firebase.auth().createUserWithEmailAndPassword Undefined is not a function

Question

I am following the firebase documentation on user management

var firebase = require('firebase');

// Initialize Firebase
firebase.initializeApp({
    serviceAccount: "./<mysecreturledittedout>.json",
    databaseURL: "https://<mydatabaseurljusttobesafe>.firebaseio.com"
});

router.get('/create', function(req, res){
    var email = req.email;
    var password = req.password;
    firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(err){ // LINE 27 CRASH
        var errorCode = err.code;
        var errorMessage = error.message;
        console.log("ERROR");
        console.log(errorCode, errorMessage);
    });
});

I get the following error

undefined is not a function

TypeError: undefined is not a function
    at d:\Users\Kitty\Code\Practice2\routes\index.js:27:21

From doing a little bit of research, I think undefined is not a function is basically a javascript version of a null pointer exception (could be wrong)

I have configured my service account and project on firebase. I am running this on localhost. Thanks. I am looking primarily for debugging tips, as I'm not sure how to test what isn't working.

Answer 1

If you haven't fixed the problem yet, I found out why it's giving such an error and that's because it really isn't a function.

You're using the Web reference as your guide when you need to be using the Server reference: https://firebase.google.com/docs/reference/node/firebase.auth.Auth .

As you can see, firebase.auth.Auth is a lot different on the Node.js API when compared to the Web API as there's not a lot in there. Now you have to deal with tokens, which I haven't looked deep into, if using the Server API. On the other hand, you can just use the Web API, which does things you intended to do.

Answer 2

Update
Sometime at or before firebase 3.4.1 for Node.js, createUserWithEmailAndPassword became available.

Original
As of firebase 3.1.0 for Node.js, createUserWithEmailAndPassword is not yet supported. According to a response on the firebase Google group, not all platforms have feature parity in the 3.x libraries yet. The REST interface does support user creation but is clearly a different approach than using the Node.js library.

Go to https://groups.google.com/forum/#!forum/firebase-talk and search for createUserWithEmailAndPassword for the latest on that discussion.

Answer 3

I am not sure this is correct, but it helps:

1. In console.firebase.google.com get script:

 <script src="https://www.gstatic.com/firebasejs/live/3.0/firebase.js"></script>

and Config:

 var config = { apiKey: "xxxxxxxxxxxxxxx", authDomain: "project-nnnnnnnnnnn.firebaseapp.com", databaseURL: "https://project-nnnnnnnnnnn.firebaseio.com", storageBucket: "project-nnnnnnnnnnn.appspot.com", };

2. Copy firebase.js file from

 <script src="https://www.gstatic.com/firebasejs/live/3.0/firebase.js"></script>

to local project fb/firebase.js

3. In firebas-service.ts:

 var firebase = require('./fb/firebase'); // Initialize Firebase var config = { apiKey: "xxxxxxxxxxxxxxx", authDomain: "project-nnnnnnnnnnn.firebaseapp.com", databaseURL: "https://project-nnnnnnnnnnn.firebaseio.com", storageBucket: "project-nnnnnnnnnnn.appspot.com", }; firebase.initializeApp(config); export function createUser (email : string, password:string){ firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(error) { if (error.code){ // Handle Errors here. var errorCode = error.code; var errorMessage = error.message; alert(errorMessage); console.log(errorMessage); } else{ // ... } }); }

Answer 4

Could this be because you defined the error as "err", but under errorMessage, "error.message" was the code? Not quite sure, but try this and see if it fixes:

var firebase = require('firebase');

// Initialize Firebase
firebase.initializeApp({
    serviceAccount: "./<mysecreturledittedout>.json",
    databaseURL: "https://<mydatabaseurljusttobesafe>.firebaseio.com"
});

router.get('/create', function(req, res){
    var email = req.email;
    var password = req.password;
    firebase.auth().createUserWithEmailAndPassword(email, password).catch(function(error){ 
        var errorCode = error.code;
        var errorMessage = error.message;
        console.log("ERROR");
        console.log(errorCode, errorMessage);
    });
});

Answer 5

Question is old and I didn't see any accepted answer. And for the other people who still face the same problem. This is what I did to resolve my issue.

• Remove the node_modules
• Remove the firebase from package.json and install the latest firebase npm install --save firebase
• And run npm install once again so that all other dependencies also get installed

After that add

var firebase = require("firebase/app");
require("firebase/firestore");
require("firebase/auth");

Whatever module you want to use in your project, you can mentioned accordingly. Then initialise the firebase

const firebaseConfig = {
    apiKey: "XXXXXXXXXXXXXXXXXXXXXXX",
    authDomain: "XXXXXXXXXXXXXXX",
    databaseURL: "https://XXXXXX.COM",
    projectId: "XXXXXXXXX",
    storageBucket: "XXXXXXXXX",
    messagingSenderId: "XXXXXXXX",
    appId: "XXXXXXXXXXXXX",
    measurementId: "XXXXXXX"
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);

Later you can write your API to create user with email and password

app.post('/register', function(req, res) {
    var emailId = req.email
    var password = req.password;
    firebase.auth().createUserWithEmailAndPassword(emailId, password).catch(function(error) {
      // Handle Errors here.
      console.log(error)
    });

})