Node Weekly: State of JavaScript 2025 Results and Updates

I just published a new blog about how Node.js actually works under the hood. When we use Node.js it feels like JavaScript can do everything - read files, make network requests, talk to the OS. But JavaScript alone can't do those things. Inside Node.js, a few key components work together: V8 → runs JavaScript C++ bindings → connect JS to native code libuv → handles async operations and the event loop Understanding this made Node.js architecture much clearer for me, so I wrote a simple breakdown. Read it here: https://lnkd.in/dhYkXwQc #nodejs #javascript #backend #webdevelopment #chaicode

New Blog Published: Understanding global vs globalThis in JavaScript Ever wondered why global works in Node.js but breaks in the browser? Many developers use global variables but don’t fully understand how JavaScript handles them across different environments. In this blog, I break down: • What global really is in Node.js • Why browsers don’t recognize global • How globalThis solves this problem • Key differences with real examples • When to use globalThis in real projects Trick for You all:- 𝗜 𝗵𝗮𝘃𝗲 𝗲𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱 𝗴𝗹𝗼𝗯𝗮𝗹𝗧𝗵𝗶𝘀 𝗮𝘀: 𝗦𝗮𝗯𝗸𝗮 𝗠𝗮𝗹𝗶𝗸 𝗘𝗸 ,haha😝😆! Simple, practical, and straight to the point. 🔗 Read here: https://lnkd.in/gCNvZnqg Grateful to learn from Hitesh Choudhary sir, Piyush Garg sir, Akash Kadlag sir and Chai Aur Code team. #JavaScript #NodeJS #WebDevelopment #Programming #BackendDevelopment #ChaiCode

Many developers jump directly into React hooks, libraries, and frameworks. But the real foundation is much simpler 👇 ✅ Strong JavaScript fundamentals React is just JavaScript at its core. If you truly understand: • Closures • Scope & Hoisting • Async/Await & Promises • Array methods (map, filter, reduce) • ES6 concepts (arrow functions, destructuring, spread) Then React becomes easier, cleaner, and more powerful. Libraries can change. Frameworks can evolve. But strong JavaScript fundamentals stay forever. 💯 Before mastering React… master JavaScript. What’s your opinion? 👇 #ReactJS #JavaScript #FrontendDevelopment #WebDevelopment #CodingJourney

After writing JavaScript for years, switching to TypeScript was a huge productivity boost. Example problem in JavaScript: function calculateTotal(price, quantity) { return price * quantity } What if someone passes a string? calculateTotal("10", 5) This may silently create bugs. TypeScript solves this: function calculateTotal(price: number, quantity: number): number { return price * quantity } Now the compiler protects your code before it reaches production. This is why most modern projects use: • React + TypeScript • Node.js + TypeScript • Next.js + TypeScript Type safety = fewer production bugs. Are you using TypeScript in your projects? #typescript #javascript #reactjs #nodejs #softwareengineering

Understanding the Node.js event loop finally made async JavaScript click for me. Here’s a simple example that confused me earlier: console.log("Start"); setTimeout(() => console.log("Timeout"), 0); Promise.resolve().then(() => console.log("Promise")); console.log("End"); Many beginners expect: Start → Timeout → Promise → End But the actual output is: Start → End → Promise → Timeout Why? Because Promises (microtasks) run before timer callbacks in the event loop. That one concept explains a lot of async behavior in Node.js. Once I understood this, debugging async issues became much easier. What JavaScript concept took you the longest to understand? #nodejs #javascript #backend #webdevelopment #softwareengineering

I bet you didn't know this. "Stale Closure" is not a Javascript term. It is term invented by React developers because they didn't understand how closure works. JS developers apart from react never faced issues like "stale closure" and this term can into existence after the release of react 16 when they added function component which used the closure pattern. A Closure is formed in Javascript when a nested/Inner functions stores a references to it's surrounding lexical environment. Even simply put, when a functions holds on to the variable reference of it's outer environment. When a closure is formed the values still change, they are never stale because the reference is still live and it's not a snapshot what react developers usually will tell you. The reason "Stale closure" exists is because how react team implement the internal of a useState hook. Because if you make a minor adjustment in the internal implementation of the useState hook, this problem can be solved. It's too much to explain in a post maybe I'll write a article explain how "Stale closure" is a illusion.

🚀 Day 1 to 5 of Learning React — Understanding JSX & Babel (Behind the Scenes) Today I explored how React actually works under the hood, and honestly… it’s pretty cool • What is JSX? JSX stands for JavaScript XML. It allows us to write HTML-like code inside JavaScript. Example: const element = <h1>Hello World</h1>; But here’s the catch Browsers don’t understand JSX directly • Role of Babel Babel is a transpiler that converts JSX into normal JavaScript. Above JSX becomes: React.createElement("h1", null, "Hello World"); So basically: • JSX → Babel → JavaScript → Browser • How React works behind the scenes React creates a Virtual DOM Instead of updating the real DOM directly (which is slow), React: 1. Creates a Virtual DOM (lightweight copy) 2. Compares changes (Diffing) 3. Updates only the changed parts (Reconciliation) • This makes React super fast Key Takeaway: React is not magic — it’s just smart optimization + JavaScript power. # Next: Diving deeper into Components & Hooks #ReactJS #WebDevelopment #JavaScript #LearningInPublic #Frontend #CodingJourney Vikas Kumar Prashant Pal Pratyush Mishra Prakash Sakari Likitha S Rajit Ram GeeksforGeeks

Most beginners jump straight to frameworks like React. I chose to go back to basics with vanilla JavaScript instead. 🧠 I built a Stories app using HTML, CSS & JavaScript (ES5) — not for show, but to strengthen my core fundamentals. No libraries. No shortcuts. Just logic, structure and pure JavaScript. This project helped me sharpen: • DOM manipulation • Event handling • Managing UI state • Writing cleaner, structured ES5 code • Understanding user interactions Sometimes the fastest way forward is to go back to the roots. Master the fundamentals, and frameworks become easier. 👉 Curious to know: What core concept should every frontend developer master before moving to frameworks? 🔗 Live Demo: https://lnkd.in/gSmm2N_g 📂 GitHub: https://lnkd.in/gRVcS5vq #BuildInPublic #JavaScript #FrontendDeveloper #WebDevelopment #LearningJourney #100DaysOfCode #Coding

🚀 Today I learned something really interesting about the Node.js Event Loop. I always assumed the event loop behaves the same everywhere, but it actually works differently in the Browser vs the Node.js environment. In Node.js, the event loop goes through multiple phases such as: • Timers (Expired Callbacks) • I/O Polling • setImmediate • Close Callbacks Understanding these phases really helped me see how asynchronous operations are scheduled and executed under the hood. It also made me realize how important it is to understand core fundamentals, not just frameworks. The deeper you go into JavaScript, the more fascinating it gets. ⚡ Thanks Piyush Garg and Hitesh Choudhary for such a great explanation. #NodeJS #JavaScript #BackendDevelopment #LearningInPublic #EventLoop

🚀 One of the reasons Node.js is so powerful is its event loop. Instead of creating a new thread for every request, Node.js uses a non-blocking event loop to handle thousands of operations efficiently. This is why Node.js performs so well for APIs and real-time applications. Understanding how the event loop works can help you write more efficient backend code. I made a quick breakdown in this carousel 👇 Did the event loop confuse you when you first learned Node.js? #nodejs #backend #javascript #webdevelopment