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!

Handling events

Events work in a slightly different way across the various browsers. React tries to abstract the way events work and give developers a consistent interface to deal with. This is a great feature of React because we can forget about the browsers we are targeting and write event handlers and functions that are vendor-agnostic.

To offer this feature, React introduced the concept of the synthetic event. A synthetic event is an object that wraps the original event object provided by the browser, and it has the same properties, no matter where it is created.

To attach an event listener to a node and get the event object when the event is fired, we can use a simple convention which recalls the way events are attached to the DOM nodes. In fact, we can use the word on plus the camelCased event name (for example, onKeyDown) to define the callback to be fired when the events...