How JavaScript Works

JavaScript is a complicated language with a lot of misinformation surrounding how it works. This book provides a comprehensive introduction to JavaScript, from how it works at a technical level to how it is used to create websites and applications. Everything you need to know to start a career in JavaScript development is covered here.

How JavaScript Works begins with a practical introduction of the basics before moving into the technical underpinnings of JavaScript, detailing everything you need to know, including variables, memory storage, functions, classes, types, maps, sets and APIs. Once you’ve fully absorbed these key topics. author Jonathan Simpson will show you how to put them into practice, demonstrating how they are employed for modern web development. You’ll learn how to use JavaScript with HTML and CSS to construct web pages and applications, how to change CSS with JavaScript, and how to utilize Fetch and asynchronous operations.

Upon completing this book, you will have the foundational knowledge necessary to continue your journey to becoming a professional JavaScript developer.

What You Will Learn:

• Gain insight into the technical essentials of JavaScript and how it works
• Learn advanced concepts and such as memory storage and how classes, functions and objects actually work
• Explore the basic mathematical underpinnings of JavaScript
• Understand how JavaScript is used to manipulate HTML and CSS
• Obtain the tools and knowledge needed to start your career in web development

Who This Book Is For:

Anyone interested in a web development career, as well as those who may have already embarked on their careers, but who want to deepen their technical understanding of JavaScript and how it works.

Table of Contents

Chapter 1: Introduction to JavaScript

Chapter 2: Code Structure and Logical Statements

Chapter 3: Introduction to Objects, Arrays

Chapter 4: Loops and Iterables

Chapter 5: References, Values, and Memory Management

Chapter 6: Functions and Classes

Chapter 7: Types

Chapter 8: Manipulating and Interacting with HTML

Chapter 9: Maps and Sets

Chapter 10: Fetching Data, APIs, and Promises

Chapter 11: Introduction to Web APIs

Chapter 12: Errors and the Console

Chapter 13: The Canvas

Chapter 14: Web Workers and Multithreading

About the Author

Jonathon Simpson studied at UCL and is a Product Owner at Revolut and has more than than 12 years of web development experience working on a wide range of products and services. Jonathon also owns and operates a popular software engineering blog focusing on JavaScript.