How to fix not-found in Firebase

// Firestore example
try {
  const doc = await getDoc(docRef);
  console.log(doc.data());
} catch (error) {
  console.error("Service:", error.code); // firestore/not-found
}

// Cloud Functions example
const response = await fetch('https://region-project.cloudfunctions.net/functionName');
if (!response.ok) {
  console.error("Status:", response.status); // 404
}

// Check error.code or HTTP status to determine the service

import { doc, getDoc } from "firebase/firestore";

const docRef = doc(db, "users", userId);
const docSnap = await getDoc(docRef);

if (docSnap.exists()) {
  console.log("Document data:", docSnap.data());
} else {
  console.log("Document not found - check your path");
  // The document doesn't exist yet - create it if needed
  await setDoc(docRef, { createdAt: new Date() });
}

# List all deployed functions
firebase functions:list

# Deploy a specific function
firebase deploy --only functions:myFunctionName

// Correct format
const url = 'https://REGION-PROJECT_ID.cloudfunctions.net/FUNCTION_NAME';

// Example
const url = 'https://us-central1-my-project.cloudfunctions.net/helloWorld';

// For using emulator locally
const url = process.env.NODE_ENV === 'development'
  ? 'http://localhost:5001/my-project/us-central1/helloWorld'
  : 'https://us-central1-my-project.cloudfunctions.net/helloWorld';

# List deployed sites
firebase hosting:sites:list

# Deploy your site
firebase deploy --only hosting

# Check deployment history
firebase hosting:list

{
  "hosting": {
    "public": "public",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  }
}

import { ref, getBytes } from "firebase/storage";

const fileRef = ref(storage, 'uploads/myfile.pdf');

try {
  const data = await getBytes(fileRef);
  console.log("File exists:", data);
} catch (error) {
  if (error.code === 'storage/object-not-found') {
    console.log("File doesn't exist - check the path");
    // List files to verify paths
    const folderRef = ref(storage, 'uploads/');
  }
}

import { connectFirestoreEmulator, getFirestore } from "firebase/firestore";
import { connectStorageEmulator, getStorage } from "firebase/storage";
import { connectFunctionsEmulator, getFunctions } from "firebase/functions";

const db = getFirestore();
const storage = getStorage();
const functions = getFunctions();

if (process.env.NODE_ENV === 'development') {
  connectFirestoreEmulator(db, 'localhost', 8080);
  connectStorageEmulator(storage, 'localhost', 9199);
  connectFunctionsEmulator(functions, 'localhost', 5001);
}

firebase emulators:start

// Check which project you're connected to
import { getApp } from "firebase/app";
const app = getApp();
console.log("Project ID:", app.options.projectId);

// In Node.js/Admin SDK
import admin from "firebase-admin";
const projectId = admin.app().options.projectId;
console.log("Connected to project:", projectId);

const firebaseConfig = {
  projectId: "my-correct-project-id",
  // ... other config
};