Book Image

Professional JavaScript

By : Hugo Di Francesco, Siyuan Gao, Vinicius Isola, Philip Kirkbride
Book Image

Professional JavaScript

By: Hugo Di Francesco, Siyuan Gao, Vinicius Isola, Philip Kirkbride

Overview of this book

In depth knowledge of JavaScript makes it easier to learn a variety of other frameworks, including React, Angular, and related tools and libraries. This book is designed to help you cover the core JavaScript concepts you need to build modern applications. You'll start by learning how to represent an HTML document in the Document Object Model (DOM). Then, you'll combine your knowledge of the DOM and Node.js to create a web scraper for practical situations. As you read through further lessons, you'll create a Node.js-based RESTful API using the Express library for Node.js. You'll also understand how modular designs can be used for better reusability and collaboration with multiple developers on a single project. Later lessons will guide you through building unit tests, which ensure that the core functionality of your program is not affected over time. The book will also demonstrate how constructors, async/await, and events can load your applications quickly and efficiently. Finally, you'll gain useful insights into functional programming concepts such as immutability, pure functions, and higher-order functions. By the end of this book, you'll have the skills you need to tackle any real-world JavaScript development problem using a modern JavaScript approach, both for the client and server sides.
Table of Contents (12 chapters)


In the previous chapter, we explored the concepts of modular design, ES6 modules, and their use with Node.js. We took our compiled ES6 JavaScript and converted it into a compatible script using Babel.

In this chapter, we'll discuss code quality, which is one of the key qualities of professional JavaScript development. When we start writing code, we tend to focus on solving simple problems and evaluating the outcome. When it comes to the small pet projects that most developers start with, there is little need to communicate with others or work as part of a large team.

As the projects, you work on becoming larger in scope, the importance of code quality increases. In addition to ensuring that the code works, we have to consider other developers who will use the components we create or update the code we write.

There are several aspects of quality code. The first and most obvious is that it does what it is intended to do. This is often easier said than done...