Book Image

React 18 Design Patterns and Best Practices - Fourth Edition

By : Carlos Santana Roldán
4.2 (6)
Book Image

React 18 Design Patterns and Best Practices - Fourth Edition

4.2 (6)
By: Carlos Santana Roldán

Overview of this book

React helps you work smarter, not harder — but to reap the benefits of this popular JavaScript library and its components, you need a straightforward guide that will teach you how to make the most of it. React 18 Design Patterns and Best Practices will help you use React effectively to make your applications more flexible, easier to maintain, and improve their performance, while giving your workflow a huge boost. With a better organization of topics and knowledge about best practices added to your developer toolbox, the updated fourth edition ensures an enhanced learning experience. The book is split into three parts; the first will teach you the fundamentals of React patterns, the second will dive into how React works, and the third will focus on real-world applications. All the code samples are updated to the latest version of React and you’ll also find plenty of new additions that explore React 18 and Node 19’s newest features, alongside MonoRepo Architecture and a dedicated chapter on TypeScript. By the end of this book, you'll be able to efficiently build and deploy real-world React web applications.
Table of Contents (20 chapters)
18
Other Books You May Enjoy
19
Index

Authentication functions

Step by step, we are putting all the puzzle pieces together. Now, let’s look at the authentication functions we will use to validate whether a user is connected or not and get the user’s data. For this, we need to use JWTs.

JWT is an open standard outlined in RFC 7519 (https://tools.ietf.org/html/rfc7519). It serves as a valuable tool to transmit information between parties as a JSON object. One of the primary advantages of JWTs is their digital signature, which allows them to be easily verified and trusted. The token is signed using the HMAC algorithm and a secret or a public key pair using RSA or ECDSA, ensuring that it remains secure and tamper-proof. This makes JWTs a reliable choice for authentication and authorization purposes in a wide range of applications.

Creating JWT functions

Let’s create some functions that will help verify a JWT and get the user data. For this, we need to create the jwtVerify, getUserData, and...