---
title: "Discussion on \"React Fundamentals: Components, JSX, State, and Re-rendering\" | Hashnode"
description: "Discussion on \"React Fundamentals: Components, JSX, State, and Re-rendering\". The question that started it all\nWhy did developers create React when JavaScript already existed?\nJavaScript could already change a web page after it loaded — you could grab an element with document.g"
url: "https://hashnode.com/posts/react-fundamentals-components-jsx-state-and-re-rendering/6a4e7519be40416aab6ecf88"
---

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# [React Fundamentals: Components, JSX, State, and Re-rendering](https://nodej.hashnode.dev/react-fundamentals-components-jsx-state-and-re-rendering?utm_source=hashnode&utm_medium=feed)

The question that started it all Why did developers create React when JavaScript already existed? JavaScript could already change a web page after it loaded — you could grab an element with document.g

Jul 8 · 19 min read · nodej.hashnode.dev  
Updated Sep 29  
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## Written by

[Kanishka Shashi](https://hashnode.com/@Kshashi22)

@Kshashi22 · Greater Noida, Gautam Buddha Nagar, Uttar Pradesh, IND

  
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Kshashi22

Hi, I'm Kanishka Shashi. I'm a Computer Science (AI & ML) student passionate about building, analyzing, and explaining technology. This blog is where I simplify complex concepts into practical, beginner-friendly guides. You'll find articles on Web Development, System Design, AI & LLMs, Data Analytics, SQL, Git/GitHub, and software engineering best practices. I enjoy exploring how modern technologies work under the hood and sharing insights through real-world examples and hands-on projects. Whether you're a student, developer, or tech enthusiast, I hope these articles help you learn something new and build better software. Learning in public. Building consistently. Sharing everything I discover.

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