How to fix this bug ? Unexpected SyntaxError: Unexpected token '!' - reactjs

So basically the console is showing me that I have an unexpected token but I don't think there is any unexpected token. Please help me. I have taken way too much time trying to fix this problem. Here is the code -
import React from 'react';
import firebase from 'firebase';
export default function App() {
// I have deleted this information because I don't want anyone to access my data
const firebaseConfig = {};
firebase.initializeApp(firebaseConfig);
function signInWithGoogle() {
var google_provider = new firebase.auth.GoogleAuthProvider();
firebase
.auth()
.signInWithPopup(google_provider)
.then((res) => {
console.log(res);
})
.catch((error) => {
console.log(error);
});
}
return (
<div>
<h1>Google Sign In Authentication</h1>
<button onClick={signInWithGoogle}>Sign In</button>
</div>
);
}

The only issue I see in the provided code is you have not imported the Firebase Auth SDK. You can import that as shown below:
import firebase from 'firebase';
import "firebase/auth"
Also make sure you are using V8.X.X or lower with above code. If you have new Modular SDK V9.0.0+ then change your imports to compat version to keep using existing code:
import firebase from 'firebase/compat/app';
import "firebase/compat/auth"

Related

Error with Firebase Authentication with react native expo

I get this error: TypeError: (0, _firebase.auth) is not a function. (In '(0, _firebase.auth)()', '(0, _firebase.auth)' is an instance of AuthImpl)
My code is:
`
// Import the functions you need from the SDKs you need
import firebase from 'firebase/compat/app';
import { getAuth } from "firebase/auth";
import AsyncStorage from '#react-native-async-storage/async-storage';
import { initializeAuth, getReactNativePersistence} from 'firebase/auth/react-native';
const firebaseConfig = {
};
// Initialize Firebase
const app = firebase.initializeApp(firebaseConfig);
const auth = initializeAuth(app, {
persistence: getReactNativePersistence(AsyncStorage)
});
export { auth };
`
I tried many variations of imports and different ways for the const auth.

firebase signinwithemailandpassword tenanid error

Firebase signinwithemailandpassword is giving tenantid error. I don't get it. Why this error. Any help, pls ?
edit:
i searched on google with no help, thats why i posted in here. any one with any hint even, so that i can move forward
edit 2 - code:
...
import { auth } from "../../firebaseConfig";
import { signInWithEmailAndPassword } from "firebase/auth";
...
signInWithEmailAndPassword(auth, userCreds.email, userCreds.password).then((response) => {
}).catch((error) => {
const errorCode = error.code;
const errorMessage = error.message;
}).finally(() => {
});
Import auth from firebaseInit rather than importing it from firebaseConfig.
Change the auth import to below code
import { auth } from "../../firebaseInit"
issue resolved...
instead of calling config file
import { auth } from "../../firebaseConfig";
i must have called init file
"import { auth } from "../../firebaseInit";"
i have initialzed auth in init file and not in config file... my bad

Uncaught TypeError: firebase_firestore__WEBPACK_IMPORTED_MODULE_3__.doc.data is not a function [duplicate]

This is my first time asking a question on StackOverflow. I am making a school project and I am a beginner at Firebase and JavaScript. I am trying to make a Tinder clone. React is telling me there's an error in this part of my code. At first I had different errors but they were Firebase syntax related and I promptly fixed them but now I don't have a clue on what this error means. My code works on localhost for a split second (I see my application) and then the error appears.
import React, { useEffect, useState } from 'react';
import TinderCard from 'react-tinder-card';
import database from './firebase';
import './SwipeCards.css';
...
function SwipeCards() {
...
useEffect(() => {
database.collection('buddies').onSnapshot((snapshot) => setBuddies(snapshot.docs.map((doc) => doc.data())));
}, []);
...
}
I've tried two solutions of similar problems other people had, namely:
(in my tinderCards.js)
database.firestore().collection('buddies')...
and (in my firebase.js)
import { initializeApp } from 'firebase/app';
import { getFirestore } from 'firebase/firestore';
...
const firebaseApp = initializeApp(firebaseConfig);
const database = getFirestore(firebaseApp);
export default database;
But both didn't work. I can post more of the code if needed. Any help would be greatly appreciated.
You are using the new modular SDK (v9) which no longer uses firebase.firestore() namespace. I'd recommend following the documentation to learn about new syntax:
import database from './firebase';
import { doc, onSnapshot, collection, query, where, onSnapshot } from "firebase/firestore";
useEffect(() => {
const q = query(collection(db, "buddies"))
const unsub = onSnapshot(q, (querySnapshot) => {
console.log("Data", querySnapshot.docs.map(d => doc.data()));
});
}, [])

Firebase: .default is not a constructor

I am trying to follow this tutorial.
I'm currently stuck at the step which introduces react context to firebase.
This code block is the source of the current problem:
import Firebase, { FirebaseContext } from './components/firebase';
ReactDOM.render(
<FirebaseContext.Provider value={new Firebase()}>
<App />
</FirebaseContext.Provider>,
document.getElementById('root'),
);
serviceWorker.unregister();
When I try this, I get an error that says:
TypeError:_components_firebase__WEBPACK_IMPORTED_MODULE_5__.default is not a constructor
I have seen this post, which relates to Vue but says that the cause of an error with .default is not a constructor (not the rest of it), is because Firebase object should not be called with new keyword.
I tried removing new, but that generates an error message that says:
TypeError: Object(...) is not a function
I'm wondering if this has anything to do with the unusual way that the tutorial configures the app for firebase - which is with a class that uses a constructor (still don't understand why this is done this way):
class Firebase {
constructor() {
app.initializeApp(config);
this.auth = app.auth();
this.db = app.database();
}
export default Firebase;
Does anyone using Firebase with React know how to use the context API and if you do, have you found a way around this problem?
The firebase config setup files are:
index:
import FirebaseContext, { withFirebase } from './Context';
import Firebase from '../../firebase.1';
export default Firebase;
export { FirebaseContext, withFirebase };
context:
import React from 'react';
const FirebaseContext = React.createContext(null);
export const withFirebase = Component => props => (
<FirebaseContext.Consumer>
{firebase => <Component {...props} firebase={firebase} />}
</FirebaseContext.Consumer>
);
export default FirebaseContext;
NEXT ATTEMPT
I found this post, which looks like it might have been trying to follow the same tutorial.
That approach requires that I add back the auth method in the firebase.1.js config file so that it now looks like this:
class Firebase {
constructor() {
app.initializeApp(config).firestore();
this.auth = app.auth();
// this.db = app.database();
// this.db = app.firebase.database()
this.db = app.firestore();
}
doCreateUserWithEmailAndPassword = (email, password) =>
this.auth.createUserWithEmailAndPassword(email, password);
}
Then, the submit handler in the form is like this:
handleCreate = values => {
values.preventDefault();
const { name, email, password } = this.state;
Firebase
.doCreateUserWithEmailAndPassword = (email, password) => {
return this.auth
.createUserWithEmailAndPassword(email, password)
.then((res) => {
Firebase.firestore().collection("users").doc(res.user.uid).set({
email: values.email,
name: values.name,
role: values.role,
createdAt: Firebase.FieldValue.serverTimestamp()
}).then(() => this.history.push(ROUTES.DASHBOARD));
})
.catch(err => {
console.log(err.message);
});
};
};
When I try this, I don't get any errors, but the form does not submit - it just hangs.
NEXT ATTEMPT
Since the FirebaseContext.Consumer includes a line with firebase in lowercase, I tried all of the same steps above, but replacing title case Firebase with lower case firebase. I also tried this.firebase (I don't know why) and this.props.firebase (I have seen other posts try that but still don't know why).
None of these approaches work either.
When I try to console.log(Firebase) above the FirebaseContext.Provider, I get this a big log with lots of drop down menus that starts with this:
FirebaseAppImpl {firebase_: {…}, isDeleted_: false, services_: {…},
tokenListeners_: Array(0), analyticsEventRequests_: Array(0), …}
INTERNAL: {analytics: {…}, getUid: ƒ, getToken: ƒ,
addAuthTokenListener: ƒ, removeAuthTokenListener: ƒ}
One of the drop down menus inside this log is labelled "options_" and includes my firebase app credentials.
I think this could be related to the problem in my recent other answer.
I managed to get new Firebase working by simplifying the import/export setup.
In the react app the imports are now:
import { FirebaseContext } from './components/context';
import Firebase from './components/firebase';
Those imports and the new work after I replaced the complicated "import and re-export" code in the components/firebase.js with simply the definition for the class Firebase from the tutorial.
After this another error Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app). pops up, but that could be because I didn't follow the whole tutorial and some configuration is missing.
Replicating everything you are dealing with is quite difficult without having the full source of your project.
Here is the test App.js I used after the npx create-react-app react-firebase-authentication and after installing firebase.
import React from 'react';
import logo from './logo.svg';
import './App.css';
import { FirebaseContext } from './components/context';
import Firebase from './components/firebase';
function App() {
const foo = new Firebase()
return (
<div className="App">
... omitted ...
</div>
);
}
export default App;

Authentication with Firebase and Cloud Firestore

I am trying to figure out how to add authentication to a react app that uses Cloud Firestore rather than Realtime Database.
I followed this tutorial and got the whole thing working. Then - the change I'm trying to add is the move from Realtime Database to Cloud Firestore - this makes a difference to whether authentication works. I have made 20 new projects to try to get this work - totally without the process in the tutorial and just relying on firebase documentation. None of them work.
Currently, I have a config file with:
import app from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
import firestore from "firebase/firestore";
class Firebase {
constructor() {
app.initializeApp(config).firestore();
this.auth = app.default.auth();
// this.db = app.firebase.database()
this.db = app.firestore();
}
Then, i have a form with this submit handler:
import Firebase from '../../../firebase.1';
handleCreate = () => {
const { form } = this.formRef.props;
form.validateFields((err, values) => {
if (err) {
return;
};
const payload = {
// ...values,
name: values.name,
email: values.email,
organisation: values.organisation,
beta: values.beta,
role: values.role,
// createdAt: Firebase.FieldValue.serverTimestamp()
}
console.log("formvalues", payload);
Firebase
.auth()
.createUserWithEmailAndPassword(values.email, values.password)
console.log('Received values of form: ', values);
Firebase
.collection("users")
.add(payload)
// .then(docRef => {
// resetForm(initialValues);
// })
.then(e => this.setState({ modalShow: true }))
form.resetFields();
this.setState({ visible: false });
this.props.history.push(DASHBOARD);
});
};
At the moment, when I console.log(Firebase) I get:
Uncaught ReferenceError: Firebase is not defined
I have seen this post and followed each one of the recommendations in all of the answers.
I have tried changing the config file uses:
this.auth = app.default.auth();
It makes no difference.
When I try to use this, i get an error that says:
TypeError: _firebase_1__WEBPACK_IMPORTED_MODULE_14__.default.auth is not a function
Does anyone know how to use auth with firebase - where there is a Cloud Firestore instead of a Realtime Database - it's so weird that this makes a difference to whether the authentication tool works.
I've turned off the timestamp entry because I can't get firestore to record that either - but that is a problem for another day. I'm really trying to figure out how to use the authentication tool for now.
NEXT ATTEMPT
I tried to change the firebase.js file so that the config now looks like this:
import app from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
const devConfig = {
};
const prodConfig = {
};
const config =
process.env.NODE_ENV === 'production' ? prodConfig : devConfig;
const Firebase = app.initializeApp(config);
const database = app.firestore();
const auth = app.auth();
const settings = { timestampsInSnapshots: true };
export { Firebase, database as default, settings, auth };
Now, I get an error that says:
TypeError: _components_firebase__WEBPACK_IMPORTED_MODULE_2__.default
is not a constructor
I have been googling - what is a constructor. What is a webpack imported module number reference etc for the last few hours. I would love to know how to translate these error messages into something understandable.
Googling this exact error message suggests that something is wrong with the way the import and export statements are made. The new export in firebase.js is unusual (but others on Stack Overflow have tried it with problems using Firebase). It's still a question mark for me because I don't understand what the error message means.
The error message points to this line of my src/index.js
ReactDOM.render(
<FirebaseContext.Provider value={new Firebase()}>
That line comes from:
import FirebaseContext, { withFirebase } from './Context';
import Firebase from '../../firebase.1';
export default Firebase;
export { FirebaseContext, withFirebase };
That file imports from:
import React from 'react';
const FirebaseContext = React.createContext(null);
export const withFirebase = Component => props => (
<FirebaseContext.Consumer>
{firebase => <Component {...props} firebase={firebase} />}
</FirebaseContext.Consumer>
);
export default FirebaseContext;
It would be a huge reveal if anyone has any advice for learning how to learn what error messages mean. For the moment I'm guessing.
I just finished the tutorial recently also, but I simplified my firebase file. I export only the reference to the initialised firebase
import app from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';
const config = {
//...
};
const firebase = app.initializeApp(config);
export default firebase;
And in my project I have:
//...
import firebase from '../../firebase';
//...
useEffect(() => {
const listener = firebase
.firestore()
.collection(COLLECTIONS.USERS)
.onSnapshot(querySnapshot => {
setUsers(querySnapshot);
querySnapshot.forEach(doc => console.log(doc.id, doc.data()));
});
return listener;
}, []);
//...
Check out my Github project here -> https://github.com/henev/react-auth-with-firebase

Resources