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)

A dive into modern JavaScript

As stated in the introduction, the language has changed for the better in a lot of ways. We now have proper scoping, better handling for async operations, more collection types, and even metaprogramming features such as reflection and proxies. All of these features lead to a more involved language, but they also lead to more effective problem-solving. We will be looking at a few of the best items to come out of the new standards and what they can be used for in our code.

One thing to also note moving forward is that any JavaScript code that is shown can be run in the following ways:

  1. Adding it to the developer's console by hitting F12 on the keyboard
  2. Utilizing snippets in the developer's console that can be seen on the Sources tab, and in the left panel an option should be called Snippets
  3. Writing a base level index.html that has a script...