Understanding Formik in React & React Native: Simplifying Forms

Small reminder while working with React today ⚛️ Optimization isn’t about making things fancy. It’s about making things efficient. Understanding when to use useMemo, useCallback, or avoid unnecessary re-renders can make a real difference as apps grow. Performance is not an afterthought. It’s part of writing responsible code. Still learning. Still improving. 🚀 #ReactJS #FrontendDeveloper #JavaScript #WebPerformance #LearningJourney #EntryLevel

Why most React developers misunderstand useEffect It's not a lifecycle method. It's not componentDidMount in disguise. And it's definitely not the place for derived state. useEffect is synchronization with an external system. 🔍 The mental model: useEffect = "After React commits to the screen, do this side effect" The dependency array = "Only re-run when THESE values differ" Cleanup function = "Before re-running OR unmounting, clean up" Common pitfall I see: JavaScript // ❌ Wrong: Using useEffect for computed values useEffect(() => { setFullName(`${firstName} ${lastName}`); }, [firstName, lastName]); // ✅ Right: Derived state should be... just stateless computation const fullName = `${firstName} ${lastName}`; useEffect is for: API calls Subscriptions Manual DOM manipulation Analytics/logging Not for: Things you can calculate during render. What's your useEffect horror story? Drop it below 👇 #ReactJS #JavaScript #FrontendEngineering #WebDev #CleanCode

💡 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬: 𝐃𝐨𝐧’𝐭 𝐒𝐤𝐢𝐩 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐟𝐨𝐫 𝐑𝐞𝐚𝐜𝐭 Many beginners jump straight into React… But here’s the truth: React doesn’t replace JavaScript React is powered by JavaScript. 🧱 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐭𝐞𝐚𝐜𝐡𝐞𝐬 𝐲𝐨𝐮 𝐭𝐡𝐞 𝐟𝐮𝐧𝐝𝐚𝐦𝐞𝐧𝐭𝐚𝐥𝐬: How the web works DOM manipulation Events & logic Core programming concepts ⚡ React helps you build at scale: Reusable components Clean UI structure Better state management Faster modern app development React is like using a powerful toolkit… But without JavaScript, you won’t understand what’s happening under the hood. 📌 Learn JavaScript deeply first 📌 Then React becomes 10x easier Because great frontend developers don’t just use frameworks… They understand the foundation. 👀 What did you learn first JavaScript or React? #React #Javascript #webapp #frontenddeveloper #projects #rehman_coding #copycontent #Reactjs #js

Most React Developers Misuse useEffect ⚛️ (Here’s Why) useEffect is one of the most confusing hooks in React. Not because it’s complicated. But because we misunderstand its purpose. Many developers think: ❌ “useEffect runs after every render” ❌ “I’ll just put logic inside useEffect” ❌ “It’s fine, I’ll fix the dependency array later” That’s where problems begin. What useEffect is actually for: 👉 Synchronizing your component with something outside React. Examples: • API calls • Subscriptions • Event listeners • Timers • Updating the document title If your logic does NOT interact with the outside world… You probably don’t need useEffect. Common Mistakes: • Missing dependency array • Ignoring ESLint warnings • Using it to derive state • Causing infinite re-renders These lead to: • Performance issues • Hard-to-debug bugs • Unexpected behavior The mindset shift: Before writing useEffect, ask: “Am I syncing with something external?” If not — rethink your approach. React becomes much simpler when you follow its mental model. Strong fundamentals > memorizing hooks 🚀 #React #FrontendDevelopment #JavaScript #WebDevelopment #LearningInPublic

Async JavaScript can feel tricky at first. I remember struggling with callbacks, then slowly getting comfortable with promises, and finally loving async/await. That transition really changed how I write clean, readable code. If you’re learning async JS: -- Start with callbacks -- Understand promises properly -- Then move to async/await These concepts are essential for: -- API calls (fetch / axios) -- User interactions (event listeners) -- Timers (setTimeout / setInterval) -- Real-world app development Sharing a simple PDF to help beginners understand async JavaScript step by step. Hope it helps someone who’s currently stuck 🙌 What part of async JavaScript did you find the hardest to understand? Powered by Mohit Decodes #JavaScript #AsyncJS #AsyncAwait #Promises #WebDevelopment #Frontend #Learning

After working with JavaScript for years, I’ve learned that mastering the basics makes everything easier. Closures. Promises. Event Loop. Strict comparisons. These concepts decide whether your app feels smooth or slow. Frameworks will change. Trends will change. But strong JavaScript fundamentals? They stay forever. 💯 If you’re serious about growing as a developer, invest time in understanding how JS really works. Which concept challenged you the most? 👇 #JavaScript #WebDevelopment #SoftwareEngineering #ReactJS #LearningInPublic #CareerGrowth

🚀 Project: URL Short Code Generator I was curious about how URL shortening services work, so I built a project to understand the core logic behind them. 🔹 This project focuses on the first step of a URL shortener: generating a short code that represents an entire long URL. 🔹 Users can: Enter a long URL Get a randomly generated short code 🔹 The project currently does not handle redirection — it intentionally focuses on short code generation, which is the foundation of any URL trimming service. 🛠 Tech Stack React Express.js Sowmya Nagarajan Uptor #WebDevelopment #FullStackDevelopment #JavaScript #ReactJS #ExpressJS #NodeJS #BackendDevelopment #FrontendDevelopment

🚀 Mastering the DOM in JavaScript! Here’s a quick cheat sheet I use to recall essential DOM methods and events while building dynamic web apps using React (and the entire MERN stack) 💻 Understanding the DOM is the backbone of frontend development whether it’s handling user interactions, updating UI efficiently, or manipulating elements directly when needed. 📘 Key DOM Concepts Covered: Selecting elements dynamically Creating & modifying nodes Handling events (Mouse, Keyboard, Form) 💡 DOM mastery = Smoother React logic + Better debugging + Cleaner component rendering #JavaScript #MERNStack #FrontendDevelopment #WebDevelopment #ReactJS #DeveloperLearning #CodingCheatSheet #TechCareer

DAY 18 OF POSTING REACT CONTENT ⚛️ WHAT IS A PROMISE IN JAVASCRIPT? 🤔 Sometimes, JavaScript needs time to finish a task. For example: loading data from a server waiting for a response A Promise represents a value that will be available later. It can be: 👉 pending (still working) 👉 resolved (finished successfully) 👉 rejected (something went wrong) Promises help JavaScript handle tasks without blocking the app. That’s why they are important in React. #ReactJS #JavaScript #Promises #AsyncJavaScript #FrontendDevelopment #WebDevelopment #LearnInPublic #CodingJourney

Next.js 16 Beginner Guide is Here! 🚀 As promised, I’ve shared a complete beginner-friendly guide for Next.js 16 😊 I’ve released a 100-page PDF that helps React developers learn Next.js 16 with App Router, step by step — in a simple and practical way so you can build real-world apps with confidence. ✨ This guide is perfect for: -- React developers moving to Next.js -- Frontend devs aiming for full-stack -- Developers building production-ready projects -- Interview preparation & concept revision 📘 If you want to learn Next.js clearly, simply, and from basics — this guide is for you. 💙 💡 𝐉𝐨𝐢𝐧 𝐎𝐮𝐫 WhatApp 𝐂𝐡𝐚𝐧𝐧𝐞𝐥 Get daily updates on quizzes and tech insights! 👉 https://lnkd.in/drYyph8x 📺 Follow Mohit Decodes(https://lnkd.in/dEqvkECV) for: -- React & Next.js tutorials -- Full-stack project guides -- Interview prep content -- Daily dev tips 📤 Share with your network 💬 Comment “NEXTJS” if you want the PDF 🔖 Save for later 👍 Like if this helped #NextJS #NextJS16 #ReactJS #WebDevelopment #FrontendDeveloper #FullStackDeveloper #JavaScript #ReactDeveloper #MohitDecodes #LearnInPublic