Mastering React Class Components for Real-World Projects

Learning old React code is a game-changer. It's crazy how different it is from what we're used to now. I worked on this project, Classy Weather, to get a handle on class components - and it was a wild ride. My goal was simple: learn how to work with class components, since I'd only used function components and hooks before. But here's the thing: knowing JavaScript classes is not the same as understanding React class components. It's like they're two different beasts. So, I dove in - and it was tough at first. The code felt strange, like I was reading a different language. But then it clicked: what hooks do today, we used to do manually using lifecycle methods. It's like a lightbulb went off - and suddenly, it all made sense. I learned to map hooks to lifecycle methods, like useEffect with no dependencies being similar to componentDidMount, or useEffect with dependencies being similar to componentDidUpdate. And that cleanup function? It's like componentWillUnmount. The biggest takeaway, though, was understanding how state works in class components. It's not updated functionally by default - you have to think carefully about how and when React re-renders. It's like a puzzle, and once you figure it out, it's incredibly empowering. Now, I can look at old React codebases and actually understand what's going on. I know where side effects live, where state changes happen, and how the component lifecycle flows. It's a valuable skill, especially since frameworks are always changing - but being able to understand existing codebases is what makes you valuable as a developer. And that's the truth. Frameworks come and go, but the ability to read and maintain old code? That's what sets you apart. Check out the full story here: https://lnkd.in/gVN9cKk2 #JavaScript #WebDevelopment

𝐒𝐭𝐨𝐩 𝐦𝐞𝐦𝐨𝐫𝐢𝐳𝐢𝐧𝐠 𝐑𝐞𝐚𝐜𝐭 𝐬𝐲𝐧𝐭𝐚𝐱. 𝐒𝐭𝐚𝐫𝐭 𝐫𝐞𝐚𝐝𝐢𝐧𝐠 𝐜𝐨𝐝𝐞. When I started learning React, I believed progress meant remembering syntax, hooks, and patterns by heart. I tried to memorize how things worked instead of understanding why they worked. That approach didn’t last long. The moment I began building real projects, I realized something important: React is not about how much you remember. It’s about how well you understand structure, flow, and intent I made mistakes early on. I copied code without fully reading it. I fixed bugs without understanding their cause. Sometimes the app worked, but I didn’t know why it worked. That’s when I changed how I learn. Instead of jumping between tutorials, I slowed down. I started reading code line by line. I explored components written by others. I asked myself simple questions: What is this state doing? Why is this effect here? How does this data move through the component? This shift changed everything. Reading code helped me recognize patterns. It taught me how experienced developers think. It showed me that clean logic matters more than clever syntax. React became less confusing once I stopped treating it like something to memorize and started treating it like something to understand. Now, when something breaks, I don’t rush to rewrite it. I read the code. I trace the flow. I let the logic explain itself. There’s still a lot to learn. There will be more mistakes ahead. But now I know how to approach them — calmly, thoughtfully, and with curiosity. 𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 𝐜𝐨𝐝𝐞 𝐢𝐬 𝐚 𝐬𝐤𝐢𝐥𝐥. 𝐀𝐧𝐝 𝐥𝐢𝐤𝐞 𝐚𝐧𝐲 𝐬𝐤𝐢𝐥𝐥, 𝐢𝐭 𝐠𝐞𝐭𝐬 𝐛𝐞𝐭𝐭𝐞𝐫 𝐰𝐢𝐭𝐡 𝐭𝐢𝐦𝐞. #ReactJS #WebDevelopment #FrontendDevelopment #FullStackDevelopment #LearningByDoing #BuildInPublic #DeveloperJourney #JavaScript #SoftwareEngineering #DevelopersOfLinkedIn

Things I misunderstood about React when I was a beginner 👇 When I started learning React, I thought I “got it”… but looking back, I misunderstood a lot. Sharing this in case it helps someone who’s where I was 👇 1️⃣ React is just JavaScript with magic I focused too much on JSX and not enough on core JavaScript. Once I strengthened JS (closures, array methods, async), React suddenly felt easier. 2️⃣ More components = better code I broke everything into tiny components without understanding why. Now I think more about reusability, readability, and the actual responsibility of a component. 3️⃣ State can live anywhere I used useState everywhere and ended up with messy prop drilling. Learning state lifting, derived state, and when NOT to use state was a game-changer. 4️⃣ Re-renders are bad I was scared of re-renders. Later, I learned: re-renders are normal. Unnecessary re-renders are the real problem. 5️⃣ Hooks are just syntax I memorised hooks instead of understanding the rules behind them. Once I understood why hooks exist, bugs were reduced drastically. 6️⃣ If it works, it’s fine My apps worked… but weren’t scalable. Learning folder structure, separation of concerns, and clean patterns made a huge difference. React isn’t hard — misunderstanding fundamentals makes it hard. If you’re learning React right now: 👉 Don’t rush 👉 Master JavaScript 👉 Build real projects 👉 Make mistakes (they teach the most) If you’re experienced, what’s one React misconception you had early on? #ReactJS #FrontendDevelopment #WebDevelopment #LearningInPublic #JavaScript #DeveloperJourney #Programming

Don’t make this mistake while learning React.js (or any other framework/library). I’ve seen many people say “It’s better to dive straight into a framework because it’s easier than wasting time learning the language behind it.” This is where most people get it wrong. Nothing beats having a strong foundation in the core language. Before React.js, you need to understand JavaScript. If your JavaScript is weak, React will always feel confusing. The truth is, frameworks come and go, but the core language stays. Before, Angular was trending. Then Vue became popular. Today, it’s React.js. Tomorrow, it might be something else entirely. If you only chase frameworks, you’ll keep starting over. But with a solid foundation in JavaScript, you can easily adapt to any new framework or library that comes out. Understand the basics first. That’s exactly why I structured my 3-Month Intensive Frontend Development Class 2.0 to help you build a strong frontend foundation. The class will last for 3 months and it’s online via zoom You will learn frontend development tools like html,css,JavaScript and version control with git and GitHub You will also be introduced to reactjs with other bonuses All these with just the registration fee of 40,000 naira instead of 130,000 naira It’s open to everyone no matter the country you are from Only 40 slots are available! Check out my pinned post for more details or dm me I’m Chinonyerem Blessing, a passionate frontend developer #consistency #coder_blessing #iamafrontenddeveloper

I used to think learning React meant mastering class components. this.state this.setState componentDidMount It felt… complicated. And honestly, fragile. Then Hooks arrived — and everything changed. Not because Hooks were faster. But because they were simpler to reason about. With class components: Logic was split across lifecycle methods this binding caused bugs Reusing logic meant HOCs or render props With Hooks: State lives next to the logic that uses it Side effects are explicit Logic is reusable through custom hooks Same rendering engine. Same performance. But far fewer mistakes. That’s the real shift. The insight: Hooks didn’t replace classes because classes were bad. They replaced them because the mental model was too complex. The takeaway: If you’re learning React today — Hooks aren’t just an option. They’re the default way to think. Classes still work. Hooks scale better. 💬 Curious — did Hooks make React easier for you, or harder at first? #ReactJS #ReactHooks #FrontendDevelopment #JavaScript #WebDevelopment #ReactInterview #SoftwareEngineering #CleanCode

🚀 React Basics – Step by Step Learning Are you new to React? Here is a quick guide to get you up to speed.... 📁 File & Folder Structure Understanding how to properly organize React projects using src, components, and reusable files for clean and scalable code. 🧩 Creating Components Learning how to create functional components and how React encourages component-based architecture. 📦 Importing & Exporting How to use export, export default, and import to share components and functions across files. 🧱 JSX Markup Writing HTML-like syntax inside JavaScript and understanding how JSX works behind the scenes. 🧮 JSX with Curly Braces {} Using JavaScript expressions inside JSX to make UI dynamic. 🖱️ Click Events & Function Calls Handling user interactions using onClick and connecting UI events with functions. 📌 These basics are the foundation of building real-world React applications. More learning and practice coming soon 🚀 #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #ReactBasics #LearningJourney #MERN #Coding

So JavaScript is getting a whole lot more interesting. It's evolving, and fast. You can already play with some of these new features in the latest JavaScript engines - they're like the beta testers of the coding world. But here's the thing: these features aren't officially part of the standard yet, so you gotta be careful. Experimental features are like the secret menu at your favorite restaurant - they're not always on the menu, but they can be super useful if you know how to order them. For instance, there's Top-Level Await, which lets you use await in modules without needing async functions - it's like being able to get your food without waiting in line. And then there's Private Class Fields, which helps you encapsulate class properties, like keeping your secret recipe, well, secret. Logical Assignment Operators are another cool one - they simplify coding patterns, making it easier to write clean code. Oh, and let's not forget WeakRefs and FinalizationRegistry, which let you set references to objects that can be garbage-collected - it's like having a cleaning crew for your code. When you're using these experimental features, you gotta stay on top of things - proposed features can change, and that can break your existing code. It's like building a house on shifting sand - you need to be prepared for things to move. So, to use these features safely, you should always check browser compatibility - don't assume everyone's on the same page. Use polyfills and transpilation for unsupported features, like a translator for your code. And test those edge cases with frameworks like Jest or Mocha - it's like having a safety net for your code. Check out this article for more info: https://lnkd.in/gz8tXVm5 #ExperimentalFeatures #CodingBestPractices #ECMAScript #ProductionCode

🚀 React: Default Export, Named Export & React Fragments In React development, organizing your code cleanly and consistently makes your projects easier to scale and maintain. Two key parts of this are how you export components and how you structure returned elements. Today I’ll explain default exports, named exports, and React fragments — with a special mention of my mentor’s guiding wisdom. 💡 📦 Default Export vs Named Export in React ✅ Default Export A default export is used when a file exports one main thing — like a primary component. Importing it is simple and doesn’t require curly braces. Example // Header.jsx function Header() { return <h1>Welcome to My App</h1>; } export default Header; Importing: import Header from "./Header"; You can name the import however you like: import MyTitle from "./Header"; 🎯 Named Export Named exports allow you to export multiple things from the same file. When importing, you must use curly braces and the exact exported names. Example // utils.js export function formatDate(date) { return date.toDateString(); } export const APP_NAME = "ReactApp"; Importing: import { formatDate, APP_NAME } from "./utils"; 📄 What Are React Fragments? In React components, you often want to return multiple elements without adding unnecessary wrapper elements to the DOM. That’s where React Fragments come in! Fragments let you group elements without creating extra <div>s. This keeps your DOM cleaner and your CSS simpler. Short Syntax function Card() { return ( <> <h2>Title</h2> <p>Description</p> </> ); } 🎓 What My Mentor Always Said sanjeev ch Write code with intention export what’s necessary, keep your components lean, and avoid clutter where you don’t need it. That advice has helped me understand when to use default exports, when to use named exports, and why React fragments make markup clearer. #ReactJS #JavaScript #WebDevelopment #DefaultExport #NamedExport #ReactFragments #CodingTips #Frontend #MentorWisdom #Programming #LearnToCode

🚀 React Learning: Reusing Components in a Loop Today I learned one of the most powerful concepts in React JS — reusing components using loops ♻️ Instead of writing the same UI again and again, React allows us to: 👉 Store data in an array of objects 👉 Use map() to loop through the data 👉 Reuse a single component by passing different props 💡 Why this matters? ✔ Cleaner and shorter code ✔ Easy to maintain and scale ✔ Real-world approach used in production apps ✔ Makes UI dynamic and reusable This concept helped me understand how React handles dynamic data and component-based architecture in a much better way. Step by step, building stronger fundamentals 💪 Learning React isn’t about memorizing syntax — it’s about thinking in components 🧠⚛️ #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #LearningJourney #ReactLearning #Props #Components #100DaysOfCode #DeveloperLife