Error 9 in Firebase: The function 'initializeApp' could not be located within the 'firebase/app' module

Since updating to firebase 9, I've been encountering issues with importing certain functions that were working fine on firebase 8. I've gone through the documentation and made necessary code improvements, but the error persists. This issue is not limited to just one import.

The imports in question are:

import { initializeApp } from 'firebase/app'
import { getDatabase } from 'firebase/database'
import { getAuth, signInWithCustomToken, onAuthStateChanged } from 'firebase/auth'

The specific error message reads:

Export 'initializeApp' was not found in 'firebase/app'

I also attempted using the compat libraries:

import { initializeApp } from 'firebase/compat/app'
import { getDatabase } from 'firebase/compat/database'
import { getAuth, signInWithCustomToken, onAuthStateChanged } from 'firebase/compat/auth'

However, the warning persisted, stating:

WARNING "export 'initializeApp' was not found in 'firebase/compat/app'

This issue extends to other imports as well. Any suggestions or assistance would be greatly appreciated.

javascriptfirebase

Answer №1

The version labeled compat utilizes the V8 name-space syntax and does not necessitate separate imports for each function, unlike the newer modular/functional syntax:

import firebase from 'firebase/compat/app'
import 'firebase/compat/database'
import 'firebase/compat/auth'

// import { getAuth } from 'firebase/auth' <-- This is only required in the Modular version

If you opt to use the compat version, be sure to refer to the documentation section that corresponds to the namespaced version:

https://i.sstatic.net/t0YV9.png

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