Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Exploring the options parameter

This section is a deep look at the optional options parameter and how we can develop reusable plugins. A plugin declaration function isn’t anything more than a factory function that, instead of returning some new entity as factory functions usually do, adds behaviors to a Fastify instance. If we look at it like this, we can think about the options parameter as our constructor’s arguments.

Firstly, let’s recall the plugin declaration function signature:

async function myPlugin(fastify, [options])

How can we pass our custom arguments to the options parameter? It turns out that the register method has a second parameter too. So, the object we use as the argument will be passed by Fastify as Plugin’s options parameter:

app.register(myPlugin, { first: 'option'})

Now, inside the myPlugin function, we can access this value simply using options.first.

It is worth mentioning that Fastify reserves three specific...