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


Hopefully, this walk-through of a silly chat application has given you a new appreciation of what's involved with designing concurrent JavaScript applications end-to-end. This book started off with a high-level overview of what concurrency is, especially in the context of a JavaScript application, because it is different from other programming language environments. Then, we introduced some guiding principles to help us along the way.

The chapters where we took a disciplined look at the various language and environment concurrency mechanisms are really just a means to an end. The ultimate end game for us—the JavaScript programmers and architects—is an application that's free of concurrency issues. This is a broad statement, but at the end of the day, many issues that we face in our web applications are a direct result of inadequate concurrency design.

So use these principles. Use the awesome concurrency features available in JavaScript. Combine these two things to make great applications...