🧠 React Components Deep Dive: Props, State, Composition & Hooks (2025)

In this tutorial, you'll get a complete understanding of React components including how to build and structure them using best practices. You'll learn about functional components, props, state, JSX, hooks, composition, and how to break an app into reusable modules.

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🔧 Step-by-Step Tutorial

1. 📦 What is a Component in React?

* A component is a reusable and self-contained part of the UI.

* It’s either a function or class (function preferred).

* Allows splitting the UI into isolated pieces.

function MyComponent() { return

Hello World; }

2. 🧩 Types of Components

✅ Functional Components (modern, preferred)

const Welcome = () =>

Welcome!

;

❌ Class Components (legacy)

class Welcome extends React.Component { render() { return

Welcome!

; } }

3. 🛠 Using Props

Props = "properties" → input data passed to a component.They are read-only and passed via JSX attributes.

function Greeting({ name }) { return

Hello, {name}!

; }