Book Image

Server Side development with Node.js and Koa.js Quick Start Guide

By : Olayinka Omole
Book Image

Server Side development with Node.js and Koa.js Quick Start Guide

By: Olayinka Omole

Overview of this book

Every developer wants to build modular and scalable web applications. Modern versions of JavaScript have made this possible in Node.js, and Koa is a Node.js framework that makes it easy. This book is the ideal introduction for JavaScript developers who want to create scalable server side applications using Node.js and Koa.js. The book shows you how Koa can be used to start projects from scratch, register custom and existing middleware, read requests, and send responses to users. We will explore the core concepts in Koa, such as error handling, logging, and request and response handling. We will dive into new concepts in JavaScript development, and see how paradigms such as async/await help with modern Node.js application development. By the end of this book, you will be building robust web applications in Koa using modern development paradigms and techniques of Node.js development.

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Table of Contents (8 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Introducing Koa
Introducing Koa
Technical requirements
What is Koa?
What can you do with Koa?
Why choose Koa?
When you should not use Koa
Koa versus Express
How can this book help you understand Koa better?
Summary
2
Getting Started with Koa
Getting Started with Koa
Technical requirements
Modern JavaScript
A primer on Node
What is async... await?
Installing Koa
Using Babel
Starting a server in Koa
Summary
3
Koa Core Concepts
Koa Core Concepts
Technical requirements
The application object
The context object
Middleware
Summary
4
Handling Errors in Koa
Handling Errors in Koa
Technical requirements
Catching errors in Koa
Throwing HTTP errors
Writing error handlers
Summary
5
Building an API in Koa
Building an API in Koa
Technical requirements
Project setup
Building the application
Useful notes
Summary
6
Building an Application in Koa
Building an Application in Koa
Technical requirements
About the application
Setting up a project
Building the application
Summary
7
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think

About the application

Some of the features our application will have include the following:

  • Authentication to restrict access to some parts of the app
  • The ability for users to log in, register, and logout
  • Ability to serve HTML pages to users
  • Ability to CRUD (create, read, update, and delete) blog posts for signed-in users

If you haven't already, it is highly recommended to go through Chapter 5, Building an API in Koa. This will help provide more background information on some of the things we will do in this chapter.

All the code written in this chapter uses the modern JavaScript ES6 syntax.

At the end of this chapter, we will have built a simple blog from scratch in Koa, as seen in this screenshot:

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