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Learning JavaScript Design Patterns - A JavaScript and React Developer's Guide

JavaScript JavaScript

Learning JavaScript Design Patterns - A JavaScript and React Developer's Guide

Autor: Addy Osmani
Broj strana: 296
ISBN broj: 978-1098139872
Izdavač: O'Reilly O'Reilly
Godina izdanja: 2023.

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Do you want to write beautiful, structured, and maintainable JavaScript by applying modern design patterns to the language?

Do you want clean, efficient, manageable code? Want to stay up-to-date with the latest best practices? If so, the updated second edition of Learning JavaScript Design Patterns is the ideal place to start.

Author Addy Osmani shows you how to apply modern design patterns to JavaScript and React—including modules, mixins, observers, and mediators. You'll learn about performance and rendering patterns such as server-side rendering and Islands architecture. You'll also learn how architectural patterns like MVC, MVP, and MVVM are useful from the perspective of a modern web application developer.

This book explores:

  • Architectural patterns for structuring your components and apps
  • More than 20 design patterns in JavaScript and React, applicable for developers at any level
  • Different pattern categories including creational, structural, and behavioral
  • Essential performance patterns including dynamic imports and code-splitting
  • Rendering patterns such as server-side rendering, hydration, Islands architecture, and more

    Additionally, you'll explore modern JavaScript syntax like JavaScript modules, React patterns like Hooks, higher-order components (HOCs), and more, to stay ahead in the ever-evolving world of web development.

From the Preface

The world of JavaScript has come a long way since I wrote the first edition of Learning JavaScript Design Patterns over 10 years ago. At that time, I was working on large-scale web applications and found that the lack of structure and organization in JavaScript code made it difficult to maintain and scale those applications.

Fast forward to today, and the web development landscape has changed dramatically. JavaScript has become one of the most popular programming languages in the world and is used for everything from simple scripts to complex web applications. The JavaScript language has evolved to include modules, promises, and async/await, which has heavily influenced how we architect applications. The way developers write components, such as with React, has also significantly impacted how they think about maintainability. This has resulted in the need for modern patterns that take these new changes into account.


With the rise of modern libraries and frameworks like React, Vue, and Angular, developers are now building applications that are more complex than ever before. I recognized the need for an updated version of Learning JavaScript Design Patterns to reflect the changes in JavaScript and web application development.

In this second edition of Learning JavaScript Design Patterns, I aim to help developers apply modern design patterns to their JavaScript code and React applications. The book covers more than 20 design patterns essential for building maintainable and scalable applications. The book is not just about design patterns but also about rendering and performance patterns, which are critical to the success of modern web applications.

The first edition of this book focused on classical design patterns, such as the Module pattern, the Observer pattern, and the Mediator pattern. These patterns are still important and relevant today, but the web development world has evolved significantly in the past decade, and new patterns have emerged. This new edition covers these new patterns, such as promises, async/await, and the newer variations of the Module pattern. We also cover architectural patterns such as MVC, MVP, and MVVM and discuss where modern frameworks fit with these architectural patterns.

Today’s developers are exposed to many library-specific or framework-specific design patterns. React’s matured ecosystem and utilization of newer JS primitives provide an excellent launchpad to talk about best practices and patterns in the framework or library context. In addition to classic design patterns, this book covers modern React patterns, such as Hooks, Higher-Order Components, and Render Props. These patterns are specific to React and essential for building modern web applications using this popular framework.

This book is not just about patterns; it’s also about best practices. We cover topics such as code organization, performance, and rendering, which are crucial for building high-quality web applications. You will learn about dynamic imports, code-splitting, server-side rendering, hydration, and Islands architecture, all of which are essential for building fast and responsive web applications.

By the end of this book, you will have a deep understanding of design patterns and how to apply them to your JavaScript code and React applications. You will also know which patterns are relevant to the modern web and which are not. This book is not just a reference for patterns; it’s also a guide to building high-quality web applications. You will learn how to structure your code for maximum maintainability and scalability and how to optimize your code for performance.

About the Author

Addy Osmani is an Engineering Leader working on Google Chrome. He leads Chrome's Developer Experience teams, helping to keep the web fast and delightful to build. Addy has authored several open-source projects as well as a number of books including Learning Patterns, Learning JavaScript Design Patterns, and Image Optimization. His personal blog is


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