When to use useCallback in React for performance optimization

How to prevent unnecessary re-renders in React ⚛️ After understanding why components re-render, the next step is learning how to control unnecessary ones. ⸻ 🔹 React.memo It helps prevent a component from re-rendering when its props haven’t changed. ⸻ 💡 Why it matters: Unnecessary re-renders can affect performance, especially in larger or complex components. ⸻ 🧠 Simple understanding: Same props → no re-render Changed props → re-render ⸻ ⚠️ Important: React.memo is useful, but should be used only when needed. ⸻ Small optimizations can make a big difference ⚡ #ReactJS #FrontendDevelopment #JavaScript #ReactHooks #Performance #LearningInPublic

"Why does your API call run multiple times in React?" 🤯 Chances are… you're not using useEffect correctly. Let’s fix that 👇 🔹 What is useEffect? "useEffect" lets you perform side effects in React: - API calls 🌐 - Event listeners 🎧 - Timers ⏱️ 🔹 Basic Syntax useEffect(() => { // side effect code }, []); 🔹 Dependency Array (IMPORTANT) 👉 "[]" → Runs only once (on mount) 👉 "[value]" → Runs when value changes 👉 No dependency → Runs on every render ❌ 💻 Example: useEffect(() => { fetchData(); }, []); 🔹 Common Mistake Forgetting dependency array → leads to multiple API calls 😵 🚀 Pro Tip: Always think: “When should this effect run?” Then set dependencies accordingly. 💬 What mistake did you make when learning useEffect? 😄 #reactjs #javascript #webdevelopment #mern #developers

Most React tutorials show basic folder structures—but real-world projects need something more scalable. Here’s the approach I follow to keep my projects clean and production-ready: 🔹 I separate logic by features, not just files 🔹 Keep components reusable and independent 🔹 Move all API logic into services (no messy calls inside components) 🔹 Use custom hooks to simplify complex logic 🔹 Maintain global state with Context or Redux only when needed 🔹 Keep utilities and helpers isolated for better reuse 💡 The goal is simple: Write code today that’s easy to scale tomorrow. As projects grow, structure becomes more important than syntax. What’s your approach—feature-based or file-based structure? 👇 #ReactJS #FrontendDevelopment #MERNStack #CleanCode #WebDevelopment #Javascript #NextJS #fblifestyle #IT #Structure #FullStack

Unpopular opinion: you don't need to learn every JavaScript framework. I spent months anxious that I wasn't learning fast enough. React came out with something new. A new framework dropped. Everyone was talking about it. Here's what I wish someone told me earlier: > Pick one thing. Get genuinely good at it. Then expand. > I focused on React and CSS fundamentals for my first year. That decision paid off more than chasing every trend. > The frontend ecosystem moves fast. That's exciting — but it's also a trap if you're not careful. What's the one thing you wish you'd focused on earlier? #JavaScript #React #Frontend #WebDevelopment #LessonsLearned

🚀 Day 12 of Consistent Learning – React Journey Getting more comfortable with real-world React patterns. 🔹 What I covered: - Handling errors in React - useEffect dependency array - Adding and managing effects 🔹 Key takeaway: Understanding the dependency array is crucial to control when effects run. Proper error handling and well-managed effects make applications more stable and predictable. 🔹 Next step: Continue learning new React concepts step by step while strengthening these fundamentals. Improving reliability, one concept at a time. #React #JavaScript #WebDevelopment #Frontend #LearningInPublic

Most React tutorials show basic folder structures—but real-world projects need something more scalable. Here’s the approach I follow to keep my projects clean and production-ready: 🔹 I separate logic by features, not just files 🔹 Keep components reusable and independent 🔹 Move all API logic into services (no messy calls inside components) 🔹 Use custom hooks to simplify complex logic 🔹 Maintain global state with Context or Redux only when needed 🔹 Keep utilities and helpers isolated for better reuse 💡 The goal is simple: Write code today that’s easy to scale tomorrow. As projects grow, structure becomes more important than syntax. What’s your approach—feature-based or file-based structure? 👇 #ReactJS #FrontendDevelopment #MERNStack #CleanCode #WebDevelopment #Javascript

Today I learned about the every() and some() methods in JavaScript — small functions, but really powerful ones. What I found interesting is how they help you quickly check conditions in an array: • every() — checks if all elements meet a condition • some() — checks if at least one element does It feels like I’m starting to think more like a developer and less like just writing code line by line. At the same time, I’ve started working on my own project 💻 Excited to apply what I’m learning in real practice and see everything come together. Step by step 🚀 #JavaScript #Frontend #WebDevelopment #LearningJourney

𝐄𝐯𝐞𝐫𝐲𝐨𝐧𝐞 𝐭𝐚𝐥𝐤𝐬 𝐚𝐛𝐨𝐮𝐭 𝐑𝐞𝐚𝐜𝐭 𝐯𝐬 𝐍𝐞𝐱𝐭.𝐣𝐬… 🤔 𝐁𝐮𝐭 𝐯𝐞𝐫𝐲 𝐟𝐞𝐰 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐮𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝 𝐭𝐡𝐞 𝐫𝐞𝐚𝐥 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞. React is a library that helps you build UI components. It gives you full control, but you have to set up things like routing and optimization yourself. Next.js is built on React and provides these features by default. It handles routing, improves performance, and helps with SEO automatically. Simple way to understand: React = You build everything step by step Next.js = Many things are already set up for you Real-life example: React is like cooking from scratch 🍳 Next.js is like a ready-to-cook kit 🍱 Both are useful — it depends on what you need. If you found this helpful, like 👍 and follow Nest of Coders #NestofCoders #LinkedInGrowth #LearnInPublic #TechCommunity #DevelopersOfLinkedIn #CodeDaily #WebDevelopment #FrontendDevelopment #JavaScript #ReactJS #NextJS #ProgrammingLife #CodingJourney #SoftwareDeveloper #WebDev #TechSkills #BuildInPublic #DevCommunity #100DaysOfCode #CodeNewbien #TechContent

Starting My React.js Journey – Basics with Code! Today, I revisited the fundamentals of React.js, and I believe mastering the basics is the key to building powerful applications. Sharing a quick snippet that demonstrates how simple and clean React can be import React from "react"; function Welcome() { const name = "Developer"; return ( <div> <h1>Hello, {name} </h1> <p>Welcome to React Basics!</p> </div> ); } export default Welcome; What this covers: - Functional Components - JSX (JavaScript + HTML) - Dynamic Data Rendering using variables Key Learning: React is not just a library — it's a mindset of building reusable and maintainable UI components. Next Steps: - Props & State - Event Handling - Component Lifecycle Consistency beats intensity. Small steps every day = Big growth #ReactJS #WebDevelopment #JavaScript #Frontend #CodingJourney #100DaysOfCode

I recently started learning React, and honestly? I didn't expect to be this impressed this early. The thing that caught me off guard the most is JSX — it genuinely looks like HTML and JavaScript had a baby 😄 . You're writing what feels like markup, but it's living inside a JavaScript file and it just... works. For example, something as simple as: const greeting = <h1>Hello, world!</h1>; ...and then calling root.render(greeting) to display it on the page — that clicked something for me. It's such a clean way to think about building UI. JSX lets you use curly braces {} to drop JavaScript expressions right into your markup. One parent element wraps everything. It's structured, but it feels intuitive once you see it. I'm self-taught, working through this step by step — and moments like this remind me why I love the process. The more you learn, the more it starts to make sense. If you're on a similar journey, let's connect. 🚀 #React #JSX #WebDevelopment #FrontendDeveloper #LearningInPublic #SelfTaught