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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 42 — Monitoring & Logging in React

📊 Day 42 — Monitoring & Logging in React

Monitoring and logging are essential for understanding how your React app behaves in production. In this lesson, you’ll learn how to track errors, performance issues, and user interactions using tools like Sentry and browser APIs.

🪶 1. Why Logging Matters

Logging helps you trace bugs that might only appear in production. Monitoring tools provide visibility into app health, crashes, and performance bottlenecks.

⚙️ 2. Integrating Sentry with React

Install and set up Sentry:

npm install @sentry/react @sentry/tracing

Initialize Sentry in index.js:

import * as Sentry from "@sentry/react";
import { BrowserTracing } from "@sentry/tracing";

Sentry.init({
  dsn: "https://examplePublicKey@o0.ingest.sentry.io/0",
  integrations: [new BrowserTracing()],
  tracesSampleRate: 1.0,
});

📈 3. Using Console Logging Effectively

  • Use console.error() for catching runtime errors.
  • Use console.table() for structured data visualization.
  • Don’t leave excessive logs in production builds.

📉 4. Performance Monitoring

React’s Profiler API or Lighthouse can be used to measure render performance and identify slow components.

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