JavaScript Functions: Fundamentals and Best Practices

🚀 Just published a new blog on Function Declaration vs Function Expression in JavaScript. In this article, I explain the difference between function declarations and function expressions, how each syntax works, and when to use them. I also covered the basic idea of hoisting with simple examples to make the concept easy for beginners. 📖 Read the full article here: https://lnkd.in/g3Acgus7 Inspired by the amazing teaching of Hitesh Choudhary Sir and Piyush Garg Sir from Chai Aur Code. ☕💻 #javascript #webdevelopment #learninginpublic #chaiAurCode

5 JavaScript concepts that make everything else click. Learn these deeply and frameworks stop being magic. 1. Closures A function that remembers the scope it was created in. This is how callbacks, event listeners, and setTimeout actually work. Not understanding closures = constant bugs you can't explain. 2. The Event Loop JavaScript is single-threaded. The event loop is how async code doesn't block everything else. If you've ever wondered why setTimeout(fn, 0) still runs after synchronous code — this is why. 3. Prototypal Inheritance Every object in JS has a prototype chain. Classes are just syntax sugar over this. Knowing this means you understand how methods are shared and where "cannot read properties of undefined" is actually coming from. 4. this - and how it changes 'this' is not fixed. It depends on how a function is called, not where it's defined. Arrow functions inherit 'this' from their enclosing scope. Regular functions create their own. This one trips up everyone. 5. Promises and the microtask queue Promises don't just "make async code cleaner." They run in the microtask queue, which runs before the next macrotask (setTimeout). Understanding this makes async debugging dramatically easier. Which of these gave you the biggest headache? 👇 #webdeveloper #coding #javascript

What To Know in JavaScript (2026 Edition) An overview of what's new in language features, frameworks, runtimes, build tools, testing, and more.

JavaScript in 2026 has a LOT going on — and most devs are sleeping on the language-level stuff. ECMAScript 2025 shipped Iterator Helpers, Set methods, and Promise.try(). ES2026 is bringing the Temporal API (finally, no more date libraries), Explicit Resource Management with the using keyword, and a TypeScript v6 that flips strict mode on by default — which will quietly break a lot of projects that think they’re “fine.” My hot take: the signal that matters most here isn’t the new syntax. It’s that TypeScript is now the #1 language on GitHub with 66% YoY growth, AND a Go-based compiler is coming in v7 that promises ~10x speed. The tooling race is accelerating faster than most teams are upgrading. Meanwhile npm had one of its worst years for supply chain security — multiple incidents, one hitting 796 packages with 20M+ downloads. If you’re not actively hardening your dependency pipeline, you’re hoping for luck. The JS ecosystem is consolidating fast around Vite+, React Server Components, and AI-assisted code. The devs who understand why the architecture decisions are being made will outlast the ones who just follow the changelog.

🚀 Just published a new blog on Async/Await in JavaScript: Writing Cleaner Asynchronous Code. In this article, I explain how async/await helps handle asynchronous operations in a cleaner and more readable way compared to callbacks and promises. I covered how async functions work, how to use await, and simple examples to understand the flow step by step. 📖 Read the full article here: https://lnkd.in/gTbGmXPQ Inspired by the amazing teaching of Hitesh Choudhary Sir and Piyush Garg Sir from Chai Aur Code. ☕💻 #javascript #webdevelopment #learninginpublic #chaiAurCode

🚀 Just published a new blog on Understanding Objects in JavaScript. In this article, I explain what objects are, why they are important in JavaScript, and how they store data using key–value pairs. I also covered creating objects, accessing properties using dot and bracket notation, updating values, adding or deleting properties, and looping through object keys. 📖 Read the full article here: https://lnkd.in/gbxx6N2G Inspired by the amazing teaching of Hitesh Choudhary Sir and Piyush Garg Sir from Chai Aur Code. ☕💻 #javascript #webdevelopment #learninginpublic #chaiAurCode

🚀 Just published a new blog on JavaScript Arrays 101: Storing Multiple Values Easily. In this article, I explain the basics of arrays in JavaScript—what arrays are, why we use them, and how they help store multiple values in a single variable. I also covered creating arrays, accessing elements using index, updating values, using the length property, and looping through arrays with simple examples. 📖 Read the full article here: https://lnkd.in/gEvcCHGv Inspired by the amazing teaching of Hitesh Choudhary Sir and Piyush Garg Sir from Chai Aur Code. ☕💻 #javascript #webdevelopment #learninginpublic #chaiAurCode

Many developers and students often get confused between JavaScript code execution for synchronous and asynchronous code. I was revisiting these fundamentals today and thought of sharing a simple breakdown that helped me connect all the dots. Here’s the Actual Flow Behind Node.js Execution JavaScript is Single-Threaded JavaScript runs on a single thread, meaning it executes one task at a time. This keeps things simple and avoids complex concurrency issues. But then the question is — How does Node.js handle multiple requests efficiently? That’s where V8, Event Loop, and libuv come into play. V8 Engine — The JavaScript Executor V8 is the engine that executes JavaScript code. It converts JavaScript into machine code. Handles synchronous code execution, so whenever sync code appears, It goes directly to Call Stack, V8 executes it immediately What Happens When Async Code Appears? When Node.js encounters async code like: setTimeout, File read, Database calls, API requests Instead of blocking execution, It sends async tasks to libuv libuv (C-Libarary) — The Background Worker libuv handles: Async I/O operations Thread pool tasks Event loop management Once async task completes: Callback goes to Callback Queue Event Loop — The Traffic Manager Event Loop continuously checks: Is Call Stack empty? Is there anything in Callback Queue? If both conditions satisfy: Event Loop pushes callback to Call Stack and V8 executes callback Final Flow Summary Sync Code → Call Stack → V8 executes Async Code → libuv Task Completed → Callback Queue Event Loop checks → Call Stack empty Callback → Call Stack V8 executes callback Understanding this core flow clears most of the confusion around synchronous vs asynchronous JavaScript in Node.js. #NodeJS #JavaScript #BackendDevelopment #EventLoop #V8 #libuv #AsyncProgramming #WebDevelopment #Learning #SoftwareEngineering

🚀 Just Published: Blog 5 of Javascript blog series Understanding Functions in JavaScript (Beginner Friendly) Functions are one of the most important building blocks in JavaScript—but many beginners struggle with: 👉 Function Declaration vs Function Expression 👉 When to use which 👉 Why some functions work before defining (hoisting) So I wrote a simple, practical guide to understand JS functions. Blog Link: https://lnkd.in/gJQMHUgt Hitesh Choudhary Piyush Garg and Chai Aur Code team Would love your feedback 🙌 #JavaScript #WebDevelopment #Coding #LearnToCode #Programming

🚀 Just published a new blog on Arrow Functions in JavaScript. In this article, I explained: • What Arrow Functions are • Basic syntax and parameters • Implicit vs Explicit return • Difference between normal functions and arrow functions • Simple examples using math operations and "map()" Arrow functions help make JavaScript code shorter, cleaner, and more readable, which is why they are widely used in modern JavaScript development. 📖 Read the full article here: https://lnkd.in/gipX6C2x Big thanks to Hitesh Choudhary Sir and Piyush Garg Sir for their amazing teaching through Chai Aur Code that keeps inspiring me to learn and share. ☕💻 #javascript #webdevelopment #arrowfunctions #chaiAurCode #learninginpublic