Sourav S.’s Post

Anders Hejlsberg began working on TypeScript in 2012 with a specific goal in mind: addressing a practical challenge rather than creating a competitor to JavaScript. At that time, JavaScript was pivotal to web development, yet it faced limitations in scaling for extensive, collaborative code projects. The industry witnessed the delivery of vast amounts of weakly typed code, leading to complexity beyond manageability as systems expanded. https://lnkd.in/guf6_kEu #javascript #frontend #typescript #ai

🚀 React Conf 2025: React Just Got Smarter (and a Lot Harder to Break) React Conf 2025 wasn’t just another framework update — it felt like React finally learned from all our collective debugging sessions. The result? Cleaner state management, safer effects, and smoother UIs. Here are the highlights every frontend developer should know 👇 ⚡ 1. useEffectEvent — The Fix for a Real-World Outage Remember when Cloudflare’s dashboard went down last month? It wasn’t a cyberattack — it was a useEffect dependency gone rogue. Here’s the short version: someone added an object to a useEffect dependency array. React, ever observant, treated each new render as a “new object” and kept re-running the effect... endlessly. The result? A self-inflicted DDoS — their frontend bombarded their own backend with API calls. The new useEffectEvent hook prevents exactly this kind of chaos. It cleanly separates event logic from rendering cycles, meaning fewer infinite loops, safer effects, and happier engineers (and APIs). 💡 2. <Activity /> — Hide Without Losing State Finally, a way to hide components without destroying them. <Activity /> lets you toggle visibility while keeping React and DOM state intact. Effects pause in the background, so your app stays efficient and ready to resume instantly. Perfect for tabs, modals, and multitasking UIs. 🎬 3. <ViewTransition /> — Built-In Smoothness Transitions are no longer a design afterthought. <ViewTransition /> introduces native-like view animations and shared element transitions — helping React apps feel polished out of the box, without wrestling with CSS trickery. 🧩 4. Fragment Refs — Clean DOM Control React now lets you reference multiple DOM elements inside a fragment. It’s a small but powerful improvement that makes integrating with low-level APIs and third-party libraries far simpler. No more awkward wrappers or “why is this div even here?” moments. 🧠 5. React Compiler 1.0 & React Foundation React Compiler 1.0: React now automatically optimizes and memoizes your components — no more sprinkling useMemo and useCallback like seasoning on every render. React Foundation: React and React Native now live under an independent, non-profit foundation — ensuring open governance and a healthy, community-driven future. ✨ Why It Matters React 2025 is all about smarter defaults, fewer gotchas, and smoother user experiences. From preventing production meltdowns to simplifying complex UI state, this evolution puts developers back in control — and lets us focus on what actually matters: building great products. Frontend just got a serious upgrade. #ReactConf2025 #ReactJS #Frontend #WebDevelopment #JavaScript #Cloudflare #TechNews #aws

JavaScript Prototypes: The Moment Everything Finally Made Sense 🚀 I spent years writing JavaScript without understanding what was really happening under the hood. 🤔 Then one day, I noticed something that didn't make sense: Why can I call methods on primitive strings when they're not even objects? How does dot notation work on a simple text value? This simple question sent me down a rabbit hole that completely changed how I think about JavaScript. 🤨 Here's what I discovered: ✨ Every object has a hidden __proto__ property that creates inheritance chains ✨ JavaScript temporarily "wraps" primitives to give them object-like behavior ✨ The prototype system is what makes inheritance actually work ✨ Classes are just syntactic sugar over prototypes ✨ Understanding this unlocks why JavaScript behaves the way it does I documented my entire journey - from confusion to clarity - in a detailed article where I: → Experimented with prototype chains → Built real-world examples (API clients, databases) → Solved the primitive methods mystery → Explained __proto__ vs prototype once and for all Whether you're a beginner trying to understand JavaScript or an experienced dev who wants to know what's happening behind the scenes, this deep dive breaks it down step by step. 🔗 Read the full article: https://lnkd.in/g26HR8x7 Have you ever wondered about JavaScript's prototype system? Drop a comment with your biggest "aha!" moment when learning JS internals! 👇 #JavaScript #WebDevelopment #Programming #SoftwareEngineering #WebDev #FrontendDevelopment #LearnToCode #CodeNewbie #TechBlog

I had an argument today on a topic which can be skipped very easily (You don't want to miss reading it) The issue was with understanding the following: ↳ setState() ↳ Mutable & Immutable ↳ Deep and Shallow Copy This looks like an easy concept, but if missed, you will keep scratching your head, or just do vibe coding (which is not recommended) const myInitialState = [ { name: 'name', age: 10 }, { name: 'name1', age: 20 }]; ❌ setState(prevState => prevState.sort((a, b) => a.age - b.age)); ✅ setStatet(prevState => { const sorted = [...prevState]; sorted.sort((a, b) => a.age - b.age)); return sorted; }); Q1. Why does updating the older value doesn't work, and the later works? Q2. Creating a copy via [...prevState] is still a shallow copy, then how does React knows something has changed? Answer 1. The reference matters here. When you change something to the older value, the reference doesn't change, and React thinks, it is still unchanged, hence, no re-render trigger, and no UI updates. Answer 2. Even when you create shallow copy, you are creating a new reference. Creating a new array via "[ ]" → Then shallow copy the items using Spread operator. So the reference of sorted and prevState changes. As soon as React sees that in the return, it triggers re-render, as per "Diffing Algorithm". If you have learnt something new, let your friend learn it too via Repost ♻️ P.S. I have bonus questions in the comment section. Let's check how good do you know React #reactjs #react #javascript #coding #programming #softwareengineering #frontend

If your vibe coding then dont miss this read..... Was vibe coding with a friend yesterday who kept hitting walls with Claude writing React 19 code. Hooks breaking. State management going sideways. The usual chaos. So I told him something that sounded crazy: "Code like it's 2015." We switched to jQuery and vanilla JavaScript. Suddenly? The AI was a completely different beast. Clean code. Fewer hallucinations. Actually worked on first try. Here's what nobody's talking about: LLMs learned from millions of Stack Overflow answers, GitHub repos, and tutorials from the 2010s. There's just MORE training data for older, stable stacks. When you ask it to write React Server Components, it's guessing. When you ask for a jQuery AJAX call? It's SEEN that pattern 10,000 times. And here's the kicker - most enterprises aren't running bleeding-edge frameworks anyway 📊 I've walked through data centers where Angular 1.x is still humming along. Backbone.js powering billion-dollar workflows. These companies aren't behind the times - they're smart. Stability matters more than GitHub stars. The real lesson? When you're vibe coding (prototyping, internal tools, quick MVPs), maybe don't reach for the latest framework. Use what the AI actually knows deeply. Save React/Next/Svelte for when you're architecting something you'll maintain for years. The best tool isn't always the newest tool. Sometimes it's the one with 15 years of battle-tested examples in the training data 💡 What's your take? Are we sleeping on "old" tech for AI-assisted development? #AIcoding #SoftwareDevelopment #EnterpriseIT #TechLeadership #DeveloperTools #LLMs #CodingWithAI #TechStrategy #SoftwareEngineering #DigitalTransformation

🔥 Loop Optimization in JavaScript — Code Smarter, Run Faster (2025 Edition) Loops are the heartbeat of your JavaScript logic and optimizing them can make your entire site feel snappier. Let’s level up your performance game 👇 1️⃣ Stick with the Classic for Loop: It’s old-school but still unbeaten for large datasets. Cache your arr.length and let your loops fly! 2️⃣ Readability Wins Too — Use map(), filter(), reduce(): Not every battle is about speed. These methods make your code clean, modern, and maintainable — perfect for smaller or non-critical processes. 3️⃣ Skip forEach() When Every Millisecond Counts: forEach() looks neat but hides function call overheads. For mission-critical speed, go back to basics. 4️⃣ Flatten Those Nested Loops: Nested iterations are performance black holes. Flatten data structures or rethink your logic to cut unnecessary loops. 5️⃣ Break Big Jobs into Small Wins: Long-running loops freeze the UI. Break them into chunks: function runInSmallBatches(arr, size) { let i = 0; function batch() { const end = Math.min(i + size, arr.length); for (; i < end; i++) {} if (i < arr.length) setTimeout(batch, 0); } batch(); } ⚡ Now your app breathes — smooth, responsive, and lag-free. Benchmark Everything. Don’t just “optimize” — prove it’s faster. Measure before and after. 💬 Final Thought: Write code that’s not just smart — but feels lightning fast. 🚀 #JavaScript #WebPerformance #CodingTips #FrontendDevelopment #SoftwareEngineering #WebOptimization #Programming #CodeBetter #JSPerformance #WebDev #TechTips #CleanCode #DevelopersLife #PerformanceMatters

I just tested 47 different prompts across 6 LLMs using modern vs legacy tech stacks. The results? Honestly shocking 📊 Started this experiment three weeks ago after a CTO told me his team was spending more time debugging AI-generated React code than just writing it themselves. So I built a testing framework: Same functionality across jQuery, Angular 1.x, React 16, React 19, Vue 2, and vanilla JS Tested on GPT-4, Claude, Gemini, and three others Measured: accuracy, first-run success rate, and debugging time What I found broke my assumptions about "modern = better" The older the stack, the cleaner the output. And it's not even close. jQuery had an 89% first-run success rate. React 19? 34%. But here's where it gets interesting - I also mapped this against ACTUAL enterprise tech debt data from 230 Fortune 1000 companies. The correlation is wild. Turns out there's a "sweet spot" year for AI-assisted coding. And it's not what you think. I've packaged this into a one-page framework: the optimal stack selection matrix for AI-assisted development. Shows you exactly when to use what based on project type, timeline, and team makeup. If you want a copy, drop "FRAMEWORK" in the comments and I'll send it over. Curious what year YOU think is the sweet spot for vibe coding? (My money was on 2018. I was wrong.) #AIcoding #CTOInsights #TechLeadership #SoftwareEngineering #EnterpriseIT #DeveloperProductivity #AItools #TechStrategy #DigitalTransformation #Innovation

💡 #Day6Challenge — Deep Dive into Spread, Rest & Reduce in JavaScript After mastering event loops, promises, async/await, closures, and prototypes — today I explored three extremely powerful concepts that make JavaScript cleaner, shorter, and smarter 👇 🚀 1️⃣ Spread Operator (…) Expands arrays and objects into individual elements. Perfect for merging, copying, or passing arguments dynamically. Example: const user = { name: "Rahul" }; const details = { age: 25, city: "Delhi" }; const merged = { ...user, ...details }; 🚀 2️⃣ Rest Operator (…) Collects multiple parameters into a single array — helping write reusable functions. Example: function sum(...nums) { return nums.reduce((a, b) => a + b, 0); } console.log(sum(10, 20, 30)); // 60 🚀 3️⃣ Reduce Method Transforms arrays into single values — sum, average, merge, frequency count — possibilities are endless! Example: const cart = [ { item: "Shirt", price: 800 }, { item: "Jeans", price: 1200 }, { item: "Shoes", price: 1500 } ]; const total = cart.reduce((acc, curr) => acc + curr.price, 0); console.log(total); // 3500 💪 Concepts covered today: ✅ Spread / Rest Operator ✅ Array reduce() – sum, filter, merge, and count ✅ Object merging and destructuring ✅ Practical mini-projects (Cart total, Object merge, Even sum finder) 💬 Next up: Advanced reduce patterns + real-world data transformations before moving into Map, Filter, and Chaining concepts. #JavaScript #Day6Challenge #LearningJourney #WebDevelopment #FrontendDeveloper #100DaysOfCode #JSMastery #CodeEveryday #DeveloperCommunity #RahulLearnsJS

⚛️ React Learning Series – Day 8 Building Reusable Logic with Custom Hooks By now, we’ve explored React’s built-in hooks like useState(), useEffect(), useContext(), and useReducer(). But what if you find yourself using the same logic in multiple components — like fetching data or handling form inputs? That’s where Custom Hooks shine. 🌟 🔹 What Are Custom Hooks? A custom hook is simply a JavaScript function that starts with use and lets you reuse stateful logic. Here’s an example 👇 import { useState, useEffect } from "react"; function useFetch(url) { const [data, setData] = useState(null); useEffect(() => { fetch(url) .then(res => res.json()) .then(setData); }, [url]); return data; } Now you can use it anywhere: const users = useFetch("https://lnkd.in/gNiygD_6"); Just like that — you’ve built a reusable, self-contained logic block! 🔁 🔹 Why It’s Important ✅ Keeps components clean and focused on UI ✅ Makes logic reusable and easier to maintain ✅ Improves readability by hiding repetitive code ✅ Encourages modular architecture in large apps In short — custom hooks = cleaner code, less repetition, and smarter reusability. #ReactJS #WebDevelopment #Frontend #JavaScript #ReactHooks #CustomHooks #CleanCode #LearnToCode #SoftwareEngineering #TechCommunity #ProgrammingLife

⚛️ React Learning Series – Day 8 Building Reusable Logic with Custom Hooks By now, we’ve explored React’s built-in hooks like useState(), useEffect(), useContext(), and useReducer(). But what if you find yourself using the same logic in multiple components — like fetching data or handling form inputs? That’s where Custom Hooks shine. 🌟 🔹 What Are Custom Hooks? A custom hook is simply a JavaScript function that starts with use and lets you reuse stateful logic. Here’s an example 👇 import { useState, useEffect } from "react"; function useFetch(url) { const [data, setData] = useState(null); useEffect(() => { fetch(url) .then(res => res.json()) .then(setData); }, [url]); return data; } Now you can use it anywhere: const users = useFetch("https://lnkd.in/gNiygD_6"); Just like that — you’ve built a reusable, self-contained logic block! 🔁 🔹 Why It’s Important ✅ Keeps components clean and focused on UI ✅ Makes logic reusable and easier to maintain ✅ Improves readability by hiding repetitive code ✅ Encourages modular architecture in large apps In short — custom hooks = cleaner code, less repetition, and smarter reusability. #ReactJS #WebDevelopment #Frontend #JavaScript #ReactHooks #CustomHooks #CleanCode #LearnToCode #SoftwareEngineering #TechCommunity #ProgrammingLife