Piyush Saxena’s Post

Honest opinion: I resisted TypeScript for longer than I should have. “It’s just extra syntax.” “It slows me down.” “JavaScript is fine.” I was wrong. Here’s what changed my mind - working on a large banking application with 10+ developers. Without TypeScript: ∙ Props getting passed incorrectly across components ∙ API response shapes being assumed, not enforced ∙ Bugs that only showed up in production With TypeScript: ∙ Errors caught before the code even runs ∙ Components become self-documenting ∙ Refactoring feels safe instead of scary The “slowdown” in writing types saves 10x the time in debugging. If you’re still on the fence about TypeScript — just try it on one project. That’s all it takes. What made you finally switch to TypeScript? 👇 #TypeScript #ReactJS #Frontend #WebDevelopment #JavaScript

𝐃𝐚𝐲 1/30 – 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐒𝐞𝐫𝐢𝐞𝐬: 𝐖𝐡𝐚𝐭 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐫𝐞𝐚𝐥𝐥𝐲 𝐢𝐬 (𝐛𝐞𝐲𝐨𝐧𝐝 𝐭𝐡𝐞 𝐝𝐞𝐟𝐢𝐧𝐢𝐭𝐢𝐨𝐧) Most people say: 👉 “Node.js is a JavaScript runtime built on Chrome’s V8 engine.” That’s correct… but honestly, it’s not useful in real-world discussions. Let’s understand it like an engineer 💡 𝐍𝐨𝐝𝐞.𝐣𝐬 𝐢𝐬 𝐍𝐎𝐓 𝐣𝐮𝐬𝐭 𝐚 𝐫𝐮𝐧𝐭𝐢𝐦𝐞 — 𝐢𝐭’𝐬 𝐚𝐧 𝐞𝐯𝐞𝐧𝐭-𝐝𝐫𝐢𝐯𝐞𝐧, 𝐧𝐨𝐧-𝐛𝐥𝐨𝐜𝐤𝐢𝐧𝐠 𝐬𝐲𝐬𝐭𝐞𝐦 𝐝𝐞𝐬𝐢𝐠𝐧𝐞𝐝 𝐟𝐨𝐫 𝐡𝐚𝐧𝐝𝐥𝐢𝐧𝐠 𝐜𝐨𝐧𝐜𝐮𝐫𝐫𝐞𝐧𝐭 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭𝐥𝐲. What does that mean? 1. It uses a 𝐬𝐢𝐧𝐠𝐥𝐞-𝐭𝐡𝐫𝐞𝐚𝐝𝐞𝐝 𝐞𝐯𝐞𝐧𝐭 𝐥𝐨𝐨𝐩 2. It delegates heavy tasks (I/O, network, file operations) to the system 3. It doesn’t wait… it keeps moving 🔁 𝐑𝐞𝐚𝐥-𝐰𝐨𝐫𝐥𝐝 𝐞𝐱𝐚𝐦𝐩𝐥𝐞: Imagine your backend API is: 1. Reading files 2. Calling external APIs 3. Querying databases In traditional blocking systems: ➡ One request waits for another In Node.js: ➡ Multiple requests are handled 𝐰𝐢𝐭𝐡𝐨𝐮𝐭 𝐰𝐚𝐢𝐭𝐢𝐧𝐠 🧠 𝐒𝐢𝐦𝐩𝐥𝐞 𝐚𝐧𝐚𝐥𝐨𝐠𝐲: Node.js is like a smart manager: Assigns tasks to workers Doesn’t sit idle Keeps taking new tasks ⚠️ 𝐁𝐮𝐭 𝐡𝐞𝐫𝐞’𝐬 𝐭𝐡𝐞 𝐭𝐫𝐮𝐭𝐡 𝐦𝐨𝐬𝐭 𝐭𝐮𝐭𝐨𝐫𝐢𝐚𝐥𝐬 𝐬𝐤𝐢𝐩: Node.js is NOT always the best choice. ❌ CPU-heavy tasks (like image processing, large calculations) can block the event loop ❌ Poor async handling can still cause performance issues 🔥 𝐅𝐫𝐨𝐦 𝐦𝐲 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞: In one of my projects, instead of processing everything synchronously, we used 𝐪𝐮𝐞𝐮𝐞-𝐛𝐚𝐬𝐞𝐝 𝐚𝐬𝐲𝐧𝐜 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 (similar to Service Bus pattern). This helped us: ✔ Avoid API timeouts ✔ Handle large workloads ✔ Improve system scalability ✅ 𝐓𝐚𝐤𝐞𝐚𝐰𝐚𝐲: Node.js shines when: ✔ You have I/O-heavy applications ✔ You need high concurrency ✔ You design it with async patterns correctly 📌 Tomorrow (Day 2): 𝐃𝐞𝐞𝐩 𝐝𝐢𝐯𝐞 𝐢𝐧𝐭𝐨 𝐄𝐯𝐞𝐧𝐭 𝐋𝐨𝐨𝐩 (𝐭𝐡𝐞 𝐡𝐞𝐚𝐫𝐭 𝐨𝐟 𝐍𝐨𝐝𝐞.𝐣𝐬) #NodeJS #BackendDevelopment #JavaScript #FullStack #SoftwareEngineering #SystemDesign

🚀 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁 7.0 𝗷𝘂𝘀𝘁 𝗱𝗿𝗼𝗽𝗽𝗲𝗱 (𝗯𝗲𝘁𝗮)... 𝗮𝗻𝗱 𝗶𝘁'𝘀 𝗮 𝒃𝒊𝒈 𝒅𝒆𝒂𝒍 Not because of new features. Because of what's under the hood. ⚡ 1. 𝗨𝗽 𝘁𝗼 10𝘅 𝗳𝗮𝘀𝘁𝗲𝗿 𝗯𝘂𝗶𝗹𝗱𝘀 Yes, really. Massive performance gains thanks to: 🔹 Native execution 🔹 Parallelism 🔄 2. 𝗧𝗵𝗲 𝗰𝗼𝗺𝗽𝗶𝗹𝗲𝗿 𝘄𝗮𝘀 𝗿𝗲𝘄𝗿𝗶𝘁𝘁𝗲𝗻 𝗶𝗻 𝗚𝗼 TypeScript is no longer running on JavaScript. It's now a native system. 🧠 3. 𝗦𝗮𝗺𝗲 𝗯𝗲𝗵𝗮𝘃𝗶𝗼𝗿, 𝗻𝗲𝘄 𝗲𝗻𝗴𝗶𝗻𝗲 🔹 Same type system 🔹 Same semantics 👉 Just dramatically faster 🧪 4. 𝗔𝗹𝗿𝗲𝗮𝗱𝘆 𝘂𝘀𝗲𝗱 𝗶𝗻 𝗿𝗲𝗮𝗹-𝘄𝗼𝗿𝗹𝗱 𝗰𝗼𝗱𝗲𝗯𝗮𝘀𝗲𝘀 Multi-million line projects are already running it. And the feedback?... Huge speedups. 🔁 5. 𝗦𝗺𝗼𝗼𝘁𝗵 𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗽𝗮𝘁𝗵 You can run TS 6 and TS 7 side-by-side. 👉 No risky upgrade needed. 🧠 The real shift: TypeScript is moving from: "language innovation" ➡️ to: "developer experience at scale" 🚀 The takeaway: The future of TypeScript isn't more features... 👉 It's 𝒇𝒂𝒔𝒕𝒆𝒓 𝒇𝒆𝒆𝒅𝒃𝒂𝒄𝒌 𝒍𝒐𝒐𝒑𝒔 🔗 Source: https://lnkd.in/dQtvQHjz #TypeScript #JavaScript #Frontend #Backend #Performance #DX

You add TypeScript to the project. Half the types are any. You basically wrote JavaScript with some extra syntax. TypeScript doesn't make your code safer. You do. And using any turns off the whole tool. Here's what most people miss: any doesn't stay where you put it. It spreads. function getUser(id: string): any { return api.fetch("/users/" + id); } const user = getUser("123"); const name = user.name; const upper = name.toUpperCase(); Every variable in this chain is any. No autocomplete, no safe changes, no errors caught before release. One any at the start shuts down the whole process. This is type erosion. It acts like tech debt — hidden until it causes problems. Before you type any, ask yourself two questions. First question: Do I really not know the type? If the data comes from an API — describe its structure. A partial type is much better than any. Second question: Am I just avoiding a type error? The compiler warns you, and you ignore it. That's not a fix. It's just @ts-ignore with extra steps. Use unknown instead. It means "I don't know" but makes you check before using it. any trusts without question. unknown requires proof. If your code has more than 5% any, you're not really using TypeScript. You're just adding decorations to JavaScript. Run npx type-coverage. Look at the number. Then decide. any is not a type. It's a surrender. #TypeScript #Frontend #JavaScript #WebDev #SoftwareEngineering #CodeQuality

I recently faced a frustrating (and honestly dangerous) issue while working across multiple environments: 👉 My backend server (NestJS) was running perfectly 👉 No TypeScript errors during development 👉 Deployed successfully — everything worked fine Then I did something simple: ➡️ Cloned the same project on a new machine And suddenly… ❌ Dozens of TypeScript errors appeared ❌ Types that were “fine” before were now breaking ❌ The same codebase behaved completely differently What actually happened? At first, it feels like TypeScript is inconsistent. But after digging deeper, the truth is: TypeScript was always correct — my environments were not. Root Cause Different environments were enforcing TypeScript differently: One setup allowed loose typing (any, missing checks) Another enforced strict rules Build configs (NestJS tsconfig.build.json) were not aligned Dev server didn’t fully validate types Cached builds masked real issues So: Same code → different machines → different results Why this is dangerous Bugs stay hidden during development Production may run with unsafe code New developers cloning your repo face unexpected failures “Works on my machine” becomes a real problem How I fixed it (and how you should too) ✅ Enforced strict TypeScript everywhere: "strict": true, "noImplicitAny": true, "strictNullChecks": true ✅ Synced all configs (especially NestJS build vs dev configs) ✅ Made sure builds fail on type errors (no silent ignoring) ✅ Disabled Next.js type ignoring: typescript: { ignoreBuildErrors: false } ✅ Added ESLint rules to block unsafe patterns (any, etc.) ✅ Introduced a mandatory type-check step: tsc --noEmit Key Takeaway “If TypeScript isn’t enforced consistently, it gives a false sense of safety.” Your app might run perfectly… Until it doesn’t — on another machine, another environment, or in production. Final Thought As developers, we don’t just write code — we define environments. Make sure your TypeScript rules are: Strict Consistent Enforced everywhere “Strong typing doesn’t protect you… consistency does.” Otherwise, you’re not really using TypeScript — you’re just hoping it works. Have you ever faced the “works on my machine” TypeScript problem? Would love to hear how you solved it. #TypeScript #NextJS #NestJS #ReactJS #WebDevelopment #Frontend #Backend #FullStack #SoftwareEngineering #CleanCode #DeveloperExperience #JavaScript

🔥 I wasted HOURS writing the same 15 lines of fetch logic in every React component. So I fixed it. Permanently. Introducing `useFetch` — a 3KB TypeScript hook that handles: ✅ Auto-caching (no more duplicate API calls) ✅ Request cancellation (zero memory leaks) ✅ Full TypeScript generics ✅ Loading & error states out of the box The best part? ZERO dependencies. 👨💻 Built with React + TypeScript. Open-sourced with full documentation. [Insert your Carbon.sh comparison image here] Fellow React devs — what's ONE boilerplate pattern you're tired of writing? 👇 Drop a comment. Let's build better tools together. #ReactJS #OpenSource #FrontendDevelopment #TypeScript #WebDev

🚀 𝗗𝗮𝘆 𝟭: 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 👉 Build a Strong Base TypeScript isn’t just “JavaScript with types”. It’s about writing code that is: ✔ Predictable ✔ Maintainable ✔ Bug-resistant 🔹 What problem does TypeScript solve? JavaScript → Dynamic → Errors at runtime ❌ TypeScript → Static → Errors during development ✅ 👉 Catch issues before your app runs. 🔹 Core Types You Must Know • string, number, boolean → basics • any → disables safety (avoid) • unknown → safe alternative • void → no return • never → never completes 🔹 Functions with Type Safety function add(a: number, b: number): number { return a + b; } 👉 Prevents invalid usage like passing strings. 🔹 Interfaces vs Types interface User { id: number; name: string; } type Status = "active" | "inactive"; ✔ Interface → object structure ✔ Type → unions & flexibility 🔹 Union Types (Real-world) type ApiStatus = "loading" | "success" | "error"; 👉 Perfect for handling UI states cleanly. 🔹 Strict Mode (Must Enable) "strict": true ✔ Prevents null errors ✔ Enforces better coding discipline 💡 Final Thought You can skip fundamentals… But your code won’t scale without them. ⏭️ Tomorrow: Generics, Utility Types & Real Power of TypeScript 🔥 #TypeScript #Frontend #Angular #CleanCode #SoftwareEngineering

TypeScript 7.0 Beta is here and OH MY GOODNESS it's going to be FAST! So, they ported the entire compiler from JavaScript to Go. Native code + shared memory parallelism. The result? Million-line codebases that used to take minutes now take seconds. Some highlights that made me grin: * Parallel type-checking – 4 workers by default, configurable with --checkers. * Parallel project reference builds, which let you build multiple projects at once. * Same semantics – they methodically ported, not rewrote. The code behaves exactly the same, just faster. * There's a VS Code extension already. The beta package is @typescript/native-preview. Also, they kept TypeScript 6.0 compatibility side-by-side (tsc6), so zero risk. https://lnkd.in/dRGGX6qp

Framework churn is real, but fundamentals never change. We chase tools like they're the problem. "If we just switch to React, we'll be faster." "If we adopt Next.js, scaling gets easier." "If we go serverless, operations disappear." Six months later: same problems, different syntax. The truth is brutal. Your framework isn't holding you back. Your fundamentals are. If you don't understand: - How to structure state logically - Why N+1 queries destroy performance - How to write testable code - What makes an API design good or bad - Why caching matters ...then switching frameworks won't save you. You'll just be slow in TypeScript instead of JavaScript. I'm not anti-framework. They matter for ergonomics and velocity. But they're not magic. They're tools for people who already know what good code looks like. Learn the fundamentals first. Then pick the framework that fits. Not the other way around. #WebDevelopment #SoftwareEngineering #Programming #CleanCode #CodeQuality #BestPractices #SoftwareArchitecture #SystemDesign #ScalableSystems #Fundamentals #ComputerScience #DevMindset #LearnToCode #CodingJourney #DevGrowth #JavaScript #ReactJS #FrontendDevelopment #BackendDevelopment #TechTrends #Frameworks #DeveloperLife #BuildInPublic #CodeSmart #EngineeringExcellence #HotTake #UnpopularOpinion #TechTruths #DevReality

🚀 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