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React Key Concepts

You're reading from   React Key Concepts Consolidate your knowledge of React's core features

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Product type Paperback
Published in Dec 2022
Publisher Packt
ISBN-13 9781803234502
Length 590 pages
Edition 1st Edition
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 (16) Chapters Close

Preface
1. React – What and Why FREE CHAPTER 2. Understanding React Components and JSX 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. Behind the Scenes of React and Optimization Opportunities 10. Working with Complex State 11. Building Custom React Hooks 12. Multipage Apps with React Router 13. Managing Data with React Router 14. Next Steps and Further Resources Appendix

What Does React Do with All These Components?

If you follow the trail of all components and their import + export statements to the top, you will find a root.render(...) instruction in the main entry script of the React project. Typically, this main entry script can be found in the index.js file, located in the project's src/ folder. This render() method, which is provided by the React library (to be precise, by the react-dom package), takes a snippet of JSX code and interprets and executes it for you. 

The complete snippet you find in the root entry file (index.js) typically looks like this: 

import React from 'react'; 
import ReactDOM from 'react-dom/client'; 
 
import './index.css'; 
import App from './App'; 
 
const root = ReactDOM.createRoot(document.getElementById('root')); 
root.render(<App />); 

The exact code you find in your new React project might...

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