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)
1
Part 1:Design Patterns
5
Part 2:Architecture and UI Patterns
9
Part 3:Performance and Security Patterns

Page hydration strategies

As we’ve seen in the first section of the chapter, react provides primitives to render applications on the server and the client. However, we only looked at examples where we did exclusively client or server rendering. One key feature of React frameworks such as Next.js is that they allow you to seamlessly switch between static, client, and server rendering. We’ll look at how to achieve this using React primitives.

Figure 5.16: A sequence diagram for a server-rendered page that is subsequently rehydrated on the client

Figure 5.16: A sequence diagram for a server-rendered page that is subsequently rehydrated on the client

We’ll start by extending our React client/server rendering app.jsx with a ClientCounter component. Event handlers are one of the simplest ways to observe interactivity primitives. Our ClientCounter component displays a counter that initializes with 0, and on every click of the Add button, it increments the count value. We put this component in a src/client-counter.jsx file:

import React, ...