Deno Web Development

A curious JavaScript developer's practical guide to deep dive into Deno and get the most out of it for building secure web applications

▶Book Description
Deno is a JavaScript and TypeScript runtime with secure defaults and a great developer experience. With Deno Web Development, you'll learn all about Deno's primitives, its principles, and how you can use them to build real-world applications. The book is divided into three main sections: an introduction to Deno, building an API from scratch, and testing and deploying a Deno application.

The book starts by getting you up to speed with Deno's runtime and the reason why it was developed. You'll explore some of the concepts introduced by Node, why many of them transitioned into Deno, and why new features were introduced. After understanding Deno and why it was created, you will start to experiment with Deno, exploring the toolchain and writing simple scripts and CLI applications. As you progress to the second section, you will create a simple web application and then add more features to it. This application will evolve from a simple 'hello world' API to a web application connected to the database, with users, authentication, and a JavaScript client. In the third section, the book will take you through topics such as dependency management, configuration and testing, finishing with an application deployed in a cloud environment.

By the end of this web development book, you will become comfortable with using Deno to create, maintain, and deploy secure and reliable web applications.

▶What You Will Learn
-Understand why you should use Deno
-Get to grips with tooling and the Deno ecosystem
-Build Deno web applications using existing Node.js knowledge and the newest ECMA Script 6 features
-Explore the standard library and the benefits of Deno's security model
-Discover common practices and web frameworks to build a REST API in Deno
-Structure a web application using common architecture practices
-Test and deploy a Deno application in the cloud using Docker

▶Key Features
-Understand Deno's essential concepts and features
-Learn how to use Deno in real-world scenarios
-Use Deno to develop, test, and deploy web applications and tools

▶Who This Book Is For
This book is for web developers who want to leverage their JavaScript and TypeScript skills in a secure, simple, and modern runtime, using Deno for web app development. Beginner-level knowledge of Node.js is recommended but not required.

▶What this book covers
- Chapter 1, What is Deno?, gives historical context about Node.js and the motivations that led to Deno's creation, presenting the runtime architecture and premises.

- Chapter 2, The Toolchain, covers installing Deno and explores the tools included in the runtime binary.

- Chapter 3, The Runtime and Standard Library, explains about writing simple scripts and applications using Deno's runtime and standard library functions.

- Chapter 4, Building a Web Application, shows how to set up the foundations for a web application using the standard library HTTP module.

- Chapter 5, Adding Users and Migrating to Oak, covers using oak, a popular HTTP library, to build a REST API, and adding persistence and users to the application.

- Chapter 6, Adding Authentication and Connecting to the Database, looks at adding support for authentication and authenticated endpoints, and connecting to a MongoDB database.

- Chapter 7, HTTPS, Extracting Configuration, and Deno in the Browser, looks at enabling HTTP, handling configuration based on files and the environment, and Deno code in the browser.

- Chapter 8, Testing – Unit and Integration, covers writing and running unit and integration tests for the modules written in previous chapters.

- Chapter 9, Deploying a Deno Application, goes into configuring a container environment and automation to deploy a Deno application, getting it running in a cloud environment.

- Chapter 10, What's Next?, gives an overview of what we have learned throughout the book, a roadmap of Deno, explains how to publish a module to Deno's official registry, and talks you through the future and community of Deno.