Book Image

Deno Web Development

By : Alexandre Portela dos Santos
Book Image

Deno Web Development

By: Alexandre Portela dos Santos

Overview of this book

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.
Table of Contents (15 chapters)
Section 1: Getting Familiar with Deno
Section 2: Building an Application
Section 3: Testing and Deploying

Using the standard library

In this section, we'll explore the behavior provided by Deno's standard library. It is currently not considered stable by the runtime and thus modules are separately versioned. At the time we're writing, the standard library is at version 0.83.0.

As we previously mentioned, Deno is very meticulous in what it adds to the standard library. The core team wants it to provide enough behavior, so people don't need to rely on millions of external packages to do certain things, but at the same time doesn't want to add too much of an API surface. This is a fine balance that is hard to strike.

With the assumed inspiration of golang, most of the Deno standard library functions mimic the language created by Google. This happens because the Deno team truly believes in the way golang evolved its standard library, one that is commonly known for being well polished. As a funny note, Ryan Dahl (Deno and Node creator) mentions in one of his...