React is a JavaScript library created by Facebook to help build applications with components. In React, there are proven methods to solve common problems experienced by React developers. If you are looking for different ways how to choose your pattern when building a React app, then this book is for you. The book starts by sharing the best practices for architecting your React app. It then helps you learn how to create clean, performant, and maintainable React components using JavaScript and TypeScript. The book helps you explore and work with some useful hooks in React. It also helps you learn how to enable server-side rendering for your React app. Later, the book will help you discover ways to style your React components effectively. Towards the end, the book will help you learn how to write tests for your React applications. By the end of the book, you will be able to build complex and maintainable React apps with JavaScript and TypeScript.