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React Key Concepts

You're reading from   React Key Concepts An in-depth guide to React's core features

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Product type Paperback
Published in Jan 2025
Publisher Packt
ISBN-13 9781836202271
Length 544 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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Maximilian Schwarzmüller Maximilian Schwarzmüller
Author Profile Icon Maximilian Schwarzmüller
Maximilian Schwarzmüller
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Toc

Table of Contents (21) Chapters Close

Preface 1. React – What and Why 2. Understanding React Components and JSX FREE CHAPTER 3. Components and Props 4. Working with Events and State 5. Rendering Lists and Conditional Content 6. Styling React Apps 7. Portals and Refs 8. Handling Side Effects 9. Handling User Input & Forms with Form Actions 10. Behind the Scenes of React and Optimization Opportunities 11. Working with Complex State 12. Building Custom React Hooks 13. Multipage Apps with React Router 14. Managing Data with React Router 15. Server-side Rendering & Building Fullstack Apps with Next.js 16. React Server Components & Server Actions 17. Understanding React Suspense & The use() Hook 18. Next Steps and Further Resources 19. Other Books You May Enjoy 20. Index

Limitations of useState( )

Thus far in this chapter, the complexity of cross-component state has been explored. But state management can also get challenging in scenarios where some state is only used inside a single component.

useState() is a great tool for state management in most scenarios (of course, right now, it's also the only tool that's been covered). Therefore, useState() should be your default choice for managing state. But useState() can reach its limits if you need to derive a new state value that's based on the value of another state variable, as in this example:

setIsLoading(fetchedPosts ? false : true);

This short snippet is taken from a component where an HTTP request is sent to fetch some blog posts.

You'll find the complete example code on GitHub at https://github.com/mschwarzmueller/book-react-key-concepts-e2/tree/11-complex-state/examples/04-complex-usestate. You will also see more excerpts from the code later in this chapter.

When initiating...

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