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)

Higher-order components

A higher-order component (HOC) is a functional component that takes in a component as a parameter and returns an enhanced version of that component. That may not make a lot of sense, so we're going to go through an example in this section. Our example creates a HOC called withLoader that can be applied to any component in order to add a loading spinner when the component is busy. We are going to use this in our React shop (that we worked on in the last section) in the product page whilst data is being fetched. It will look like the following when we have finished:

Adding asynchronous data fetching

At the moment, the data fetching in our shop is instantaneous because all the data is local. So,...