Semver in package.json: ^, ~, or exact version

TypeScript 6.0 dropped. Here's what actually matters for your project 🧵 🆕 What's new: • Temporal API types (finally Stage 4!) • Map.getOrInsert() — upsert in one line • RegExp.escape() — safe regex from user input • dom.iterable is now included in dom automatically • Subpath imports with #/ prefix ⚠️ New defaults that will break things: • strict is now TRUE by default • types defaults to [] — add "node" explicitly or things will go missing • rootDir defaults to "." • module defaults to esnext ❌ Start removing these now (gone in TS 7.0): • baseUrl • moduleResolution: node • target: es5 • module: amd/umd/systemjs • outFile TS 6.0 is a transition release — the real target is 7.0 with parallel type checking and a native compiler port. If you're seeing deprecation warnings after upgrading: fix them now, not later. What's your migration plan? Drop it in the comments 👇 #TypeScript #JavaScript #WebDevelopment #Frontend

Day 93 of my #100DaysOfCodeChallenge Node.js Revision Continues Today, I focused on strengthening my understanding of error handling and callbacks in Node.js. Here are my key takeaways: Error Handling I explored how Node.js uses the error-first callback pattern and how proper error handling is critical in asynchronous environments. Callback Functions A callback is a function passed into another function to be executed later—this is a core concept behind Node’s non-blocking architecture. Callback Abstraction I learned how to make my code more reusable and flexible by passing different behaviors into a single function using callbacks. This revision phase is helping me move beyond just writing code to actually understanding how and why things work under the hood. #100DaysOfCode #NodeJS #BackendDevelopment #JavaScript #SoftwareEngineering

One bad loop can freeze your entire server. Not slow it down. Freeze it. That’s the part most Node/NestJS devs underestimate 👇 We love saying “Node is non-blocking.” But that’s only true until you block it. The event loop can only move forward when your code lets it. If one task takes too long, everything else waits behind it. What actually blocks the event loop? • Synchronous operations • Heavy CPU work (large loops, calculations) • Huge JSON parsing or stringifying • Anything that keeps the call stack busy for too long Here’s the real problem: One heavy request doesn’t just slow itself down. It blocks every other user at the same time. One user clicks → everyone waits. Think of Node like a single cashier. If one customer takes 5 minutes, the whole line stops moving. No matter how many users you have — everything is stuck behind that one task. The event loop isn’t magic. It’s just fast… until you block it. #NodeJS #NestJS #BackendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #EventLoop #Performance #Scalability #Programming #CodingTips

Stop the console.log madness. 🛑 We’ve all been there: chasing a bug for hours, littering the code with console.log('here'), and accidentally pushing those logs to production. 🤦♂️ After 2 years of Full Stack development, I finally found a better way. The Fix: VS Code JavaScript Debug Terminal 🛠️ Instead of a standard terminal: Open the Terminal dropdown. Select "JavaScript Debug Terminal." Run your service normally (npm start). Why it’s a game changer: Breakpoints: Pause code execution instantly. Live Inspection: Hover over variables to see real-time data. Cleaner Code: Zero logs to delete before you push. Simple, clean, and much faster. Your production logs will thank you. #Javascript #NodeJS #VSCode #WebDev #CodingTips #FullStack

🧵 "Node.js is single threaded" everyone says that. But this is only half of the truth. Yes, Node.js is single threaded in its main execution the Event Loop and your code run on one thread. But using many other things, we can make it behave like a multiprocess or multithreaded system that performs perfectly even for CPU intensive tasks: 1-libuv (the underlying engine) It is the underlying C++ library in Node. Through it we can handle: A)Network I/Os : by dealing with the OS kernel directly So the kernel handles it asynchronously and notifies Node when done, so the main thread never blocks. B)File I/Os and DNS operations : through a thread pool that abstracts our main thread from that heavy load. 2-Event Loop Partitioning: But if the load is heavier than we thought, we need to handle it differently. -We can do partitioning making heavy operations done in multiple phases of the Event Loop so we don't starve any phase. -Using setImmediate(), I can distribute my work across different check phase iterations, so other phases keep running alongside the heavy operation without being starved. 3-Worker Threads & Child Processes Okay but what if the task is even heavier CPU intensive work? -Then we have Node Workers I can make my main thread do some work and offload intensive CPU tasks to other threads. (Yes, other threads just like a multithreading system.) Or we can even use Child Processes to offload work onto entirely different processes, each with their own memory and dedicated everything. So now we get it Node.js is single threaded in its code execution, but we can still make it behave like any concurrent parallel system.  It's not a limitation. It's a deliberate design choice. #nodejs #backend #javascript #SoftwareEngineering

HTTP Status Codes Every Developer Should Know If you work with APIs, websites, or backend systems, these status codes are part of your daily life. Understanding them can save hours of debugging and help you build better applications. ✅ 2xx – Success → Request completed successfully 🔄 3xx – Redirection → Resource moved or cached version used ⚠️ 4xx – Client Errors → Something wrong in the request 🔥 5xx – Server Errors → Problem on the server side Knowing what each code means helps developers troubleshoot faster, improve user experience, and create reliable systems. Save this cheat sheet for future reference. Which HTTP status code do you see the most in your projects? 👇 #WebDevelopment #HTTP #StatusCodes #BackendDevelopment #FrontendDevelopment #API #Coding #Programming #Developers #SoftwareEngineering #NodeJS #JavaScript #FullStackDeveloper #TechTips #LearnToCode

I noticed most Node.js logging solutions are either too heavy or too minimal. So I built my own — logpaint 🎨 A lightweight, zero-dependency colored logger with built-in levels and TypeScript support. Instead of adding another heavy logging library, I wanted something: • Minimal • Zero config • Typed • Colorful output • Runtime level switching 💻 Website - https://lnkd.in/gp3HgeBX 🔴 NPM - https://lnkd.in/gNuSPXd4 ♐ GitHub - https://lnkd.in/gVXkyu-P Would love feedback from fellow developers 🙌 What feature should I add next? #opensource #nodejs #typescript #javascript #buildinpublic #developers #webdev #programming

Two days ago (Apr 21), TypeScript 7.0 Beta was released 🏄🏼♀️ At this release, the team behind TypeScript didn’t just add features in version 7.0, they rebuilt the compiler using #Go while keeping the exact same type-checking logic. There should be no surprises in behavior, but a #completely #different #performance #profile. In many cases, builds are up to *~10x faster*, and the editor finally feels lightweight even on large codebases. The new compiler is truly parallel, it makes all the parsing, type-checking, and emitting on multiple workers. Some new cool flags: --checkers (type-check workers) and --builders (parallel project builds). They also doubled down on stricter defaults from 6.0 - #strict is enabled, modern module targets are the default, and a lot of legacy flags are removed. One can already try it side-by-side with the current setup, as the attached image shows. Read more about the release announcement here - https://lnkd.in/dgQqqRBn #TypeScript #JavaScript #WebDevelopment #SoftwareEngineering #BuildTools #DX

🔥 JavaScript Arrays — Hidden Performance Cost You Might Ignore Hey devs 👋 We all use array methods daily: .map() .filter() .reduce() But here’s something most developers don’t think about 👇 👉 Chaining multiple methods: arr.filter(...).map(...).reduce(...) Looks clean… but: ❌ Creates multiple intermediate arrays ❌ Increases memory usage ❌ Impacts performance on large data 💡 Better approach (when needed): ✔ Combine logic in a single loop ✔ Use reduce smartly ✔ Optimize only for large datasets ⚡ Senior rule: “Readable code first… optimized code when necessary.” 👉 Insight: Not every clean-looking code is efficient. Have you optimized array-heavy logic before? #javascript #performance #webdevelopment #programming #frontend #backend #softwareengineering #Coding #TechCareers #Programming #success

React in 2026 isn't about writing code, it's about orchestrating intent. The era of manual useMemo and fighting with CSS injection is dead. If your stack hasn't evolved toward these five pillars, you’re shipping legacy code: Compiler-First: Stop micro-managing re-renders. Let the compiler handle memoization. Local-First: Primary state belongs on the device. Zero loading states via WASM DBs. Server Actions: Direct mutation layers. No more bloated client-side state managers. Agentic UI: Components that adapt to schemas in real-time, not hard-coded layouts. Zero-Runtime Styling: Tailwind 4.0 and StyleX won the performance war. 0ms runtime or bust. Adapt or get left behind. . . #ReactJS #WebDevelopment #SoftwareArchitecture #Frontend #Programming #TechTrends2026 #TailwindCSS #LocalFirst