Book Image

JavaScript Concurrency

By : Adam Boduch
Book Image

JavaScript Concurrency

By: Adam Boduch

Overview of this book

Concurrent programming may sound abstract and complex, but it helps to deliver a better user experience. With single threaded JavaScript, applications lack dynamism. This means that when JavaScript code is running, nothing else can happen. The DOM can’t update, which means the UI freezes. In a world where users expect speed and responsiveness – in all senses of the word – this is something no developer can afford. Fortunately, JavaScript has evolved to adopt concurrent capabilities – one of the reasons why it is still at the forefront of modern web development. This book helps you dive into concurrent JavaScript, and demonstrates how to apply its core principles and key techniques and tools to a range of complex development challenges. Built around the three core principles of concurrency – parallelism, synchronization, and conservation – you’ll learn everything you need to unlock a more efficient and dynamic JavaScript, to lay the foundations of even better user experiences. Throughout the book you’ll learn how to put these principles into action by using a range of development approaches. Covering everything from JavaScript promises, web workers, generators and functional programming techniques, everything you learn will have a real impact on the performance of your applications. You’ll also learn how to move between client and server, for a more frictionless and fully realized approach to development. With further guidance on concurrent programming with Node.js, JavaScript Concurrency is committed to making you a better web developer. The best developers know that great design is about more than the UI – with concurrency, you can be confident every your project will be expertly designed to guarantee its dynamism and power.
Table of Contents (17 chapters)
JavaScript Concurrency
About the Author
About the Reviewer

Functional programming

Functions are obviously central to functional programming. But then, so is the data that flows through our application. In fact, the data and its movement in a program is probably just as important as the implementation of the functions themselves, at least as far application design is concerned.

There's a strong affinity between functional programming and concurrent programming. In this section, we'll look at why this is, and how we can apply functional programming techniques that can result in stronger concurrent code.

Data in, data out

Functional programming is just as powerful as other programming paradigms. It's a different way of tackling the same problems. We use a different set of tools. For example, functions are the building blocks, and we'll use them to build our abstractions around data transformations. Imperative programming, on the other hand, use constructs, such as classes to build abstractions. The fundamental difference is that classes and objects like...