Firebase JavaScript SDK Reference For Node.js

The Firebase JavaScript SDK implements the client-side libraries used by applications using Firebase services. This SDK is distributed via:

To get started using Firebase, see Add Firebase to your JavaScript Project.

For source code, see the Firebase JavaScript SDK Github repo.

API Reference

firebase

firebase.app

App

firebase.auth

firebase.database

firebase.firestore

firebase.functions

firebase.storage

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Last updated 2025-08-07 UTC.