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

By : Omole

4.5 (2)

Buy this Book

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

4.5 (2)

By: Omole

Buy this Book

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.

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Free Chapter

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

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

Koa Core Concepts

Technical requirements

The application object

The context object

Middleware

Summary

Handling Errors in Koa

Technical requirements

Catching errors in Koa

Throwing HTTP errors

Writing error handlers

Summary

Building an API in Koa

Technical requirements

Project setup

Building the application

Useful notes

Summary

Building an Application in Koa

Technical requirements

About the application

Setting up a project

Building the application

Summary

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A primer on Node

As JavaScript developers who may or may not have experience working with Node.js, a brief introduction to Node.js and its core ideology will help get everyone up to speed. Node.js, or simply Node, is a run-time environment that executes JavaScript outside a browser. In simpler terms, and as it relates to web developers, Node is a platform that allows developers to write JavaScript applications that can also act as servers.

JavaScript became popular for being a language used to manipulate the DOM (Document Object Model) on web pages. It was a language typically used for client-side scripting. Node, which was built on Chrome's open source v8 JavaScript engine, made it possible to run JavaScript both on the browser and the server. This was highly accepted, as developers could now develop applications with the same language on servers and web browsers.

Node is...