Explore Firebase's unified development platform; gain insights into authentication, Firestore, Cloud Functions, and deployment with CLI. Delve into hands-on web application creation and comprehensive tools.

firebase-lessons.tar.gz

REACT_APP_API_KEY

REACT_APP_AUTH_DOMAIN

REACT_APP_PROJECT_ID

REACT_APP_STORAGE_BUCKET

REACT_APP_MESSAGE_SENDER_ID

REACT_APP_APP_ID

TOKEN

PROJECT

Firebase lesson

Firebase-docker-deploys

Firebase-docker-deploys-start

Firebase is a unified application development platform to create, deploy, and monitor web and mobile experiences. It unites common product functions in a single platform, freeing engineers to create functionality and user experience rather than having to create the infrastructure.

This course is a comprehensive introduction to the Firebase 9 SDK through hands-on development of a web application. You’ll start with basic concepts and functions like authentication, database, and Cloud Storage with Firestore. You’ll then learn Cloud Functions for Firebase, environment variables, Security Rules, and hosting capabilities before deploying an application using the command line interface (CLI). At each step, you’ll get hands-on exercises to modify the code, see real-time output in your browser, and finish with an assessment.

By the end of this course, you’ll have all the tools you need to build and deploy a web application with the Firebase 9 SDK—the latest version of Firebase.

A Complete Guide to Firebase on the Web

In the [Introduction to Cloud Functions](https://www.educative.io/courses/complete-guide-firebase-web/introduction-to-cloud-functions#How-it-works)  lesson, we mentioned that Cloud Functions could either be called directly or triggered in response to an event. Since we have a brief overview of how Cloud Functions work, let’s go deeper to see ways in which we can directly invoke our Cloud Functions.

There are three ways we can call Firebase Cloud Functions directly, each with its unique operation and usage. These methods are as follows:

- Schedule a Cloud Function to run at specific times or intervals.
- Trigger a function in response to an HTTP request.
- Calling a Cloud Function directly from the Firebase App. This means calling it from the client.

For this course, we’ll focus on triggering functions via HTTP requests and calling functions directly from an application.

## Trigger via HTTP requests
To write an HTTP request function, we must use the `onRequest` handler that exists on the `functions.https` object. Just like in an Express application, it takes two object parameters, `request` and `response`. The `request` object represents the properties of the request sent by the client, while the `response` object provides a way to send a response back to the client.

We can terminate HTTP functions with either of three following methods on the response object— `.send()`, `.redirect()`, or `.end()`. We already saw an example of a simple HTTP request function in the previous lesson. Now, let’s write something more complex:

In the [Introduction to Cloud Functions](https://www.educative.io/courses/complete-guide-firebase-web/introduction-to-cloud-functions#How-it-works)  lesson, we mentioned that Cloud Functions could either be called directly or triggered in response to an event. Since we have a brief overview of how Cloud Functions work, let’s go deeper to see ways in which we can directly invoke our Cloud Functions.

There are three ways we can call Firebase Cloud Functions directly, each with its unique operation and usage. These methods are as follows:

- Schedule a Cloud Function to run at specific times or intervals.
- Trigger a function in response to an HTTP request.
- Calling a Cloud Function directly from the Firebase App. This means calling it from the client.

For this course, we’ll focus on triggering functions via HTTP requests and calling functions directly from an application.

# Trigger via HTTP requests
To write an HTTP request function, we must use the `onRequest` handler that exists on the `functions.https` object. Just like in an Express application, it takes two object parameters, `request` and `response`. The `request` object represents the properties of the request sent by the client, while the `response` object provides a way to send a response back to the client.

We can terminate HTTP functions with either of three following methods on the response object— `.send()`, `.redirect()`, or `.end()`. We already saw an example of a simple HTTP request function in the previous lesson. Now, let’s write something more complex:

Discover ways to call and trigger Cloud Functions directly.

Introduction

Get Started with Firebase

Firebase Authentication

The Firebase Realtime Database

Cloud Firestore

Cloud Storage for Firebase

The Firebase CLI

Cloud Functions

Environment Variables in Firebase

Firebase Security Rules

Firebase Hosting

Firebase Assessment

Conclusion

Appendix

Trigger Functions Directly