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

Structuring a web application

When starting an application, it's important that we spend some time thinking about its structure and architecture. That's where there this section will start: by looking at the backbone of application architecture. We'll have a look at what advantages it brings and align ourselves with a set of principles that will help us scale it as the application grows.

Then, we'll develop what will become the application's first endpoint. However, first, we'll start with the business logic. The persistency layer will follow, and we'll finish by looking at an HTTP endpoint that will act as the application's entry point.

Deno as an unopinionated tool

When we're using tools that are low level and delegate many decisions to developers, such as Node.js and Deno, structuring an application is one of the big challenges that arises.

This is very different compared to an opinionated web framework, such as PHP Symfony...