Book Image

React 17 Design Patterns and Best Practices - Third Edition

By : Carlos Santana Roldán
2 (1)
Book Image

React 17 Design Patterns and Best Practices - Third Edition

2 (1)
By: Carlos Santana Roldán

Overview of this book

Filled with useful React patterns that you can use in your projects straight away, this book will help you save time and build better web applications with ease. React 17 Design Patterns and Best Practices is a hands-on guide for those who want to take their coding skills to a new level. You’ll spend most of your time working your way through the principles of writing maintainable and clean code, but you’ll also gain a deeper insight into the inner workings of React. As you progress through the chapters, you’ll learn how to build components that are reusable across the application, how to structure applications, and create forms that actually work. Then you’ll build on your knowledge by exploring how to style React components and optimize them to make applications faster and more responsive. Once you’ve mastered the rest, you’ll learn how to write tests effectively and how to contribute to React and its ecosystem. By the end of this book, you'll be able to avoid the process of trial and error and developmental headaches. Instead, you’ll be able to use your new skills to efficiently build and deploy real-world React web applications you can be proud of.
Table of Contents (21 chapters)
1
Hello React!
4
How React Works
10
Performance, Improvements, and Production!
19
About Packt

Reconciliation

Most of the time, React is fast enough by default, and you do not need to do anything more to improve the performance of your application. React utilizes different techniques to optimize the rendering of the components on the screen.

When React has to display a component, it calls its render method and the render methods of its children recursively. The render method of a component returns a tree of React elements, which React uses to decide which DOM operations have to be done to update the UI.

Whenever the component state changes, React calls the render method on the nodes again, and it compares the result with the previous tree of React elements. The library is smart enough to figure out the minimum set of operations required to apply the expected changes on the screen. This process is called reconciliation, and it is managed transparently by React. Thanks to that, we can easily describe how our components have to look at a given point in time in a declarative way and...