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

If by any chance, your code is under witchcraft, and import firebase/firestore won't work, then include it directly:

import '@firebase/firestore/dist/esm/index';

If it's not there, then:

npm install @firebase/firestore