Book Image

JavaScript Design Patterns

By : Hugo Di Francesco
Book Image

JavaScript Design Patterns

By: Hugo Di Francesco

Overview of this book

Unlock the potential of JavaScript design patterns, the foundation for development teams seeking structured and reusable solutions to common software development challenges in this guide to improving code maintainability, scalability, and performance. Discover how these patterns equip businesses with cleaner and more maintainable code, promote team collaboration, reduce errors, and save time and costs. This book provides a comprehensive view of design patterns in modern (ES6+) JavaScript with real-world examples of their deployment in professional settings. You’ll start by learning how to use creational, structural, and behavioral design patterns in idiomatic JavaScript, and then shift focus to the architecture and UI patterns. Here, you’ll learn how to apply patterns for libraries such as React and extend them further to general web frontend and micro frontend approaches. The last section of the book introduces and illustrates sets of performance and security patterns, including messaging and events, asset and JavaScript loading strategies, and asynchronous programming performance patterns. Throughout the book, examples featuring React and Next.js, in addition to JavaScript and Web API examples, will help you choose and implement proven design patterns across diverse web ecosystems, transforming the way you approach development.
Table of Contents (16 chapters)
Part 1:Design Patterns
Part 2:Architecture and UI Patterns
Part 3:Performance and Security Patterns

Using Next.js Script’s strategy option to optimize asset loading

The Next.js Script component gives us more control over script loading behavior, allowing us to improve page load performance.

The strategy prop allows us to control the loading strategy; it defaults to afterInteractive, which will begin loading after some of the Next.js code has run. It can be set to beforeInteractive, in which case the script is loaded and executed before all Next.js code. lazyOnLoad can be used for lower-priority scripts to delay loading until there’s browser idle time.

The final option is experimental; it’s the worker strategy, which will load and run the script in a web worker.

Per the Next.js docs for the Script#strategy option, the following list contains the loading strategies of the script (see the docs:

There are four different strategies that can be used:

  • beforeInteractive: Load...