firebase.firestore() is not a function when trying to initialize Cloud Firestore

Question

When I try to initialize Firebase Cloud Firestore, I ran into the following error:

Uncaught TypeError: WEBPACK_IMPORTED_MODULE_0_firebase

Answer 1

You can create a separate component for initialization of firebase on you application using credentials.

firebase-context.js

import * as firebase from 'firebase'
import 'firebase/firestore';

const firebaseConfig = {
            apiKey: "XXXX",
            authDomain: "XXXXX.firebaseapp.com",
            databaseURL: "https://XXXX-app-web.firebaseio.com",
            projectId: "XXXX",
            storageBucket: "XXXX-app-web.appspot.com",
            messagingSenderId: "XXXXXX",
            appId: "1:XXX:web:XXXX",
            measurementId: "G-XXXX"
        };

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

In case, you need to deal with database operation you don't need to call the initialize method each time, you can use common component method which is earlier created.

import FirebaseContext from "./firebase-context";

export const getList = () => dispatch => {
    FirebaseContext.collection("Account")
        .get()
        .then(querySnapshot => {
            // success code
        }).catch(err => {
            // error code
        });
}