Mastering JavaScript Promises for Asynchronous Programming

Most developers think inheritance in JavaScript works like traditional OOP. It doesn’t. And that confusion leads to messy, over-engineered code. JavaScript uses prototypal inheritance — not classical inheritance. 👉 Objects inherit directly from other objects. 💡 There are 3 main ways inheritance works in JavaScript: 🔹 1. Prototypal Inheritance (Core Concept) const animal = { speak() { console.log("Makes a sound"); } }; const dog = Object.create(animal); dog.bark = function () { console.log("Bark"); }; dog.speak(); // inherited dog.bark(); // own method ✔ Simple ✔ Flexible ✔ Native to JS 🔹 2. Constructor Function Inheritance function Animal(name) { this.name = name; } Animal.prototype.speak = function () { console.log(this.name + " makes noise"); }; function Dog(name) { Animal.call(this, name); // inherit properties } Dog.prototype = Object.create(Animal.prototype); const d = new Dog("Tommy"); d.speak(); ✔ More structured ✔ Used in older codebases 🔹 3. Class-based Inheritance (ES6) class Animal { constructor(name) { this.name = name; } speak() { console.log(this.name + " makes noise"); } } class Dog extends Animal { bark() { console.log("Bark"); } } const dog = new Dog("Rocky"); dog.speak(); dog.bark(); ✔ Cleaner syntax ✔ Easier to read ❗ Still uses prototypes under the hood ⚡ The truth most people miss: Even with classes… 👉 JavaScript is STILL prototype-based. Classes are just syntactic sugar. 🧠 The real upgrade: Stop thinking: “Which syntax should I use?” Start thinking: “How does inheritance actually work under the hood?” Because once you understand prototypes… You don’t just write code— you understand it. What confused you more in JavaScript—closures, promises, or prototypes? 👇 #JavaScript #WebDevelopment #Programming #Frontend #Coding #SoftwareEngineering

Wrote a new blog on Destructuring in JavaScript. One of those features that seems small at first, but has a huge impact on code quality. Covering: • What destructuring actually means • Array vs object destructuring • Default values (and why they matter) • Before vs after comparisons • Writing cleaner, more readable code https://lnkd.in/g2y6rmnt Hitesh Choudhary Chai Aur Code Piyush Garg Akash Kadlag Jay Kadlag Nikhil Rathore #javascript #webdevelopment #frontend #coding #programming #developers #learninpublic #100daysofcode

⚡ JavaScript async code still confusing? You’re not alone. Most beginners learn both: 👉 Promises 👉 async/await …but don’t know when to use which. Let’s simplify it 👇 🔗 Promises → Chain multiple async operations → Good for handling complex flows ✨ async/await → Cleaner, more readable code → Feels like synchronous programming Example mindset: 👉 Promises = “then().then().catch()” chain 👉 async/await = “write async code like normal code” So which one should you use? 💡 Use async/await when: ✔ You want clean and readable code ✔ You’re writing simple to moderate async logic 💡 Use Promises when: ✔ You need parallel execution (e.g., Promise.all) ✔ You’re handling complex chaining scenarios I wrote a simple guide explaining: ✔ Key differences ✔ Real use cases ✔ Best practices developers actually use 🔗 Read here: https://lnkd.in/g6D2_vcg 🚀 Pro tip: Master async/await first — then understand Promises deeply. Comment "JS" and I’ll share async coding interview questions 👇 #JavaScript #WebDevelopment #Frontend #Coding #Developers #AsyncAwait #Programming

Why you should use TypeScript instead of JavaScript? If you’re still using plain JS for a growing automation framework, you’re basically inviting flaky tests into your codebase. Moving to TypeScript (TS) isn't just a "nice to have"—it’s a massive reliability upgrade for any AQA. Here’s why I always advocate for the rewrite: Catching "Dumb" Bugs Early: In JS, you find out you passed a string instead of an int to an API helper only when the test fails in CI. TS catches that typo while you're still writing the code. It turns runtime crashes into simple red squiggly lines in your IDE. The Code IS the Documentation: You don’t have to guess what a data object contains. By defining an interface, you know exactly which fields are available. It makes onboarding new QAs to the framework 10x faster because the types tell them how to use your methods. Autocompletion that Actually Works: Because TS understands your data structures, IntelliSense is actually helpful. You get real suggestions for your Page Objects and API models, which means way less time spent Alt-Tabbing back to the source code to check a method name. Fearless Refactoring: Renaming a core locator or a utility function in a large JS framework is terrifying because you might break a test 50 folders away. In TS, the compiler acts as a safety net. If a change breaks a contract somewhere else, the build fails immediately. Scale and Consistency: When multiple engineers are contributing to the same framework, TS enforces a standard. You can’t "silently" break a teammate’s helper function by passing the wrong data type—the contract is strictly enforced. If you're building a framework that needs to last, JavaScript is a gamble. TypeScript is an investment in stability

🚀 Understanding JavaScript Promises is a must for every developer working with asynchronous code. When I first started learning JavaScript, handling async operations felt confusing—especially with nested callbacks. That’s where Promises changed everything. In this article, I’ve broken down: ✔️ The concept of Promises in a simple way ✔️ How they solve callback hell ✔️ Practical examples for better understanding ✔️ Common mistakes developers should avoid If you're preparing for interviews or improving your JavaScript fundamentals, this guide can be really useful. 🔗 https://lnkd.in/gTUfUvAB Curious to know—do you prefer using Promises directly or async/await in your projects? #JavaScript #SoftwareDevelopment #WebDevelopment #FrontendDevelopment #Programming #CodingTips

⏳ I spent mass amount of time studying RxJS operators. Not because the concepts are impossible — but because the right tools didn't exist. 🔍 A few timeline tools are out there, but they cover barely a handful of operators. The popular ones. The easy ones. What about the rest? What about comparing mergeMap vs concatMap side by side with the same input? I couldn't find a single tool on the internet that did that. 📖 Docs explain behavior in words. Marble diagrams are static. Stack Overflow assumes you already get timing. None of them let you experiment. 🛠️ So I built what I wished existed — and it's live right now for anyone to use. 🔗 RxJS Labx — a free, open-source interactive playground to learn RxJS operators visually. Here's what you get: ▶️ Live Visual Timelines — Watch values flow through operators in real time, not static images 📦 115 Operators — Not just the popular ones. Every operator across 9 categories, each with its own playground, description, and live syntax ⚡ Instant Experimentation — Change inputs, hit Run, see the output update instantly. No setup. No boilerplate. 🔀 23 Side-by-Side Comparisons — The feature that doesn't exist anywhere else. Run mergeMap vs concatMap vs switchMap vs exhaustMap against the same input and finally see exactly how they differ 🔧 Resizable Panels — Drag to resize. Toggle sections on/off. Focus on what matters to you ⚠️ Deprecated Operator Coverage — Full working playgrounds with clear guidance on modern replacements 📱 Works on Mobile & Desktop — Learn on the go or at your desk Whether you're a student just starting with reactive programming, a developer switching to Angular, or someone who's used RxJS for years but still second-guesses operator choices — this is for you. 💡 The whole idea is simple: If you can see it, you can understand it. I built this because I needed it. I'm sharing it because I think the RxJS community needs it too. 🌐 Try it live → https://lnkd.in/dUMQYSfZ ⭐ Star on GitHub → https://lnkd.in/dZBZdQdG Built with Angular & RxJS. Fully open source. Free forever. If this saves even one developer from the confusion I went through — worth it. 🏷️ Tag someone who's learning RxJS. They'll thank you later. 👇 #rxjs #angular #javascript #typescript #webdevelopment #opensource #frontend #reactiveprogramming #learning #angulardev #webdev #softwaredevelopment #coding #programming • Angular (Angular) • RxJS community

Object-Oriented Programming (OOP) is still one of the most powerful ways to write scalable code — especially in TypeScript. But here’s the reality 👇 👉 Many developers use TypeScript… 👉 Few actually use OOP effectively. So I wrote a simple, practical guide covering: ✅ Core OOP concepts (Encapsulation, Inheritance, Polymorphism, Abstraction) ✅ Real-world TypeScript examples ✅ Interfaces & best practices ✅ When to use (and avoid) OOP If you're building scalable apps with Angular, Node.js, or any large system — this will help 👇 🔗 Read here: https://lnkd.in/dWzaiqEk 💬 What’s your take — do you prefer OOP or functional programming? #javascript #typescript #webdevelopment #programming #softwareengineering #angular #nodejs

Day 11 / 30 - Javascript Coding Challenge - Memoization in JavaScript 🚀 Problem: Given a function fn, return a memoized version of that function. A memoized function is a function that will never be called twice with the same inputs. Instead it will return a cached value. You can assume there are 3 possible input functions: sum, fib, and factorial. sum accepts two integers a and b and returns a + b. Assume that if a value has already been cached for the arguments (b, a) where a != b, it cannot be used for the arguments (a, b). For example, if the arguments are (3, 2) and (2, 3), two separate calls should be made. fib accepts a single integer n and returns 1 if n <= 1 or fib(n - 1) + fib(n - 2) otherwise. factorial accepts a single integer n and returns 1 if n <= 1 or factorial(n - 1) * n otherwise.   Solution: function memoize(fn) {  let memoValues = {};   return function (...args) {     const key = JSON.stringify(args)     if (key in memoValues) {       return memoValues[key];     } else {       memoValues[key] = fn(...args);       return memoValues[key];     }   }; } #JavaScript #Memoization #DSA #CodingPractice #100DaysOfCode #FrontendDevelopment

Wrote a new blog on Async/Await in JavaScript: Writing Cleaner Asynchronous Code Covering: • Why async/await was introduced • How async functions actually work • The await keyword concept • Error handling with async code • Comparison with promises https://lnkd.in/gT3R_e5c #JavaScript #WebDevelopment #AsyncAwait #FrontendDevelopment #Programming #Coding #SoftwareEngineering #Developers

Your AI coding assistant has a secret: it doesn't understand your JavaScript. GitHub Copilot, Claude, Cursor — they all work dramatically better with TypeScript. Why? Because types are how AI models understand your codebase. Without them, every suggestion is an educated guess. Research shows 94% of compilation errors in LLM-generated code are type-check failures. TypeScript catches those before you even hit the run button. But that's just one piece of the puzzle. The real story of 2026 is that TypeScript is no longer a choice and became the default:  40% of developers write exclusively in TypeScript (State of JS 2025 Survey - up from 34% the year before)  Adoption grew from 12% to 37% in seven years (JetBrains Dev Ecosystem 2024) Every major framework ships TypeScript-first (Next.js, SvelteKit, Astro, Vue 3)  Zero-config runtimes killed the setup barrier (Deno, Bun, Vite) Builder.io's analysis confirms what teams are seeing in practice: TypeScript leads to "more accurate and reliable" AI-generated code because type context ensures output aligns with existing patterns and valid APIs. JavaScript isn't going anywhere — it's still the runtime. But as a language you actually write? It's becoming the assembly of the web. The war is over. TypeScript won. We wrote a deep dive into why — and what it means for teams still on the fence https://lnkd.in/eqy6gbRJ #TypeScript #JavaScript #DeveloperProductivity #AIAssistedDevelopment #WebDev