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🎉 Day 46 — React Mastery Completed (Final Summary & Congratulations!)

🎉 Day 46 — React Mastery Completed (Final Summary & Congratulations!) Congratulations, developer! 👏 You’ve successfully completed the 45-Day React.js Roadmap — from understanding the fundamentals to mastering advanced concepts like Redux, Routing, Testing, and Deployment. 📘 What You’ve Learned ✅ React basics — Components, JSX, Props, and State ✅ Hooks — useState, useEffect, useRef, useMemo, and Custom Hooks ✅ Context API and Redux Toolkit for global state management ✅ Routing with React Router & Protected Routes ✅ Data fetching using Fetch API, Axios, React Query ✅ Advanced Patterns — Compound Components, Render Props, HOCs ✅ Styling — CSS Modules, Styled Components, Theming ✅ Animations, Accessibility, Testing, and Performance Optimization ✅ Deployment on Vercel, Netlify, or GitHub Pages 🧩 Final Project Ideas Now that you’re done, build real-world apps to polish your skills: 📝 Task ...
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📦 Day 55: JavaScript Modules in Browser & Node.js

📦 Day 55: JavaScript Modules in Browser & Node.js

Modules help organize code into reusable files. There are two main systems — ES Modules (ESM) and CommonJS.

🔹 ES Modules (Browser)

// math.js
export function add(a,b){ return a+b; }

// main.js
import { add } from './math.js';
console.log(add(5,3)); // 8

🔸 CommonJS (Node.js)

// math.js
module.exports = { add: (a,b)=>a+b };

// app.js
const { add } = require('./math');
console.log(add(4,2));

🧪 Try it Yourself (Browser Modules)

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