Book Image

React Design Patterns and Best Practices. - Second Edition

Book Image

React Design Patterns and Best Practices. - Second Edition

Overview of this book

React is an adaptable JavaScript library for building complex UIs from small, detached bits called components. This book is designed to take you through the most valuable design patterns in React, helping you learn how to apply design patterns and best practices in real-life situations. You’ll get started by understanding the internals of React, in addition to covering Babel 7 and Create React App 2.0, which will help you write clean and maintainable code. To build on your skills, you will focus on concepts such as class components, stateless components, and pure components. You'll learn about new React features, such as the context API and React Hooks that will enable you to build components, which will be reusable across your applications. The book will then provide insights into the techniques of styling React components and optimizing them to make applications faster and more responsive. In the concluding chapters, you’ll discover ways to write tests more effectively and learn how to contribute to React and its ecosystem. By the end of this book, you will be equipped with the skills you need to tackle any developmental setbacks when working with React. You’ll be able to make your applications more flexible, efficient, and easy to maintain, thereby giving your workflow a boost when it comes to speed, without reducing quality.
Table of Contents (19 chapters)
Free Chapter
1
Section 1: Hello React!
4
Section 2: How React works
9
Section 3: Performance, Improvements and Production!

Spreading properties on DOM elements

There is a common practice that has recently been described as an anti-pattern by Dan Abramov; it also triggers a warning in the console when you do it in your React application.

It is a technique that is widely used in the community and I have personally seen it multiple times in real-world projects. We usually spread the properties to the elements to avoid writing every single one manually, which is shown as follows:

  <Component {...props} />

This works very well and it gets transpiled into the following code by Babel:

  React.createElement(Component, props);

However, when we spread properties into a DOM element, we run the risk of adding unknown HTML attributes, which is bad practice.

The problem is not related only to the spread operator; passing non-standard properties one by one leads to the same issues and warnings. Since the...