Ankush Gupta’s Post

🚨 Error Handling in Node.js is underrated but critical While building backend APIs, I realized something important:Writing features is easy.Handling failures gracefully is what makes an app production-ready. Unhandled errors can crash servers and frustrate users. So now I focus on: ✅ try/catch with async–await ✅ centralized error middleware ✅ custom error classes ✅ proper logging ✅ handling unhandled promise rejections These small practices made my applications more stable, debuggable, and reliable. 🚀 #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #SoftwareEngineering #LearningInPublic

🎯 Controlled vs Uncontrolled Components in React Forms look simple — until they grow. ✅ Controlled Components • State handled by React • Easy validation & debugging • Predictable data flow ⚡ Uncontrolled Components • Managed by the DOM • Less code, quick setup • Limited control For real-world, production apps: 👉 Controlled components win for reliability and scalability. 💬 Which one do you use most in your projects? #ReactJS #Forms #FrontendDevelopment #JavaScript #WebDevelopment

🚀 Day 2/15 – React Patterns Controlled vs Uncontrolled Components In React, form handling comes down to one key concept: Who controls the data? 🔹 Controlled Component React state is the source of truth. Uses useState + onChange. Best for validation, dynamic UI, and predictable behavior. 🔹 Uncontrolled Component DOM is the source of truth. Uses useRef. Good for simple forms or third-party integrations. 💡 In real-world apps, controlled components are preferred for scalability and maintainability. Understanding data flow = writing better React. #React #Frontend #JavaScript #Day2

"Developed a web application with React." That was my project description. Generic. Forgettable.Then I learned: Generic descriptions tell. Specific metrics prove. I transformed every project description with quantifiable metrics: - Types that actually work: - Performance: "Reduced page load time from 3.2s to 0.8s" - Scale: "Deployed application serving 10,000+ daily users" - Efficiency: "Built CI/CD pipeline reducing deployment from 2 hours to 10 minutes" - Complexity: "Processing 1 million events per second" The Formula: [Action Verb] + [What You Built] + [Technologies] + [Result] My before/after: ❌ "Built a chat application" ✅ "Engineered real-time chat platform using WebSocket protocol, supporting 5,000+ concurrent users with <100ms message latency. Implemented Redis for session management and MongoDB for message persistence." Even if your app only has 10 users, you can measure: load time, API response time, lines of code, test coverage, deployment time. Numbers make it real. My template has a metrics framework built in. Download it in the comments. 👇

🚀 One of React’s Most Powerful (and Least Understood) Hooks: useSyncExternalStore Most developers are comfortable with useState, useEffect, and useContext. But when your app needs to sync with data outside React, that’s where things get serious — and where useSyncExternalStore comes in. This hook exists for a reason: 👉 React needs a safe way to read external data without breaking concurrent rendering. 🧠 What is an External Store? An external store is state that React does not own, such as: • Redux / Zustand store • WebSocket data • Browser APIs (online status, localStorage) • Custom event systems React cannot control when these update — so it must subscribe safely. 🏗 When Should You Use This Hook? Use it when: ✔ State lives outside React ✔ You’re building a state library ✔ You rely on subscriptions ✔ You want Concurrent React safety If you're just managing local component state → you don’t need this. #ReactJS #FrontendDevelopment #ReactHooks #JavaScript #WebDevelopment #SoftwareEngineering The Modern Solution

𝗪𝗲 𝗷𝘂𝘀𝘁 𝗿𝗲𝗹𝗲𝗮𝘀𝗲𝗱 𝗫𝗿𝗮𝘆𝗥𝗮𝗱𝗮𝗿 𝗝𝗦 𝗦𝗗𝗞 𝘃𝟬.𝟮.𝟬 A TypeScript-first error tracking SDK for Node.js, browser, React, and Next.js that helps you ship features without losing visibility into production errors. What's new in this release: ✅ 𝗢𝗽𝘁𝗶𝗼𝗻𝗮𝗹 𝗯𝗿𝗼𝘄𝘀𝗲𝗿 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 – fetch, XHR, history, and console breadcrumbs ✅ 𝗘𝘅𝗽𝗿𝗲𝘀𝘀 & 𝗞𝗼𝗮 𝗺𝗶𝗱𝗱𝗹𝗲𝘄𝗮𝗿𝗲 for request context and error capture ✅ 𝗣𝗲𝗿-𝗰𝗮𝗽𝘁𝘂𝗿𝗲 𝗰𝗼𝗻𝘁𝗲𝘅𝘁 – add scope for a single event without changing global state ✅ 𝗥𝗲𝗮𝗰𝘁 ErrorBoundary support If you're building with Node, React, or Next.js and want better error insights, take a look. → https://lnkd.in/dHMAz7Tv #JavaScript #TypeScript #React #NodeJS #NextJS #ErrorTracking #DeveloperTools

You don't need as much React state as you think. Most developers reach for `useState` by default. But a lot of "state" is already living somewhere else — in the URL, in server responses, in the route itself. Deriving UI from those sources keeps your app simpler, more shareable, and easier to debug. Instead of this: const [tab, setTab] = useState('overview'); Try this: const tab = new URLSearchParams(location.search).get('tab') ?? 'overview'; Now the active tab survives a refresh, works with the back button, and can be shared via link — all for free. The same principle applies on the server side. Whether you're working with Node.js, a .NET API, or a C# backend, let the server be the source of truth. Fetch it, derive from it, don't duplicate it. Less state means fewer bugs, fewer re-renders, and less mental overhead. Where are you still using local state that could live in the URL or server data instead? #React #JavaScript #WebDevelopment #Frontend #DotNet #NodeJS

I was recently exploring React 19, and a few changes stood out to me compared to previous versions. Actions for async updates Handling form submissions and server interactions feels much cleaner. React now helps manage loading and error states automatically. useOptimistic for instant UI feedback You can reflect updates in the UI before the server responds, which makes applications feel faster and more responsive. Simplified form handling Hooks like useFormStatus and useFormState reduce the amount of boilerplate needed for forms. The new use() API Data fetching inside components becomes more intuitive, as you can directly work with promises. Reduced need for manual memoization With the upcoming React Compiler, many performance optimizations can happen automatically. Overall, React 19 seems focused on improving async workflows, reducing boilerplate, and enhancing performance. I’m still exploring these features and testing them in small projects. Have you tried React 19 yet? What differences did you notice? #React19 #ReactJS #FrontendDeveloper #JavaScript #WebDevelopment #SoftwareEngineering

I was working in Vue3 for the past 4 years at my previous job. Definitely has easier-to-read syntax and a more gentle learning curve, which is nice. React, on the other hand, is more complex. JSX can get confusing, and remembering which component is passing which property to which child can become difficult as the app scales in complexity. With React, developers have access to a handful of hooks, which gives them more control over loading and re-rendering. Because of this and other things, React feels stronger, and definitely feels like you can do more with it. So, if you're just creating a simple front end that doesn't need to do much heavy lifting, definitely go with Vue. If you are building and enterprise-level web app that needs to scale up quite a bit, React is the way to go. Check out the docs for each here: https://lnkd.in/gG2y2jYX https://lnkd.in/gxmaH6vU

React Gotcha I was running a React application using Parcel for the first time in my local development environment. When I ran the application using `npx parcel index.html`, I encountered an error. @parcel/core: Library targets are not supported in server mode. I spent 20 minutes reviewing the terminal error, wondering if my React version was incorrect or if Parcel was installed correctly. After researching the error online, I found that in the package.json file, there was a line with "main": "App.js". I deleted that one line and the code ran perfectly. Lesson: During the npm init process, package.json automatically included a 'main' field. When building the application using Parcel, it incorrectly identifies the 'main' field and interprets it as the main entry point for a library. However, when building the web application, the same 'main' field causes a conflict, resulting in an error. Sometimes, default settings are the ones that break modern tools. #ReactJS #ReactDevelopment #FrontEnd #HandsOn #SoftwareDeveloper