Book Image

Hands-On JavaScript High Performance

By : Justin Scherer
1 (1)
Book Image

Hands-On JavaScript High Performance

1 (1)
By: Justin Scherer

Overview of this book

High-performance web development is all about cutting through the complexities in different layers of a web app and building services and APIs that improve the speed and performance of your apps on the browser. With emerging web technologies, building scalable websites and sustainable web apps is smoother than ever. This book starts by taking you through the web frontend, popular web development practices, and the latest version of ES and JavaScript. You'll work with Node.js and learn how to build web apps without a framework. The book consists of three hands-on examples that help you understand JavaScript applications at both the server-side and the client-side using Node.js and Svelte.js. Each chapter covers modern techniques such as DOM manipulation and V8 engine optimization to strengthen your understanding of the web. Finally, you’ll delve into advanced topics such as CI/CD and how you can harness their capabilities to speed up your web development dramatically. By the end of this web development book, you'll have understood how the JavaScript landscape has evolved, not just for the frontend but also for the backend, and be ready to use new tools and techniques to solve common web problems.
Table of Contents (15 chapters)

Using JSON

As stated previously, JSON provides an easy-to-use and easy-to-operate interface for sending and receiving messages between services. For those that do not know, JSON stands for JavaScript Object Notation, which is one of the reasons that it interfaces with JavaScript so well. It mimics a lot of the behavior that JavaScript's objects do, except for some fundamental types (things such as functions). This also makes it quite easy to parse. We could use something such as the built-in JSON.parse function to turn stringified versions of JSON into objects, or JSON.stringify to turn one of our objects into its over-the-wire format.

So what are some of the disadvantages when utilizing JSON? We first have the problem that the format can get very verbose when sending data over the wire. Consider an array of objects that have the following format:

{
"name" :...