Book Image

Learn ECMAScript - Second Edition

By : MEHUL MOHAN, Narayan Prusty
Book Image

Learn ECMAScript - Second Edition

By: MEHUL MOHAN, Narayan Prusty

Overview of this book

Learn ECMAScript explores implementation of the latest ECMAScript features to add to your developer toolbox, helping you to progress to an advanced level. Learn to add 1 to a variable andsafely access shared memory data within multiple threads to avoid race conditions. You’ll start the book by building on your existing knowledge of JavaScript, covering performing arithmetic operations, using arrow functions and dealing with closures. Next, you will grasp the most commonly used ECMAScript skills such as reflection, proxies, and classes. Furthermore, you’ll learn modularizing the JS code base, implementing JS on the web and how the modern HTML5 + JS APIs provide power to developers on the web. Finally, you will learn the deeper parts of the language, which include making JavaScript multithreaded with dedicated and shared web workers, memory management, shared memory, and atomics. It doesn’t end here; this book is 100% compatible with ES.Next. By the end of this book, you'll have fully mastered all the features of ECMAScript!
Table of Contents (18 chapters)
Title Page

Chapter 5. Modular Programming

Modular programming is one of the most important and frequently used software design techniques. Modular programming basically means splitting your code into multiple files that are usually independent of each other. This makes it a cake-walk when managing and maintaining different modules of a program. It helps in debugging nasty bugs easily, pushing updates to a particular module, and so on.

Unfortunately, for a long time, JavaScript didn't support modules natively; that led programmers to use alternative techniques to achieve modular programming in JavaScript. However, ES6 introduced a native modular technique in JavaScript for the first time.

This chapter is all about how to create and import JavaScript modules. In this chapter, we will first learn how modules were created earlier, and then we will jump to the new built-in JavaScript module system.

In this chapter, we'll cover:

  • What is modular programming?
  • The benefits of modular programming
  • The basics of IIFE...