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You're reading from  React and React Native - Fourth Edition

Product typeBook
Published inMay 2022
Reading LevelIntermediate
PublisherPackt
ISBN-139781803231280
Edition4th Edition
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Authors (3):
Adam Boduch
Adam Boduch
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Adam Boduch

Adam Boduch has been involved in large-scale JavaScript development for nearly 15 years. Before moving to the frontend, he worked on several large-scale cloud computing products using Python and Linux. No stranger to complexity, Adam has practical experience with real-world software systems and the scaling challenges they pose.
Read more about Adam Boduch

Roy Derks
Roy Derks
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Roy Derks

Roy Derks is a serial start-up CTO, international speaker, and author from the Netherlands. He has been working with React, React Native, and GraphQL since 2016. You might know him from the book “React Projects – Second Edition”, which was released by Packt earlier this year. Over the last few years, he has inspired tens of thousands of developers worldwide through his talks, books, workshops, and courses.
Read more about Roy Derks

Mikhail Sakhniuk
Mikhail Sakhniuk
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Mikhail Sakhniuk

Mikhail Sakhniuk is Software Engineer with high proficiency in JavaScript, React and React Native. He has more than 5 years of experience in developing web and mobile applications. He has worked for startups, fintech companies, and product companies with more than 20 million users. Currently, Mikhail is working at Miro as a Frontend Engineer. In addition, he owns and maintains a few open-source projects. He also shares his experience and knowledge through books and articles.
Read more about Mikhail Sakhniuk

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Maintaining state using Hooks

The first React Hook API that we'll look at is called useState(), which enables your functional React components to be stateful. Before Hooks were introduced to React, our only option for creating stateful components was to use a class so that we could access the setState() method. In this section, you'll learn how to initialize state values and change the state of a component using Hooks.

Initial state values

When our components are first rendered, they probably expect some state values to be set. This is called the initial state of the component, and we can use the useState() Hook to set the initial state. Let's take a look at an example:

import * as React from "react";
 
export default function App() {
  const [name] = React.useState("Adam");
  const [age] = React.useState(35);
 
  return (
    <>
      <p>My name is...
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React and React Native - Fourth Edition
Published in: May 2022Publisher: PacktISBN-13: 9781803231280

Authors (3)

author image
Adam Boduch

Adam Boduch has been involved in large-scale JavaScript development for nearly 15 years. Before moving to the frontend, he worked on several large-scale cloud computing products using Python and Linux. No stranger to complexity, Adam has practical experience with real-world software systems and the scaling challenges they pose.
Read more about Adam Boduch

author image
Roy Derks

Roy Derks is a serial start-up CTO, international speaker, and author from the Netherlands. He has been working with React, React Native, and GraphQL since 2016. You might know him from the book “React Projects – Second Edition”, which was released by Packt earlier this year. Over the last few years, he has inspired tens of thousands of developers worldwide through his talks, books, workshops, and courses.
Read more about Roy Derks

author image
Mikhail Sakhniuk

Mikhail Sakhniuk is Software Engineer with high proficiency in JavaScript, React and React Native. He has more than 5 years of experience in developing web and mobile applications. He has worked for startups, fintech companies, and product companies with more than 20 million users. Currently, Mikhail is working at Miro as a Frontend Engineer. In addition, he owns and maintains a few open-source projects. He also shares his experience and knowledge through books and articles.
Read more about Mikhail Sakhniuk