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Project Setup

initialize app Firebase configuration multiple apps emulator connection App Check initialization environment configuration project aliases Firebase CLI local emulator suite deployment targets

Authentication

email password signup email password signin signout auth state listener Google provider password reset email verification custom claims ID token auth emulator

Firestore Basics

collection reference document reference add document set document update document delete document get document get collection where query orderBy query

Firestore Advanced

limit query cursor pagination composite indexes transaction batched writes realtime listener server timestamp arrayUnion increment offline persistence

Security Rules

authenticated rule owner rule field validation rule role claim rule query-aware rule Storage rule rule helper function emulator rule test deny by default rule version

Storage & Realtime DB

upload file download URL upload progress delete file storage metadata Realtime Database set Realtime Database update Realtime Database push Realtime Database listener Realtime Database transaction

Cloud Functions & Messaging

callable function HTTP function Firestore trigger Auth trigger scheduled function secret parameter FCM token send notification topic messaging function emulator

Hosting & Operations

hosting rewrite hosting redirect cache headers Remote Config Analytics event Crashlytics concept Performance Monitoring concept deployment preview channel Firebase deploy production checklist

Firebase / Cloud Functions & Messaging

callable function

Learn callable function in Firebase with a dedicated explanation, a topic-specific example, edge guidance, and a mastery check.

12 min read • Advanced

firebase-061.js

javascript

export const markPaid=onCall(async request=>{ if(!request.auth) throw new HttpsError("unauthenticated","Sign in"); return {invoiceId:request.data.invoiceId,status:"paid"}; });

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

callable function Mastery Check →

Realtime Database transaction