/TypeScript/FirebaseError: Firebase: Firebase App named '[DEFAULT'] already exists (app/duplicate-app).

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

Firebase: Firebase App named '[DEFAULT]' already exists

if (!firebase.apps.length) {
   firebase.initializeApp({});
}else {
   firebase.app(); // if already initialized, use that one
}

Source: stackoverflow.com

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

// Config file
import * as firebase from "firebase";

const config = {...};

export default !firebase.apps.length ? firebase.initializeApp(config) : firebase.app();

// Other file
import firebase from '../firebase';
...
console.log(firebase.name);
console.log(firebase.database());

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