Why serverless functions extend Firebase - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize Firebase Functions in your project.

Firebase

const functions = require('[1]');

Drag options to blanks, or click blank then click option'

Afirebase-functions

Bfirebase-admin

Cfirebase-auth

Dfirebase-storage

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'firebase-admin' instead of 'firebase-functions' to write functions.

Confusing storage or auth packages with functions.

The firebase-functions package is used to write serverless functions that extend Firebase capabilities.

2fill in blank

medium

Complete the code to create an HTTP triggered serverless function.

Firebase

exports.helloWorld = functions.[1]((req, res) => { res.send('Hello from Firebase!'); });

Drag options to blanks, or click blank then click option'

Ahttps.onCall

Bhttps

Cdatabase

Dhttps.onRequest

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'https' without '.onRequest' which is incomplete.

Using 'https.onCall' which is for callable functions from clients.

The https.onRequest method creates an HTTP function that responds to web requests.

3fill in blank

hard

Fix the error in the function trigger to respond to Firestore document creation.

Firebase

exports.newUser = functions.firestore.document('[1]').onCreate((snap, context) => { console.log('New user added'); });

Drag options to blanks, or click blank then click option'

Ausers/userId

Busers

Cusers/{userId}

Dusers/*

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'users/userId' which listens to a fixed document, not any document.

Using 'users' which is a collection, not a document path.

The path users/{userId} uses a wildcard to trigger on any new user document creation.

4fill in blank

hard

Fill both blanks to create a function that triggers on Firebase Authentication user creation and logs the user ID.

Firebase

exports.logNewUser = functions.auth.user().[1]((user) => { console.log('User ID:', user.[2]); });

Drag options to blanks, or click blank then click option'

AonCreate

Buid

ConDelete

Demail

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'onDelete' instead of 'onCreate' for user creation events.

Accessing 'email' instead of 'uid' when logging user ID.

The onCreate trigger runs when a user is created, and uid accesses the user's unique ID.

5fill in blank

hard

Fill all three blanks to write a Firestore function that updates a user's profile when their document changes.

Firebase

exports.updateUserProfile = functions.firestore.document('[1]').[2]((change, context) => { const newData = change.[3].data(); console.log('Updated data:', newData); });

Drag options to blanks, or click blank then click option'

Ausers/{userId}

BonUpdate

Cafter

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'data' instead of 'after' to get new document data.

Using 'onCreate' instead of 'onUpdate' for document changes.

The function triggers on updates to any user document (users/{userId}) using onUpdate. The new document data is accessed with after.data().