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Learn React with TypeScript - Second Edition

You're reading from  Learn React with TypeScript - Second Edition

Product type Book
Published in Mar 2023
Publisher Packt
ISBN-13 9781804614204
Pages 474 pages
Edition 2nd Edition
Languages
Author (1):
Carl Rippon Carl Rippon
Profile icon Carl Rippon

Table of Contents (19) Chapters

Preface 1. Part 1: Introduction
2. Chapter 1: Introducing React 3. Chapter 2: Introducing TypeScript 4. Chapter 3: Setting Up React and TypeScript 5. Chapter 4: Using React Hooks 6. Part 2: App Fundamentals
7. Chapter 5: Approaches to Styling React Frontends 8. Chapter 6: Routing with React Router 9. Chapter 7: Working with Forms 10. Part 3: Data
11. Chapter 8: State Management 12. Chapter 9: Interacting with RESTful APIs 13. Chapter 10: Interacting with GraphQL APIs 14. Part 4: Advanced React
15. Chapter 11: Reusable Components 16. Chapter 12: Unit Testing with Jest and React Testing Library 17. Index 18. Other Books You May Enjoy

Using state Hooks

We have already learned about the useState Hook in previous chapters, but here we will look at it again and compare it against another state Hook we haven’t covered yet, useReducer. We will expand the PersonScore component we created in the last section to explore these state Hooks.

Using useState

As a reminder, the useState Hook allows state to be defined in a variable. The syntax for useState is as follows:

const [state, setState] = useState(initialState);

We will enhance the PersonScore component we created in the last section to store the person’s name in state. We will also have state for a score that is incremented, decremented, and reset using some buttons in the component. We will also add the loading state to the component, which will show a loading indicator when true.

Carry out the following steps:

  1. Open PersonScore.tsx and add useState to the React import statement:
    import { useEffect, useState } from 'react&apos...
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