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)


We started the chapter by introducing ourselves to Redux, learning the principles and key concepts. We learned that the state is stored in a single object and changed by pure functions called reducers when actions are dispatched.

We created our own store in our React shop to put the theory into practice. Here are some key points we learned in our implementation:

  • Enumerations for action types give us nice IntelliSense when referencing them.
  • Using interfaces to define the actions gives a nice level of type safety and allows us to create a union type that a reducer can use for the actions it has to deal with.
  • Using read-only properties within the state interface helps us avoid mutating the state directly.
  • Synchronous action creators simply return the required action object.
  • Asynchronous action creators return a function that eventually returns the action object.
  • The reducer...