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

To use firestore you need to add this link at the top of your html page.

//After initializing firebase, in your main javascript page call...
var data = firebase.firestore();