EDC4IT Europe BV’s Post

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

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

🚀 Day 8 of Consistent Learning – React Journey (Late Update) Missed posting last night, but staying accountable and sharing today. 🔹 What I covered: - PropTypes for type checking in React - Started a mini project: Text Expander 🔹 Key takeaway: Using PropTypes adds a layer of reliability to components by catching bugs early. Starting small projects like Text Expander helps in applying concepts immediately and reinforces learning. 🔹 Next step: Continue learning new React concepts step by step while strengthening these fundamentals. Consistency continues, even if the timing isn’t perfect. #React #JavaScript #WebDevelopment #Frontend #LearningInPublic

🚀 Day 11 of Consistent Learning – React Journey Continuing to explore deeper and more practical concepts. 🔹 What I covered: - How events work in React - Libraries vs frameworks - useEffect hook - Using async functions for data fetching from APIs 🔹 Key takeaway: Handling side effects with useEffect and fetching data asynchronously are essential for building real-world applications. Also, understanding the difference between libraries and frameworks gives better clarity on how React fits into the ecosystem. 🔹 Next step: Continue learning new React concepts step by step while strengthening these fundamentals. Moving closer to real-world applications. #React #JavaScript #WebDevelopment #Frontend #LearningInPublic

⚠️ React Hooks Look Simple… Until You Try Them. As I’ve been learning useState, I started noticing something…” At first, it looked easy. Just a variable… and a function to update it. Simple, right? That’s what I thought. Until I actually tried using it. Coming from JavaScript, I’m used to changing values directly. But in React? You don’t just change values. You update state… and React re-renders everything for you. That shift? Confusing at first. I found myself asking: “Why can’t I just update it directly?” 🤔 But as I kept practicing, something started to click. React isn’t just about writing code. It’s about thinking differently. Instead of controlling everything manually, you describe what should happen… And React handles the rest. That’s powerful. Still learning. Still making mistakes. But now it’s starting to make sense. 💬 If you’ve learned React hooks — what confused you the most at the beginning? #ReactJS #FrontendDevelopment #JavaScriptDeveloper #WebDevelopmentJourney #LearnToCode

I made React slower trying to optimize it. Wrapped everything in useMemo. Added useCallback everywhere. Felt productive. Performance got worse. Here's what I didn't understand about re-renders 👇 4 things that trigger a re-render: > State change > Prop change > Parent re-renders (even if YOUR props didn't change) > Context update That third one is responsible of unnecessary re-renders I've seen in real codebases. The fix isn't memorizing APIs. It's this order: 1. Profile first Open React DevTools Profiler. Find the actual problem. Takes 2 minutes. 2. Wrap the right components in React.memo Not all of them. Only components that are expensive AND receive stable props. 3. Stabilise your functions with useCallback Without it - new function reference every render --> child always re-renders. Doesn't matter if you have React.memo. 4. useMemo for heavy calculations only Not for "this array map looks expensive." Only when Profiler proves it. The rule I follow now: Don't optimise what you haven't measured. One change in the right place beats 10 changes in the wrong ones. What's the most unnecessary useMemo you've ever written? 😄 #React #JavaScript #Frontend #WebDev

🚀 Day 4 of Consistent Learning – React Journey Focusing on revision through building, not just watching. 🔹 What I covered: - Revised previous React concepts by building the Eat-n-Split project - Applied state management, props, and component structure in a real scenario 🔹 Key takeaway: Building projects exposes gaps in understanding. Revision through real implementation is far more effective than just revisiting theory. 🔹 Next step: Continue learning new React concepts step by step while strengthening these fundamentals. Learning by building, one step at a time. #React #JavaScript #WebDevelopment #Frontend #LearningInPublic

🚀 Mastering React Hooks – A Game Changer for Modern Development React Hooks completely changed the way we build components. No more complex class components — everything is cleaner, more readable, and reusable. Here are some of the most powerful hooks I use daily: 🔹 useState – Manage state easily 🔹 useEffect – Handle side effects like API calls 🔹 useContext – Share data across components 🔹 useReducer – Better state management for complex logic 🔹 useRef – Access DOM elements directly 🔹 useMemo & useCallback – Optimize performance 💡 Hooks not only simplify your code but also improve scalability and maintainability. If you're working with React and still not fully using Hooks, you're missing out on a huge productivity boost! 👉 What’s your favorite React Hook and why? #ReactJS #WebDevelopment #Frontend #JavaScript #ReactHooks #SoftwareDevelopment #Coding

React isn’t just a library—it’s a mindset. From breaking down complex UIs into reusable components to managing state with precision, React teaches you how to think in systems, not just screens. What looks like simple code on the surface is actually layers of logic, structure, and scalability working together behind the scenes. Just like any powerful tool, the real value of React isn’t in writing code—it’s in how you architect experiences. Build components. Think in flows. Design for scale. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering

🚀 Understanding Hooks in React (Simple Explanation) When I first started learning React, I thought state management was only possible with class components… but then I discovered Hooks — and everything changed. 👉 Hooks are special functions in React that allow functional components to use features like state and lifecycle methods. 💡 Example: With useState, we can easily manage state inside a function component — no need for classes anymore. Why Hooks are powerful: ✔ Cleaner and more readable code ✔ Reusable logic across components ✔ Less boilerplate compared to class components ✔ Makes development faster and more scalable Some commonly used Hooks: 🔹 useState – manage state 🔹 useEffect – handle side effects (API calls, timers) 🔹 useRef – access DOM elements 🔥 One simple line: Hooks = extra powers for functional components. Learning Hooks really changed how I write React code — and made development feel much more intuitive. #ReactJS #WebDevelopment #Frontend #JavaScript #LearningInPublic #Developers