Firebase Realtime Database Guide

Realtime Database for Live Updates

Firebase Realtime Database app me instant data sync aur live updates provide karta hai, user experience smooth aur interactive banata hai.

import { getDatabase, ref, set } from "firebase/database"
import { app } from "./firebaseConfig"

const db = getDatabase(app)
set(ref(db, "users/1"), { name: "Ali", age: 25 })

Firestore for Scalable Data

Firestore flexible aur scalable database hai, jo structured data store karne aur query karne me easy aur fast banata hai.

import { getFirestore, doc, setDoc } from "firebase/firestore"
import { app } from "./firebaseConfig"

const db = getFirestore(app)
await setDoc(doc(db, "users", "1"), { name: "Zubair", role: "Developer" })

Firebase Authentication

Firebase Auth secure login aur signup methods provide karta hai, jaise email/password, Google aur social logins.

import { getAuth, signInWithEmailAndPassword } from "firebase/auth"
import { app } from "./firebaseConfig"

const auth = getAuth(app)
signInWithEmailAndPassword(auth, "user@example.com", "password123")
  .then(user => console.log(user))

Cloud Functions for Backend Logic

Cloud Functions serverless backend logic implement karte hain, jaise notifications, triggers aur data processing.

import * as functions from "firebase-functions"

export const helloWorld = functions.https.onRequest((request, response) => {
  response.send("Hello Firebase!")
})

Firebase Storage for File Handling

Firebase Storage secure file uploads aur media management provide karta hai, scalable aur fast delivery ke liye perfect hai.

import { getStorage, ref, uploadBytes } from "firebase/storage"
import { app } from "./firebaseConfig"

const storage = getStorage(app)
const fileRef = ref(storage, "images/photo.png")
await uploadBytes(fileRef, new Blob(["Hello"]))

Push Notifications with FCM

Firebase Cloud Messaging push notifications send karne aur user engagement increase karne ke liye use hota hai.

import { getMessaging, getToken } from "firebase/messaging"
import { app } from "./firebaseConfig"

const messaging = getMessaging(app)
const token = await getToken(messaging)
console.log("FCM Token:", token)

Realtime Database for Live Updates

Firebase Realtime Database app me instant data sync aur live updates provide karta hai, user experience smooth aur interactive banata hai.

import { getDatabase, ref, set } from "firebase/database"
import { app } from "./firebaseConfig"

const db = getDatabase(app)
set(ref(db, "users/1"), { name: "Ali", age: 25 })

Firestore for Scalable Data

Firestore flexible aur scalable database hai, jo structured data store karne aur query karne me easy aur fast banata hai.

import { getFirestore, doc, setDoc } from "firebase/firestore"
import { app } from "./firebaseConfig"

const db = getFirestore(app)
await setDoc(doc(db, "users", "1"), { name: "Zubair", role: "Developer" })

Firebase Authentication

Firebase Auth secure login aur signup methods provide karta hai, jaise email/password, Google aur social logins.

import { getAuth, signInWithEmailAndPassword } from "firebase/auth"
import { app } from "./firebaseConfig"

const auth = getAuth(app)
signInWithEmailAndPassword(auth, "user@example.com", "password123")
  .then(user => console.log(user))

Cloud Functions for Backend Logic

Cloud Functions serverless backend logic implement karte hain, jaise notifications, triggers aur data processing.

import * as functions from "firebase-functions"

export const helloWorld = functions.https.onRequest((request, response) => {
  response.send("Hello Firebase!")
})

Firebase Storage for File Handling

Firebase Storage secure file uploads aur media management provide karta hai, scalable aur fast delivery ke liye perfect hai.

import { getStorage, ref, uploadBytes } from "firebase/storage"
import { app } from "./firebaseConfig"

const storage = getStorage(app)
const fileRef = ref(storage, "images/photo.png")
await uploadBytes(fileRef, new Blob(["Hello"]))

Push Notifications with FCM

Firebase Cloud Messaging push notifications send karne aur user engagement increase karne ke liye use hota hai.

import { getMessaging, getToken } from "firebase/messaging"
import { app } from "./firebaseConfig"

const messaging = getMessaging(app)
const token = await getToken(messaging)
console.log("FCM Token:", token)

Firebase Hosting for Deployment

Firebase Hosting fast aur secure static site deployment aur CDN support provide karta hai, production apps ke liye ideal hai.

firebase init hosting
firebase deploy

Real-Time Listeners for Data Sync

Realtime listeners app ko live updates ke saath sync karte hain, jaise chat apps aur dashboards me required hai.

import { getDatabase, ref, onValue } from "firebase/database"
import { app } from "./firebaseConfig"

const db = getDatabase(app)
onValue(ref(db, "users/1"), snapshot => {
  console.log(snapshot.val())
})

Role-Based Access Control

Firebase rules aur custom claims se user roles manage hote hain, aur app ke data ko secure rakha jata hai.

{
  "rules": {
    "users": {
      "$uid": {
        ".read": "$uid === auth.uid",
        ".write": "$uid === auth.uid"
      }
    }
  }
}