Firebase cannot retrieve data from database “db.collection is not a function”

Question

Cannot get anything from the firebase database. It is showing an error of:

Uncaught TypeError: db.collection is not a function

I have the script

Answer 1

Change this:

const db = firebase.database();

into this:

const db = firebase.firestore();

Since you are using firestore and not realtime database.

more info here:

https://firebase.google.com/docs/firestore/quickstart#initialize