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Learn React Hooks

You're reading from   Learn React Hooks Build and refactor modern React.js applications using Hooks

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Product type Paperback
Published in Oct 2019
Publisher Packt
ISBN-13 9781838641443
Length 426 pages
Edition 1st Edition
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Author (1):
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Daniel Bugl Daniel Bugl
Author Profile Icon Daniel Bugl
Daniel Bugl
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Table of Contents (19) Chapters Close

Preface 1. Section 1: Introduction to Hooks
2. Introducing React and React Hooks FREE CHAPTER 3. Using the State Hook 4. Writing Your First Application with React Hooks 5. Section 2: Understanding Hooks in Depth
6. Using the Reducer and Effect Hooks 7. Implementing React Context 8. Implementing Requests and React Suspense 9. Using Hooks for Routing 10. Using Community Hooks 11. Rules of Hooks 12. Building Your Own Hooks 13. Section 3: Integration and Migration
14. Migrating from React Class Components 15. Redux and Hooks 16. MobX and Hooks 17. Assessments 18. Other Books You May Enjoy

Problems with our simple Hook implementation

If we run our Hook implementation now, we are going to notice that when our component rerenders, the state gets reset, so we cannot enter any text in the field. This is due to the reinitialization of the value variable every time our component gets rendered, which happens because we call useState each time we render the component.

In the upcoming sections, we are going to solve this problem by using a global variable and then turn the simple value into an array, allowing us to define multiple Hooks.

Using a global variable

As we have learned, the value is stored within the closure that is defined by the useState function. Every time the component rerenders, the closure is reinitialized...

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