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

Installing VS Code

VS Code is the editor we will be using throughout this book. This is mainly because it has an official Deno plugin. There are other editors that provide a pleasant experience with JavaScript and TypeScript, so feel free to use them.

These series of steps are not required for following the rest of this book flawlessly, so feel free to skip them. To install it, follow these steps:

  1. Go to and click the Download button.
  2. Once the download is complete, install it on your system.
  3. Once VS Code is installed, the last step is to install Deno's VS Code plugin.
  4. In the Plugins section (the fifth icon on the left sidebar of VS Code), search for Deno and install the Deno plugin authored by Denoland, which is the official one:

Figure 2.1 – Plugin icon on VS Code's left bar

This is what Deno's VS Code plugin looks like:

Figure 2.2 – Deno extension on the VS Code Marketplace

Figure 2.2 – Deno extension...