Controlled vs Uncontrolled Components in React

High-Resolution Performance Monitoring 📊 Microsecond precision (vs Date.now which is millisecond) 🎯 Same API as browser performance ⚡ Measure accurately without external libs Use case: Benchmark critical code paths, measure API response times, or detect performance regressions during development. #NodeJS #JavaScript #Performance #CodingTips #WebDev

One thing I’ve consistently found frustrating in the early phase of development is setup. On the frontend side, we have powerful CLI tools that generate clean boilerplate in seconds. It’s fast, standardized, and developer-friendly. But on the backend—especially when working with #ExpressJS—the experience often feels outdated and repetitive. Setting up structure, routing, and basic configurations can take more time than it should. To simplify this, I’ve been working on a small tool: https://lnkd.in/d2rUUnYy It’s designed to make Express project setup quicker and more intuitive, so you can focus more on building rather than configuring. If you’re working with Express, I’d really appreciate your feedback. #WebDevelopment #BackendDevelopment #NodeJS #JavaScript #DeveloperTools #CLI #OpenSource #SoftwareDevelopment

⚡ Part 6 of 10: React performance conversations often start too early. Someone sees a rerender and immediately reaches for memoization. But sometimes the real issue is simpler than that. Bad state shape. Too much work inside render. Unclear data flow. A component tree that grew without much intention. I’m not against optimization. I just think the better starting point is: What actually feels slow? Where’s the bottleneck? What problem are we solving? A lot of React code gets more complicated in the name of performance without actually getting better. Have you ever seen “performance optimization” make a codebase worse? #React #ReactPerformance #FrontendPerformance #JavaScript #TypeScript #SoftwareEngineering #WebPerformance

you've been using useEffect + useState to fetch data. React 20 stable use() hook makes that pattern obsolete. one hook. Suspense integration. no loading state. no race conditions. why it's better: use() reads promises and works with Suspense boundaries. the component suspends while loading. no manual state management. no effect cleanup. the promise resolves, React resumes. that's it. it also works conditionally unlike useContext which must follow hook rules. the code: one line replaces a whole pattern. #reactjs #typescript #webdevelopment #buildinpublic #react #src

Understanding the React Component Lifecycle is key to building efficient and scalable applications. From mounting to updating and unmounting, each phase plays a critical role in how components behave, manage data, and interact with the DOM. This visual breakdown highlights core lifecycle methods, real-world use cases, and best practices to help developers write cleaner, more predictable code. If you're working with React, mastering the lifecycle isn’t optional it’s foundational. #ReactJS #FrontendDevelopment #WebDevelopment #JavaScript #SoftwareEngineering

Can you cancel a Promise in JavaScript? Short answer: No — but you can cancel the work behind it. A Promise is just a result container, not the async operation itself. Once created, it will resolve or reject — you can’t “stop” it directly. What you can do instead: • Use AbortController → cancels APIs like fetch • Use cancellation flags/tokens → for custom async logic • Clear timers → if work is scheduled (setTimeout) • Ignore results → soft cancel pattern Real-world takeaway: Design your async code to be cancel-aware, not Promise-dependent. This is exactly how modern tools like React Query handle requests under the hood. #JavaScript #Frontend #AsyncProgramming #WebDevelopment #ReactJS #CleanCode

Most developers don’t misunderstand JavaScript. They misunderstand time. . Take setTimeout vs setImmediate. On the surface, they look interchangeable. “Just run this later,” right? That’s the lie. Here’s the reality: setTimeout(fn, 0) → runs after the current call stack + timers phase setImmediate(fn) → runs in the check phase, right after I/O So under load or inside I/O cycles… they don’t behave the same at all. Example: You’re handling a heavy I/O operation (like reading a file or API response). setTimeout → might delay execution unpredictably setImmediate → executes right after the I/O completes One is scheduled. The other is strategically placed in the event loop. That difference? It’s the kind that causes race conditions no one can reproduce. Most people write async code. Very few understand when it actually runs. And that’s where bugs live. #JavaScript #NodeJS #Async #SoftwareEngineering #Backend

Handle Async Code Like a Pro! ⚡ Tired of messy .then() chains? Async/Await is the modern way to write asynchronous code that looks and behaves like regular, synchronous code. It makes your backend and frontend logic significantly cleaner and easier to read. Here is a quick breakdown of how to master Async/Await. 🚀 #javascript #asyncawait #webdevelopment #backend

⚛️ React Concept: useState Explained with Real Examples The "useState" hook allows you to add state management to functional components. It helps you store and update data that changes over time — like user input, counters, or UI state. Basic syntax: const [state, setState] = useState(initialValue); 🔹 "state" → current value 🔹 "setState" → function to update the value 📌 Common use cases: • Counter functionality • Form inputs • Toggle UI (show/hide) 📌 Best Practice: Always update state using the setter function and avoid directly mutating state. #reactjs #frontenddevelopment #javascript #webdevelopment #softwareengineering

🚀 Day 964 of #1000DaysOfCode ✨ useState & useEffect — What They Are & When to Use Them These are the most used hooks in React… yet many developers don’t fully understand when to use each one. In today’s post, I’ve explained `useState` and `useEffect` in a simple and practical way — not just what they are, but when you should actually use them in real-world scenarios. `useState` helps you manage and update state inside your components, while `useEffect` is used to handle side effects like API calls, subscriptions, and syncing data. The confusion usually comes when developers mix their responsibilities — leading to unnecessary re-renders or messy logic. Understanding the clear separation between state and side effects can make your React code much cleaner and easier to reason about. If you’re working with React daily, mastering these two hooks is absolutely essential. 👇 What confuses you more — managing state or handling side effects? #Day964 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #React #CodingCommunity #ReactJS