firebase app named '[default]' already exists (app/duplicate-app) React-Native

5 years ago Views 6392 Visit Post Reply

I am using Firebase Real-time Database to React Native, I have imported Firebase like

import firebase from 'firebase';

var configure Firebase= {

apiKey: "FULL_API_KEY_PUT_HERE",

authDomain: "FULL_AUTHDOMAIN_PUT_HERE",

databaseURL: "https://FULL_databaseURL_PUT_HERE.com",

storageBucket: "FULL_storageBucket_PUT_HEREappspot.com",

};

const fireabaseConfig=firebase.initializeApp(configure Firebase);

export default class HomeScreen extends Component {

//.............Remain Business Logic here...............

}

after this snippet when I run the code it works fine first time but after some time it gives me the error

firebase app named '[default]' already exists (app/duplicate-app)

Posted byHemant Sharma

Thread Reply

Hemant Sharma

- 5 years ago

Firebase App named '[DEFAULT]' already exists (app/duplicate-app)

This error occurs when you trying to initialize firebase again and again. It should be initialized at once and use to avoid Firebase app named '[DEFAULT]' already exists you have to change your initialization style.

import firebase from 'firebase';

try {

firebase.initializeApp({

apiKey: "FULL_API_KEY_PUT_HERE",

authDomain: "FULL_AUTHDOMAIN_PUT_HERE",

databaseURL: "https://FULL_databaseURL_PUT_HERE.com",

storageBucket: "FULL_storageBucket_PUT_HEREappspot.com",

})

} catch (err) {

// we skip the "already exists" message which is

// not an actual error when we're hot-reloading

if (!/already exists/.test(err.message)) {

console.error('Firebase initialization error raised', err.stack)

}}

const firebaseApp= firebase;

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