Rohit Kumar’s Post

JavaScript vs. TypeScript: Which Side Are You On? 🚀 Ever felt like your JavaScript code is holding on by a thread? 😅 Let's talk about the game-changer. On one side: JavaScript Flexible, dynamic, and quick to start But those runtime errors? They'll find you at the worst moments "Undefined is not a function" – sound familiar? On the other side: TypeScript Catch errors BEFORE runtime Better autocomplete = faster development Self-documenting code that your future self will thank you for Refactor with confidence, not fear The reality? TypeScript isn't about replacing JavaScript – it's about leveling up when your project grows beyond a certain scale. #JavaScript #TypeScript #WebDevelopment #Coding #SoftwareEngineering #DeveloperLife #SoftwareEngineering #WebDevelopment #ReactJS #NextJS #FrontendDevelopment #JavaScript #FullStackDeveloper #Programming #TechCareers #BuildInPublic

📌 GUESS THE OUTPUT ? Output is 511 if no strict mode use otherwise error come...................... Answer related to Strict Mode in JS. Test your JavaScript fundamentals with output-based interview questions focused on scope, hoisting, closures, and asynchronous behavior. 💬 Share your answer or reasoning in the comments. #JavaScript #InterviewPreparation #SoftwareEngineering #WebDevelopment #DevelopersOfLinkedIn #frontend #backend #coding #learning

How does an EventEmitter actually work? I broke it down by building a functional mini-nodemon CLI from first principles. If you're into Node.js internals, this one is for you. Read more: https://lnkd.in/diw6tqxh #SoftwareEngineering #NodeJS #JavaScript #TypeScript #WebDev #SystemDesign #Coding #BuildInPublic

🔥 JavaScript Devs — Why “==” Still Breaks Code in 2026 Hey devs 👋 Yes… this still happens. 👉 Using == instead of === Looks small… but causes real bugs. Example: 0 == false → true "" == false → true null == undefined → true 💥 Unexpected results everywhere. 💡 What I follow now: ✔ Always use strict equality (===) ✔ Avoid implicit type coercion ✔ Be explicit with comparisons ⚡ Lesson: “JavaScript tries to be helpful… but sometimes it’s too helpful.” 👉 Senior mindset: Predictability > shortcuts Are you still using == anywhere? #javascript #jsbestpractices #programmingtips #webdevelopment #frontenddeveloper #backenddeveloper #cleancode #softwareengineering #codingstandards #js #learn

What is Hoisting in JavaScript ? ✅ One liner = Memory Creation ➡️Hoisting⬅️ Code Execution See Diagram Full Working Test your JavaScript fundamentals with output-based interview questions focused on scope, hoisting, closures, and asynchronous behavior. 💬 Share your answer or reasoning in the comments. #JavaScript #InterviewPreparation #SoftwareEngineering #WebDevelopment #DevelopersOfLinkedIn #frontend #backend #coding #learning

JavaScript is a dynamically typed language,  meaning  variable types are decided at runtime.  TypeScript  is statically typed, meaning types are  checked  during development before execution. difference-javascript-vs-typescript. . . . . . . . . . #JavaScript #JS #WebDevelopment #Coding #Programming #FrontendDevelopment #BackendDevelopment #FullStack #WebDesign #Tech #Developer #CodeNewbie #JavaScriptFrameworks #NodeJS #ReactJS #VueJS #Angular #HTML #CSS #TechCommunity #hackforge

JavaScript code runs inside a special environment called the JavaScript engine (like in a browser or Node.js). When you write code, the engine first reads it and understands its structure through a process called parsing. After that, the code is converted into a form (bytecode) that the computer can execute. During execution, the engine uses two main parts: the memory heap to store variables and data, and the call stack to manage function execution. It runs code line by line in a synchronous way, meaning one task at a time. For handling asynchronous tasks like timers, APIs, or events, JavaScript uses the event loop along with callback queues and Web APIs. This system ensures that tasks are executed smoothly without blocking the main thread, and finally, the result is shown in the browser or console. #JavaScript #NodeJS #WebDevelopment #Programming #Coding #Developer #Frontend #Backend #MERNStack #CodeNewbie

🚀 JavaScript Event Loop: Your Async Superpower! 🌀 Confused how JS juggles multiple tasks on one single thread? 😵 Let's break it down visually! 1. Call Stack 📚: Runs your code line-by-line (sync stuff first!). 2. Web APIs 🌐: Handles async like setTimeout or fetch outside the stack. 3. Queues: • Microtask Queue ⚡ (Promises – VIP priority! Executes ASAP) • Callback Queue ⏳ (setTimeout – waits its turn) 4. Event Loop 🔄: Magic conductor! Checks empty stack → Microtasks → Callbacks. Pro Tip: Master this for smoother React hooks, Node servers, or any async magic! 💥 What’s your biggest Event Loop "aha" moment? Drop it below! 👇 #JavaScript #EventLoop #WebDev #ReactJS #NodeJS #Frontend #AsyncJS #CodingTips #Programming #DevCommunity #SoftwareEngineering #LearnToCode

⚠️ React bug that makes you question reality? 😵💫 You update state… but your logic still uses the OLD value 😶 👉 That’s a stale closure. Your function “remembers” outdated state because of how closures work in JavaScript. 💥 Common symptoms: ❌ Counters not updating ❌ Async calls using old data ❌ UI behaving randomly 🚀 Quick fixes: ✅ Use functional updates (prev => ...) ✅ Fix missing dependencies in useEffect ✅ Use refs for always-fresh values 🔥 Thumb rule: Async + state = double check for stale closures 💬 Ever lost hours on this? Share your story 👇 #ReactJS #React #JavaScript #FrontendDevelopment #WebDevelopment #SoftwareEngineering #FullStack #Programming #CodingLife #Developers #DevCommunity #TechCommunity #CodeNewbie #LearnToCode #100DaysOfCode #Frontend #WebDev #JS #ReactDeveloper #SoftwareDeveloper #CodingTips #Debugging #CleanCode #TechTips #BuildInPublic #DEV #Engineering #ProgrammerLife #TechCareer #CodeDaily

Today I learned about files, promises, and path in Node.js. Getting better with async code step by step 🚀 #NodeJS #JavaScript #Learning #CodingJourney #Backend