import firebaseConfig from '../../config/firebaseConfig'
const app = initializeApp(firebaseConfig)
const db = getFirestore(app)
const auth = getAuth(app)
const analytics = getAnalytics(app)
export { db }
`
Executing a request to firestore
`
import { db } from '../../shared/api/firebase/firebase'
import { collection, getDocs } from 'firebase/firestore'
export const CardsListPage = () => {
const [cards, setCards] = useState([])
useEffect(() => {
return async () => {
const colRef = collection(db, 'cards')
const snapshots = await getDocs(colRef)
const docs = snapshots.docs?.map(doc => {
const data = doc.data()
data.id = doc.id
return data
})
setCards(docs)
}
}, [])
return (
<>
<Header />
<main className='main'>
<div className='main-container'>
<div className='main-container__cards'>
{cards.map(card => (
<Card key={card.id} {...card} />
))}
</div>
</div>
...
`
I don't understand what the problem might be. Everything works on the local server, but not on the hosting
Requests to firebase on the local server
Requests to firebase on a remote server

I might think of you not added firebaseConfig file to hosting. It works fine on locally but as you ignored or not added any config files(because it has secret keys) it might not work.
Also I could think of some ENV variables that you didn't added to your hosting
server if they exists. (In that case, ENV's prefix should be REACT_APP_. ex. REACT_APP_MY_SECRET_KEY)

Firebase createUserWithEmailAndPassword method returns undefined

I'm trying to signup using the firebase - createUserWithEmailAndPassword method, but it returns undefined when I try to log the returned value.
My config file :
import firebase from "firebase/app"
import "firebase/auth"
import "firebase/firestore"
const firebaseConfig = {
apiKey: "xxxxxx",
authDomain: "xxxxx",
projectId: "xxxxxx",
storageBucket: "xxxxxx",
messagingSenderId: "xxxxxx",
appId: "xxxxxxx",
}
firebase?.initializeApp(firebaseConfig)
const auth = firebase?.auth()
const firestore = firebase?.firestore()
export { auth, firestore }
My signup file:
import React, { useState } from "react"
import { auth } from "../firebase"
function Signup(props: Props) {
const [email, setEmail] = useState("")
const [password, setPassword] = useState("")
console.log({ email, password })
async function handleSubmit(e) {
console.log("clicked")
e.preventDefault()
const res = await auth?.createUserWithEmailAndPassword(email, password)
console.log(res) -> gives undefined
}
return (
<>
<div>
<form onSubmit={(e) => handleSubmit(e)}>
<input value={email} onChange={(e) => setEmail(e.target.value)} />
<input value={password} onChange={(e) => setPassword(e.target.value)} />
<button type='submit'>Submit</button>
</form>
</div>
</>
)
}
export default Signup
I'm using firebase version - 9.6.5
On the Firebase dashboard, I don't see anything getting logged neither I get any error on the console.
I have already read other such answers the solution is mostly around using the right package version/upgrading, deleting node modules or initializing the config carefully. I believe I'm doing these steps right.
I'm not sure what I'm doing wrong, any help in the right direction would be very helpful. thanks!

https://firebase.google.com/docs/auth/web/password-auth#web-version-9
Please check the official Doc for v9.
I think your approach corresponds to v8
I am using same approach as yours for v8 and its working Good.
Or you can try to deprecate to v8 and try your code on that.

I've figured out the issue here, v9 documentation changes how we import and use the method,
In the config file,
import { initializeApp } from "firebase/app"
import { getFirestore } from "firebase/firestore"
import { getAuth } from "firebase/auth"
const firebaseConfig = {
....
}
// Initialize Firebase
initializeApp(firebaseConfig)
const db = getFirestore()
const auth = getAuth()
export { auth, db }
import { auth } from "../firebase"
import { createUserWithEmailAndPassword } from "firebase/auth"
createUserWithEmailAndPassword(auth, email, password).then((i) => console.log(i))

Retrieving Firebase Data in a config.js file for React Native Expo App

I've been developing a React Native Expo App which is compatible with both iOS and Android devices. In this app I need to retrieve and render data from my google firebase database.
I would like to rewrite my firebase code into a config.js file as currently I have the firebase script inside each App screen which is causing issues. Instead, I want to write a config.js file which exports the data, allowing me to retrieve the data in each screen by the import statement:
import { CustomerData } from '../app/config.js';
The code below (minus the export statement) works just fine on each screen when I use the 'info' data retrieved. However this is causing issue when adding new features to screens and is an inefficient way to retrieve google firebase data.
I've attempted to write the config.js file like so:
import "firebase/firestore";
import * as firebase from "firebase";
import React, { useState, Component, useEffect } from "react";
import "react-native-gesture-handler";
const firebaseConfig = {
apiKey: <My Api Key>,
authDomain: <My AuthDomain>,
projectId: <My Project Id>,
storageBucket: <My storage Bucket>,
messagingSenderId: <Sender Id>,
appId: <App ID>,
measurementId: <Measurement ID>,
};
if (!firebase.apps.length) {
firebase.initializeApp(firebaseConfig);
} else {
firebase.app();
}
function GetData() {
const [info, setInfo] = useState([]); // Initial empty array of info
useEffect(() => {
const dbh = firebase.firestore();
dbh
.collection("CustomerDatabase")
.get()
.then((querySnapshot) => {
const info = [];
querySnapshot.forEach((documentSnapshot) => {
info.push({
...documentSnapshot.data(),
key: documentSnapshot.id,
});
});
setInfo(info);
});
}, []);
export info;
I believe I need to add an export function which exports the retrieved data - 'info'. However I have attempted to place this export statement in different locations in the script and it returns the error
SyntaxError: 'import' and 'export' may only appear at the top level. (44:0)
Even when placing the export statement at the start of the script I still receive the same error. Also when removing the export state it throws the error:
TransformError SyntaxError: Unexpected token (44:15)
Indicating the last line as the culprit. This same code format works on the app screens however.
How would I export the 'info' data from within a config.js file? or do I have to stick to retrieving my firebase data from within each screens js file?

I ran this code, and except for the fact that you forgot to add a curly brace to close your GetData funtion, there appears to be no other error
import "firebase/firestore";
import * as firebase from "firebase";
import React, { useState, Component, useEffect } from "react";
import "react-native-gesture-handler";
const firebaseConfig = {
apiKey:"",
authDomain:"",
projectId:"",
storageBucket:"",
messagingSenderId:"",
appId:"",
measurementId:"",
};
if (!firebase.apps.length) {
firebase.initializeApp(firebaseConfig);
} else {
firebase.app();
}
function GetData() {
const [info, setInfo] = useState([]); // Initial empty array of info
useEffect(() => {
const dbh = firebase.firestore();
dbh
.collection("CustomerDatabase")
.get()
.then((querySnapshot) => {
const info = [];
querySnapshot.forEach((documentSnapshot) => {
info.push({
...documentSnapshot.data(),
key: documentSnapshot.id,
});
});
setInfo(info);
});
}, []);
}
export {info};

It makes sense though because info is not a global variable, you declared info as a variable in GetData, so if you want it to be accessible you should return it in your GetData() function. Then you can now export GetData and you should get back info from the function.
import "firebase/firestore";
import * as firebase from "firebase";
import React, { useState, Component, useEffect } from "react";
import "react-native-gesture-handler";
const firebaseConfig = {
apiKey:"",
authDomain:"",
projectId:"",
storageBucket:"",
messagingSenderId:"",
appId:"",
measurementId:"",
};
if (!firebase.apps.length) {
firebase.initializeApp(firebaseConfig);
} else {
firebase.app();
}
function GetData() {
const [info, setInfo] = useState([]); // Initial empty array of info
useEffect(() => {
const dbh = firebase.firestore();
dbh.collection("CustomerDatabase").get().then((querySnapshot) => {
const info = [];
querySnapshot.forEach((documentSnapshot) => {
info.push({
...documentSnapshot.data(),
key: documentSnapshot.id,
});
});
setInfo(info);
});
}, []);
return(info);
}
export {info};
//Then wherever you want to use info you can just do this...
import {GetData} from "filepath";
const info = GetData();

Another way I like to export state in my react apps is to define the state in my App.js so it's accessible to every component in my app. Example of how I would export a state holding the theme for my app below. I pass my state ad its setter as a prop to my AppRouting Component. And then whenever I have a component I want to have access to the theme in my AppRouting, I just do this: theme={props.theme} setTheme={props.setTheme}
import { useState } from "react";
import { Box, ThemeProvider, } from "#mui/material";
import { darkTheme } from "./Theming/AppTheme";
import AppRouting from "./Pages/AppRouting";
const App = () => {
const [theme, setTheme] = useState(darkTheme);
return(
<ThemeProvider theme={theme}>
<Box
sx={{
position:"absolute",
width:"100vw",
height:"auto",
minHeight:"100vh",
top:"0",
left:"0",
display:"flex",
backgroundColor:"background.default",
}}
>
<AppRouting
theme={theme}
setTheme={setTheme}
/>
</Box>
</ThemeProvider>
);
}
export default App;

How to use firebase auth and Cloud Firestore from different components as a single firebase App

I am trying to use firebase in my React project to provide the auth and database functionalities.
In my App.js I have
import app from "firebase/app";
import "firebase/auth";
app.initializeApp(firebaseConfig);
In my other components called <Component /> rendered by App.js I have this to initialize the database
import app from "firebase/app";
import "firebase/firestore";
const db = app.firestore();
However this time I got this error
Uncaught FirebaseError: Firebase: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp() (app/no-app).
So I tried to put app.initializeApp(firebaseConfig); in this component too but I got a new error again to tell me I instantiated twice.
Uncaught FirebaseError: Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app).
So one workaround I came up with is to create a context at App.js and right after app.initializeApp(firebaseConfig); I created the database by const db = app.firestore(); and pass the value to the context and let the <Component /> to consume. However I don't know if this is a good solution or not.
My question is different from How to check if a Firebase App is already initialized on Android for one reason. I am not trying to connect to a second Firebase App as it was for that question. There is only one Firebase App for my entire project, to provide two services: auth and database.
I tried the solution from that question to use in <Component />
if (!app.apps.length) {
app.initializeApp(firebaseConfig);
}
const db = app.firestore();
but it didn't work it still gives me Uncaught FirebaseError: Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app). error

You use different instances of Firebase in App and Component.
// firebaseApp.js
import firebase from 'firebase'
const config = {
apiKey: "...",
authDomain: "...",
databaseURL: "....",
projectId: "...",
messagingSenderId: "..."
};
firebase.initializeApp(config);
export default firebase;
Than you can import firebase from firebaseApp.js and use it. More details here

Make a file firebaseConfig.js in src/firebase directory for firebase configuration:
import firebase from 'firebase/app'; // doing import firebase from 'firebase' or import * as firebase from firebase is not good practice.
import 'firebase/auth';
import 'firebase/firestore';
// Initialize Firebase
let config = {
apiKey: process.env.REACT_APP_FIREBASE_API_KEY,
authDomain: process.env.REACT_APP_FIREBASE_AUTH_DOMAIN,
databaseURL: process.env.REACT_APP_FIREBASE_DATABASE_URL,
projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
messagingSenderId: process.env.REACT_APP_FIREBASE_MESSAGING_SENDER_ID,
};
firebase.initializeApp(config);
const auth = firebase.auth();
const db = firebase.firestore();
const googleAuthProvider = new firebase.auth.GoogleAuthProvider();
const emailAuthProvider = new firebase.auth.EmailAuthProvider();
export { auth, firebase, db, googleAuthProvider, emailAuthProvider };
All you have to do in Component.js is:
import { db } from './firebase/firebaseConfig.js'; // Assuming Component.js is in the src folder
Store the api keys in a .env file in the root folder of the project (the parent of src):
REACT_APP_FIREBASE_API_KEY=<api-key>
REACT_APP_FIREBASE_AUTH_DOMAIN=<auth-domain>
REACT_APP_FIREBASE_DATABASE_URL=<db-url>
REACT_APP_FIREBASE_PROJECT_ID=<proj-name>
REACT_APP_FIREBASE_STORAGE_BUCKET=<storage-bucket>
REACT_APP_FIREBASE_MESSAGING_SENDER_ID=<message-sender-id>

The error message you are receiving is valid and has to do with the order your modules are imported. ES6 modules are pre-parsed in order to resolve further imports before code is executed.
Assuming the very top of your App.js looks something like this:
import Component from '../component';
...
import app from "firebase/app";
import "firebase/auth";
app.initializeApp(firebaseConfig);
The problem here is that inside import Component from '.../component';
import app from "firebase/app";
import "firebase/firestore";
const db = app.firestore();
That code gets executed before you do:
app.initializeApp(firebaseConfig);
There's many ways to fix this problem including some solutions presented above and the proposal to just store your firebase config in a firebase-config.js and import db
from that.
This answer is more about understanding what the problem was ... and as far as the solution I think your Context Provider is actually really good and commonly practiced.
More about es6 modules here
Firebase React Setup
Hope that helps.

You can use a context as you said or redux (using a middleware to initialize, and global state to keep the db):
// Main (for example index.js)
<FirebaseContext.Provider value={new Firebase()}>
<App />
</FirebaseContext.Provider>
Firebase.js:
import app from 'firebase/app'
import 'firebase/firestore'
const config = {
apiKey: process.env.API_KEY,
databaseURL: process.env.DATABASE_URL,
projectId: process.env.PROJECT_ID,
storageBucket: process.env.STORAGE_BUCKET
}
export default class Firebase {
constructor() {
app.initializeApp(config)
// Firebase APIs
this._db = app.firestore()
}
// DB data API
data = () => this._db.collection('yourdata')
...
}
FirebaseContext.js:
import React from 'react'
const FirebaseContext = React.createContext(null)
export const withFirebase = Component => props => (
<FirebaseContext.Consumer>
{firebase => <Component {...props} firebase={firebase} />}
</FirebaseContext.Consumer>
)
Then you can use withFirebase in your container components:
class YourContainerComponent extends React.PureComponent {
state = {
data: null,
loading: false
}
componentDidMount() {
this._onListenForMessages()
}
_onListenForMessages = () => {
this.setState({ loading: true }, () => {
this.unsubscribe = this.props.firebase
.data()
.limit(10)
.onSnapshot(snapshot => {
if (snapshot.size) {
let data = []
snapshot.forEach(doc =>
data.push({ ...doc.data(), uid: doc.id })
)
this.setState({
data,
loading: false
})
} else {
this.setState({ data: null, loading: false })
}
})
})
})
}
componentWillUnmount() {
if (this._unsubscribe) {
this._unsubscribe()
}
}
}
export default withFirebase(YourContainerComponent)
You can see the whole code here: https://github.com/the-road-to-react-with-firebase/react-firestore-authentication and a tutorial here: https://www.robinwieruch.de/complete-firebase-authentication-react-tutorial/
If you implement it using redux, and redux-thunk you can isolate all firebase stuff in middleware, actions, and reducers (you can take ideas and sample here: https://github.com/Canner/redux-firebase-middleware); and keep the business logic in your components so they do not need to know how your data collections are stored and managed. The components should know only about states and actions.

The best way I have found to use firebase in react is to first initialize and export firebase to then execute the desired functions.
helper-firebase.js
import * as firebase from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
// Everyone can read client side javascript, no need to use an .env file
// I only used environment variables for firebase-admin
import { FIREBASE_CONFIG } from '../../config';
// Initialize Firebase
firebase.initializeApp(FIREBASE_CONFIG);
export const auth = firebase.auth();
export const provider = new firebase.auth.GoogleAuthProvider();
export const db = firebase.firestore();
export default firebase;
your-component.js
import {
auth,
provider,
db,
} from '../../../helpers/helper-firebase';
...
componentDidMount() {
this.usersRef = db.collection('users');
// Look for user changes
auth.onAuthStateChanged(this.authChanged);
}
authChanged(user) {
// Set value on the database
this.usersRef.doc(user.uid).set({
lastLogin: new Date(),
}, { merge: true })
.then(() => {
console.log('User Updated');
})
.catch((error) => {
console.error(error.message);
});
}
login() {
auth.signInWithPopup(provider)
.then((res) => {
console.log(newUser);
})
.catch((error) => {
console.error(error.message);
})
}
...
But i would recommend use 'redux-thunk' to store data on state:
redux-actions.js
import {
auth,
} from '../../../helpers/helper-firebase';
export const setUser = payload => ({
type: AUTH_CHANGED,
payload,
});
export const onAuthChange = () => (
dispatch => auth.onAuthStateChanged((user) => {
// console.log(user);
if (user) {
dispatch(setUser(user));
} else {
dispatch(setUser());
}
})
);
export const authLogout = () => (
dispatch => (
auth.signOut()
.then(() => {
dispatch(setUser());
})
.catch((error) => {
console.error(error.message);
})
)
);

Here is a simple example of storing the signed-in user data from google OAuth into firestore collection.
Store firebase config in a separate file
firebase.utils.js
import firebase from 'firebase/app';
import 'firebase/firestore';
import 'firebase/auth';
//replace your config here
const config = {
apiKey: '*****',
authDomain: '******',
databaseURL: '******',
projectId: '******,
storageBucket: '********',
messagingSenderId: '*******',
appId: '**********'
};
firebase.initializeApp(config);
export const createUserProfileDocument = async (userAuth) => {
if (!userAuth) return;
const userRef = firestore.doc(`users/${userAuth.uid}`);
const snapShot = await userRef.get();
if (!snapShot.exists) {
const { displayName, email } = userAuth;
const createdAt = new Date();
try {
await userRef.set({
displayName,
email,
createdAt
});
} catch (error) {
console.log('error creating user', error.message);
}
}
return userRef;
};
export const auth = firebase.auth();
export const firestore = firebase.firestore();
const provider = new firebase.auth.GoogleAuthProvider();
provider.setCustomParameters({ prompt: 'select_account' });
export const signInWithGoogle = () => auth.signInWithPopup(provider);
App.js
import React from 'react';
import { auth, createUserProfileDocument, signInWithGoogle } from './firebase.utils';
class App extends React.Component {
constructor() {
super();
this.state = {
currentUser: null
};
}
unsubscribeFromAuth = null;
componentDidMount() {
this.unsubscribeFromAuth = auth.onAuthStateChanged(async userAuth => {
if (userAuth) {
const userRef = await createUserProfileDocument(userAuth);
userRef.onSnapshot(snapShot => {
this.setState({
currentUser: {
id: snapShot.id,
...snapShot.data()
}
});
console.log(this.state);
});
}
this.setState({ currentUser: userAuth });
});
}
componentWillUnmount() {
this.unsubscribeFromAuth();
}
render() {
return(
<React.Fragment>
{ this.state.currentUser ?
(<Button onClick={() => auth.signOut()}>Sign Out</Button>)
:
(<Button onClick={signInWithGoogle} > Sign in with Google </Button>)
}
</React.Fragment>
)
}
}
export default App;
I suggest you use store management libraries like Redux when you want to share the state between components. In this example, we have finished everything in a single component. But in realtime, you may have a complex component architecture in such use case using store management libraries may come in handy.

Where do I initialize Firebase app in React application?

I'm trying to integrate Firebase into my React app and after looking at various tutorials, I can't seem to find a consensus on where to put the firebase initialization code firebase.initializeApp(config).
My app's structure is this:
- app.js
- components
|___Index.jsx
|___Layout.jsx
|___PageContent.jsx
Each file looks like the following
app.js
Does all the express setup with server-side rendering
Index.jsx
import React from 'react';
import Layout from './Layout.jsx';
import PageContent from './PageContent.jsx';
import './global.css';
class Index extends React.Component {
render() {
return (
<Layout title={this.props.title}>
<PageContent />
</Layout>
);
}
}
export default Index;
PageContent.jsx
import React from 'react';
import ReactDOM from 'react-dom';
import LandingPage from './components/Landing_Page/Landing.jsx';
class PageContent extends React.Component {
render() {
return (
<LandingPage />
);
}
}
if (typeof window !== 'undefined') {
ReactDOM.render(
<PageContent />,
document.getElementById('root')
);
}
export default PageContent;
I need to make sure Firebase is available in every page of my website. Right now it is a single page app but eventually I'll be adding more.
Can anybody help me understand where I might put the database initialization code so that it is applied everywhere?

this is how I do it
create file Firebase.js next to app.js and put your initialization code
Firebase.js file
import * as firebase from 'firebase';
let config = {
apiKey: "XXXXXXX",
authDomain: "XXXXX",
databaseURL: "XXXXX",
projectId: "XXXXX",
storageBucket: "XXXX",
messagingSenderId: "XXXX"
};
firebase.initializeApp(config);
export default firebase;
and then import Firebase.js file every where you want to use it , for example
import React from 'react';
import firebase from './../Firebase.js' // <------ import firebase
class Test extends React.Component {
componentDidMount(){
firebase.database().ref().child("X").on('value' , {...});
}
render() {
return (
<h1>Hello</h1>
);
}
}
export default Test;

Create file with name firebase.js
import firebase from "firebase/app";
import "firebase/auth";
import "firebase/firestore";
const firebaseConfig = {
apiKey: 'AIzaXXXXXXXXXXXXXXXXXXXXXXX',
authDomain: 'test-XXXX.firebaseapp.com',
databaseURL: 'https://test-db.firebaseio.com',
projectId: 'test-XXXX',
storageBucket: 'test-bucket.appspot.com',
messagingSenderId: 'XXXXXXX',
appId: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
};
firebase.initializeApp(firebaseConfig);
export const firebaseAuth = firebase.auth();
export const firestore = firebase.firestore()
Then use it as follows:
import { firebaseAuth } from 'firebase'
import SigninForm from 'signin.js'
const ModalSignIn = props => {
const [email, setEmail] = useState()
const [password, setPassword] = useState()
const handleSubmit = e => {
e.preventDefault()
firebaseAuth
.signInWithEmailAndPassword(email, password)
.then(res => {
console.log(res.user)
})
.catch(err => {
const { code, message } = err
console.log(code, message)
})
}
return (<SigninForm/>)

It seems that what you want is that firebase can be globally available to your react components.
It's the same question before using redux, how does react components consume the global state tree? Global variables? Come on, we'll know global variables are evil. React props? It seems very react but passing props down from root to the leaf components can't be fun.
Context API comes to rescue. You simply need firebase bindings for react just as redux/react-router did.
Assume you don't want to reinvent wheels,
If you use redux, consider react redux firebase
If you hates boilerplates, consider react firebase
and of course you can also build your own react firebase bindings through react context as just mentioned.