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

The higher-order component pattern

A higher-order component is a function that takes a component and returns a component. The definition of higher-order components is similar to higher-order functions, which JavaScript supports. Higher-order functions are functions that receive a function as a parameter or return a function.

The higher-order component pattern allows us to pass additional props to a component.

Implementation/example

The following is a simple render prop, withLocation, which injects window.location.href and window.location.origin into a component as props:

const location = {
  href: window.location.href,
  origin: window.location.origin,
};
export function withLocation(Component) {
  return (props) => {
    return <Component location={location} {...props} />;
  };
}

The pattern that’s used when using higher-order components is to export default the higher-order component called...