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

I had same Error and tried to follow the official website but did not work. Then I googled error and landed in this post.

I tried:

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

However, it did not work for me but I added /firebase to the first line import * as firebase from 'firebase/firebase'; and everything is working perfectly.

It also works with require:

const firebase = require("firebase/firebase");
// Required for side-effects
require("firebase/firestore");