React Lifecycle: Class vs Functional Components

📅 Day 5 with React — sometimes revision is the real progress. 🔄 Not every day is about learning something brand new. Today I slowed down. Revisited everything from the past 4 days. And honestly? That's when things REALLY clicked. 👇 🔁 What I revised today: → How the Virtual DOM works and why React is fast → Vite and why it replaced Create React App completely → Babel converting JSX to plain JavaScript behind the scenes → Folder structure and what every file actually does → Components — breaking UI into small reusable pieces → Props — passing data from parent to child → useState — why it's a trigger, not just a variable → Child to Parent communication using callback functions 4 days of concepts. One revision session. Everything feels sharper now. 💡 What revision actually taught me: When I first learned props — I just used them. Today I understood WHY they exist. When I first learned useState — I just called it. Today I understood what React does AFTER you call it. There's a huge difference between using a concept and understanding it. Revision is where that gap closes. 🎯 🧠 The thing nobody tells beginners: Everyone talks about learning fast. Moving fast. Building fast. But the devs who actually get good? They slow down. They go back. They ask WHY — not just HOW. → Why does React re-render on state change? → Why does data only flow downward by default? → Why does Babel exist at all? Asking WHY turns you from a copy-paster into a problem solver. 📌 Day 5: No new topic today. Just pure revision. And I feel more confident about React now than I did after Day 1, 2, 3 and 4 combined. Sometimes the best move is to go back before you go forward. 🔥 Day 6 — back to building. Let's go 🚀 Are you learning React too? Follow along — documenting everything daily 👇 #React #ReactJS #JavaScript #WebDevelopment #Frontend #100DaysOfCode #LearnInPublic #Day5 #SheryiansCodingSchool #CodingJourney #Revision

💻 5 React mistakes I stopped making (and it improved my code a lot) When I started with React, I used to write code that worked… But not code that was clean, scalable, and maintainable. Here are 5 mistakes I fixed: ❌ 1. Writing everything in one component 👉 Now I break UI into small reusable components ❌ 2. Ignoring proper state management 👉 Learned when to use useState vs useEffect vs lifting state ❌ 3. Not handling performance 👉 Started using memoization (useMemo, useCallback) ❌ 4. Poor folder structure 👉 Now I follow a clean project structure ❌ 5. Debugging randomly 👉 Now I debug step-by-step with proper logs Small changes… but huge difference in code quality 🚀 Still learning every day 👨💻 Which mistake did you make the most? 😅 #ReactJS #FrontendDevelopment #JavaScript #CleanCode #WebDevelopment #SoftwareEngineer

Node.js isn’t just a runtime. It’s a quiet shift in how you think about building things. Most of us start coding like we’re stacking bricks — one after another, waiting for each to settle before placing the next. That’s how traditional systems often feel: predictable, but slow… like asking permission at every step. Node.js challenges that mindset. It whispers: “Why wait?” Instead of blocking, it flows. Instead of pausing, it listens. It teaches you to design systems that are less about control and more about coordination. Events happen, responses follow, and everything keeps moving — like a conversation rather than a command. And somewhere in that shift, you realize something deeper: Good systems aren’t the ones that do everything first. They’re the ones that respond at the right time. That’s the philosophy Node.js brings to the table — not speed alone, but responsiveness, scalability, and efficiency in motion. In a world where users expect instant feedback, where millions of requests knock at once, Node.js doesn’t panic. It adapts. Maybe that’s the real lesson here — not just for code, but for how we build anything: 👉 Don’t block progress waiting for perfection. 👉 Stay non-blocking, stay adaptive. 👉 Let things flow, and respond when it matters most. Because sometimes, the smartest system… is the one that knows when not to wait. #NodeJS #JavaScript #BackendDevelopment #ScalableSystems #ProgrammingMindset

When we first created our Core React course, class components were the standard. Over the years, we’ve kept it up to date—adding hooks, modern patterns, and best practices. But this spring, we decided it was time for a 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗿𝗲𝘄𝗿𝗶𝘁𝗲. Why? Because React has evolved, and so has our approach to teaching it. Our updated 𝗖𝗼𝗿𝗲 𝗥𝗲𝗮𝗰𝘁 𝗖𝗼𝘂𝗿𝘀𝗲 is now 𝗳𝗿𝗲𝘀𝗵, 𝗺𝗼𝗱𝗲𝗿𝗻, 𝗮𝗻𝗱 𝗱𝗲𝗲𝗽𝗹𝘆 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹, focusing on the essentials you need to master React today. We don’t just teach how—we dive into the why, because we believe true mastery comes from understanding the layer beneath the abstraction. 𝗪𝗵𝗮𝘁’𝘀 𝗻𝗲𝘄? - A 𝗴𝗿𝗼𝘂𝗻𝗱-𝘂𝗽 𝗿𝗲𝘄𝗿𝗶𝘁𝗲 for React 19 and beyond - 𝗠𝗼𝗿𝗲 "𝘂𝗻𝗱𝗲𝗿 𝘁𝗵𝗲 𝗵𝗼𝗼𝗱" content, including in-depth coverage of React’s 𝗙𝗶𝗯𝗲𝗿 𝗮𝗻𝗱 𝗙𝗮𝗯𝗿𝗶𝗰 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 - 𝗡𝗲𝘄 𝗱𝗶𝗮𝗴𝗿𝗮𝗺𝘀 𝗮𝗻𝗱 𝗲𝘅𝗽𝗹𝗮𝗻𝗮𝘁𝗶𝗼𝗻𝘀 to clarify complex concepts - A 𝗽𝗲𝗱𝗮𝗴𝗼𝗴𝗶𝗰𝗮𝗹 𝗳𝗼𝗰𝘂𝘀 on fundamentals, not just examples This isn’t just an update—it’s a 𝗿𝗲𝗶𝗺𝗮𝗴𝗶𝗻𝗲𝗱 𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 for developers who want to build a solid foundation in React. 🔗 𝗖𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝘁𝗵𝗲 𝗳𝘂𝗹𝗹 𝗼𝘂𝘁𝗹𝗶𝗻𝗲: https://lnkd.in/eaut_UFb 𝗪𝗵𝗮𝘁 𝗱𝗼 𝘆𝗼𝘂 𝘁𝗵𝗶𝗻𝗸 𝗶𝘀 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗰𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗶𝗻𝗴 𝗽𝗮𝗿𝘁 𝗼𝗳 𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗥𝗲𝗮𝗰𝘁 𝘁𝗼𝗱𝗮𝘆? Let’s discuss in the comments!. #React #ReactJS #WebDevelopment #Frontend #JavaScript #TechEducation

When we first created our Core React course, class components were the standard. Over the years, we’ve kept it up to date—adding hooks, modern patterns, and best practices. But this spring, we decided it was time for a 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗿𝗲𝘄𝗿𝗶𝘁𝗲. Why? Because React has evolved, and so has our approach to teaching it. Our updated 𝗖𝗼𝗿𝗲 𝗥𝗲𝗮𝗰𝘁 𝗖𝗼𝘂𝗿𝘀𝗲 is now 𝗳𝗿𝗲𝘀𝗵, 𝗺𝗼𝗱𝗲𝗿𝗻, 𝗮𝗻𝗱 𝗱𝗲𝗲𝗽𝗹𝘆 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹, focusing on the essentials you need to master React today. We don’t just teach how—we dive into the why, because we believe true mastery comes from understanding the layer beneath the abstraction. 𝗪𝗵𝗮𝘁’𝘀 𝗻𝗲𝘄? - A 𝗴𝗿𝗼𝘂𝗻𝗱-𝘂𝗽 𝗿𝗲𝘄𝗿𝗶𝘁𝗲 for React 19 and beyond - 𝗠𝗼𝗿𝗲 "𝘂𝗻𝗱𝗲𝗿 𝘁𝗵𝗲 𝗵𝗼𝗼𝗱" content, including in-depth coverage of React’s 𝗙𝗶𝗯𝗲𝗿 𝗮𝗻𝗱 𝗙𝗮𝗯𝗿𝗶𝗰 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 - 𝗡𝗲𝘄 𝗱𝗶𝗮𝗴𝗿𝗮𝗺𝘀 𝗮𝗻𝗱 𝗲𝘅𝗽𝗹𝗮𝗻𝗮𝘁𝗶𝗼𝗻𝘀 to clarify complex concepts - A 𝗽𝗲𝗱𝗮𝗴𝗼𝗴𝗶𝗰𝗮𝗹 𝗳𝗼𝗰𝘂𝘀 on fundamentals, not just examples This isn’t just an update—it’s a 𝗿𝗲𝗶𝗺𝗮𝗴𝗶𝗻𝗲𝗱 𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 for developers who want to build a solid foundation in React. 🔗 𝗖𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝘁𝗵𝗲 𝗳𝘂𝗹𝗹 𝗼𝘂𝘁𝗹𝗶𝗻𝗲: https://lnkd.in/eaut_UFb 𝗪𝗵𝗮𝘁 𝗱𝗼 𝘆𝗼𝘂 𝘁𝗵𝗶𝗻𝗸 𝗶𝘀 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗰𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗶𝗻𝗴 𝗽𝗮𝗿𝘁 𝗼𝗳 𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗥𝗲𝗮𝗰𝘁 𝘁𝗼𝗱𝗮𝘆? Let’s discuss in the comments!. #React #ReactJS #WebDevelopment #Frontend #JavaScript #TechEducation

Most beginners think React is complicated… But honestly, it becomes simple when you understand a few core hooks. Today I revised the fundamentals, and here’s a clean breakdown - 1. useState - Used to manage state inside a component. Whenever state changes, React re-renders the UI. 2. useEffect - Handles side effects like API calls, DOM updates, or event listeners. Runs after render and can be controlled using dependencies. 3. useContext - Helps share data globally without passing props manually at every level. Very useful to avoid prop drilling. 4. useReducer - Best for managing complex state logic. Works like a simpler version of Redux with actions and reducers. 5. useRef - Stores values that don’t trigger re-render. Also used to directly access DOM elements. 6. useMemo & useCallback - Used for performance optimization. They help avoid unnecessary re-renders and expensive calculations. The goal is not to memorize everything… The goal is to understand when and why to use each hook. Still learning. Still improving. 🚀 #React #WebDevelopment #JavaScript #Frontend #LearningInPublic

Mastering React State with Hooks Ever felt like your React components are getting cluttered with too much state logic? Here’s a simple idea that can seriously clean things up: Custom Hooks What’s the big deal? Custom hooks let you extract and reuse stateful logic across components. Instead of repeating the same `useState` and `useEffect` logic everywhere, you write it once—and reuse it. Can they really halve your code? In many cases… YES. Imagine this: Instead of writing the same logic in 5 components, you move it into a custom hook like `useFetchData()` or `useFormHandler()`. Now you: Reduce duplication Make components cleaner Improve readability Make debugging easier Simple Example Before: Each component handles its own API call logic After: One custom hook handles everything Components just use it Why you should start using them Keeps your code DRY (Don’t Repeat Yourself) Makes scaling your app easier Encourages better structure Pro Tip Start small. Pick one repeated logic (like form handling or API calls) and convert it into a custom hook. #React #WebDevelopment #Frontend #JavaScript #Coding #SoftwareDevelopment

There was a time when React completely confused me. Not because it was impossible… but because I didn’t truly understand what was happening behind the scenes. Props felt like magic. State felt unpredictable. And sometimes my components worked… without me knowing why. 😅 I used to jump straight into building big features, thinking I’d “figure it out along the way.” But the real shift happened when I slowed down and focused on the fundamentals. I started asking better questions: • How is data actually flowing here? • Why is this component re-rendering? • Can I break this into smaller, reusable pieces? That’s when things began to click. React stopped feeling random — and started feeling structured, predictable, and powerful. 🚀 Today, I still learn every day. But the difference is clarity. Now I build components with intention, not confusion. If you’re in that phase where nothing makes sense — keep going. That’s not failure… that’s the foundation being built. 💯 👉 What was the hardest concept for you when learning React? #reactjs #frontenddeveloper #webdevelopment #javascript #programming

💭 Why do developers love React so much? I used to ask the same question. After working with it, here’s my honest answer 👇 React gives you structure and control. Instead of scattered code, you start building with purpose: ✔ Each component has a responsibility ✔ Logic becomes reusable ✔ UI becomes predictable And the biggest mindset shift? 👉 “Everything is a component.” From a simple button to an entire page — everything can be broken down and reused. That’s powerful. But React isn’t perfect. ❌ Too many patterns to choose from ❌ Easy to overcomplicate things ❌ Beginners often get lost So I follow one rule now: 👉 Keep it simple. – Small components – Clear naming – Readable code Because at the end of the day: Clean code > clever code If you're working with React, what’s the most challenging part for you right now? #React #JavaScriptDeveloper #FrontendEngineer #CleanCode #Programming #DevCommunity #SoftwareDevelopment

When I first picked up React, I thought: 👉 “It’s just a library for building UI… shouldn’t be that complicated.” Then came the reality check... Suddenly I wasn’t just learning React — I was dealing with routing, state management, styling frameworks, testing tools, build tools… and it felt like the list would never end. React itself is pretty simple to understand. But the ecosystem around it? That’s where things start to feel overwhelming. ✨ What I’ve learned from this: You don’t need to learn everything together. Start with the basics → get comfortable building small projects → and only bring in new tools when you actually need them. That shift in approach makes learning way more manageable (and enjoyable). 💬 For those who’ve been through this - What was the first tool you explored after getting comfortable with React? #ReactJS #JavaScript #WebDevelopment #Frontend #Programming #CodingLife #Developers #ReactEcosystem #NextJS #TypeScript #TailwindCSS #SoftwareEngineering