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)


Tuples have had a few enhancements in TypeScript 3, so that they can be used with the popular rest and spread JavaScript syntax. Before we get into the specific enhancements, we'll go through what tuples are, along with what the rest and spread syntax is. A tuple is like an array but the number of elements are fixed. It's a simple way to structure data and use some type safety.

Let's have a play with tuples:

  1. In the TypeScript playground, let's enter the following example of a tuple variable:
let product: [string, number];

We've initialized a product variable to a tuple type with two elements. The first element is a string and the second a number.

  1. We can store a product name and its unit price in the product variable on the next line, as follows:
product = ["Table", 500];
  1. Let's try to store the product name and unit price the...