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)

Summary

In this chapter, we explored the DOM specification by learning about its base interfaces, its properties, and its methods. We learned about the relationship between the HTML you write and the tree the browser generates from it. We queried the DOM and navigated the DOM tree. We learned how to create new elements, add them to the tree, and manipulate existing elements. Lastly, we learned how to use Shadow DOM to create isolated DOM trees and custom components that can be easily reused in HTML pages.

In the next chapter, we'll switch gears to the backend world. We'll start learning about Node.js and the basic concepts around it. We'll go through how to install and manage multiple versions of Node.js using nvm, and last but not least, we'll also learn about npm and how to find and use external modules.