Book Image

Learn React with TypeScript 3

By : Carl Rippon
Book Image

Learn React with TypeScript 3

By: Carl Rippon

Overview of this book

React today is one of the most preferred choices for frontend development. Using React with TypeScript enhances development experience and offers a powerful combination to develop high performing web apps. In this book, you’ll learn how to create well structured and reusable react components that are easy to read and maintain by leveraging modern web development techniques. We will start with learning core TypeScript programming concepts before moving on to building reusable React components. You'll learn how to ensure all your components are type-safe by leveraging TypeScript's capabilities, including the latest on Project references, Tuples in rest parameters, and much more. You'll then be introduced to core features of React such as React Router, managing state with Redux and applying logic in lifecycle methods. Further on, you'll discover the latest features of React such as hooks and suspense which will enable you to create powerful function-based components. You'll get to grips with GraphQL web API using Apollo client to make your app more interactive. Finally, you'll learn how to write robust unit tests for React components using Jest. By the end of the book, you'll be well versed with all you need to develop fully featured web apps with React and TypeScript.
Table of Contents (14 chapters)

Writing asynchronous code

TypeScript code is executed synchronously by default, where each line of code is executed after each other. However, TypeScript code can also be asynchronous, which means things can happen independently of our code. Calling a REST API is an example of asynchronous code because the API request is handled outside of our TypeScript code. So, interacting with a REST API forces us to write asynchronous code.

In this section, we'll take the time to understand the approaches we can take when writing asynchronous code before using them to interact with RESTful APIs. We'll start in the next section by looking at callbacks.


A callback is a function we pass as a parameter to an asynchronous...