Temporal API: Native Support Arrives in Chrome 144

If you work with JavaScript long enough, you’ll eventually run into situations where a function gets called way too many times. Think about typing in a search bar, scrolling a page, or resizing a browser window. These events fire continuously, and if we trigger heavy logic every single time, the app can become slow pretty quickly. This is where debouncing and throttling come in. Debouncing waits for the user to finish doing something before running the function. A simple example is a search bar. Imagine an API call running on every keystroke while someone types “javascript”. That’s 10 API calls when we really only need one. With debouncing, the function runs only after the user stops typing for a short delay. So instead of triggering the search repeatedly, it waits until the typing pauses. Throttling works a little differently. It makes sure a function runs at most once in a fixed time interval, no matter how many times the event fires. Scrolling is a good example. When a user scrolls, the event can fire dozens of times per second. Throttling limits how often the logic runs, like once every 200ms, which keeps the UI responsive without overwhelming the browser. In simple terms: Debounce → run after the activity stops Throttle → run at regular intervals during the activity Both are small techniques, but they make a big difference when it comes to performance and user experience. #javascript #webdevelopment #frontenddevelopment #fullstackdeveloper #reactjs #devcommunity #programming

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

Most JavaScript “magic” is just the prototype chain doing its job. 🧠🔍 When you access obj.foo, the engine doesn’t only check obj. It walks: obj → obj.__proto__ → … until it finds foo or hits null. That lookup is why “inheritance” in JS is really delegation. A few internals worth remembering: • Property reads traverse the chain; writes don’t. obj.foo = 1 creates/overwrites an own property, even if foo exists on the prototype. ✍️ • Methods on prototypes share one function instance across many objects (memory win vs per-instance methods). ⚙️ • Shadowing is a common perf + debugging trap: a hot path accidentally creates own props and changes shapes/hidden classes. 🧩 • Object.create(null) gives you a truly “dictionary” object with no inherited keys—useful for maps and security-sensitive parsing. 🔒 Real-world payoff: In React/Next.js apps and Node.js services, understanding prototype lookup helps you debug “why is this method missing?”, avoid prototype pollution pitfalls, and reason about perf in high-throughput APIs. 🚀 Next time a bug feels spooky, inspect the chain. 🕵️ #javascript #nodejs #frontend #webperformance #security

JavaScript: Loved. Hated. Still Running the World. “This is my favorite language.” 👉🏻 points at JavaScript Then reality appears: "11" + 1 = "111" "11" - 1 = 10 Welcome to type coercion. Confusing at first. Powerful once you understand it. And somehow… always part of the debate. This is why JavaScript sparks endless arguments: • It’s incredibly flexible • It can feel unpredictable • And it’s absolutely everywhere From React, Angular, and Vue.js on the frontend… To Node.js on the backend… To mobile and desktop apps… JavaScript isn’t just a language anymore. It’s an ecosystem. But here’s the real takeaway 👇🏻 The lesson isn’t: “JavaScript is bad.” The lesson is: Every language has quirks. Strong developers don’t complain about them. They learn how they work and write better code because of it. What actually makes you professional? • Understanding why behavior happens • Writing clean, predictable logic • Knowing when a language is the right tool and when it’s not • Mastering fundamentals: types, scope, execution context Memes make us laugh. Understanding makes us better engineers. JavaScript doesn’t make developers weak. Not understanding it does. What’s the most confusing JavaScript behavior you’ve faced? RRK signing off! #FullStackDeveloper #WebDevelopment #JavaScript #BuildInPublic #LearningInPublic #CareerGrowth

A very common React mistake I see developers make: Mutating State When I was learning React, one concept that changed the way I write code was this rule: 👉 React state must never be mutated.its always immutable. But why? React does not deeply compare objects or arrays when state updates. Instead, it performs a reference(memory) comparison. That means React checks: Old State === New State ? If the reference is the same, React assumes nothing changed and skips re-rendering. Example of a mistake: cart.push(product) // ❌ Mutating state setCart(cart) Here we modified the same array in memory, so React may not detect the change because the memory location is same.so no re-render..no UI update. The correct approach is immutability: setCart([...cart, product]) // ✅ Creating a new array Now React sees a new reference, triggers reconciliation, and updates the UI correctly. 💡 Why React prefers immutability: • Faster change detection • Predictable state updates • Easier debugging • Better performance This small concept explains why patterns like: map() filter() spread operator (...) are used so frequently in React. because all this returns new object or array... Understanding this helped me write cleaner and more reliable React components. What React concept took you the longest to understand? 🤔 #React #Frontend #JavaScript #WebDevelopment #ReactJS

🚀 JavaScript is finally addressing a 30-year-old problem. For decades, JavaScript’s Date object has been one of its most confusing and error-prone features. I’ve personally faced these issues multiple times while working with dates in JS: 👉 Same date string behaving differently across browsers 👉 Timezone bugs that only show up in production 👉 Unexpected mutations breaking logic 👉 And yes… months starting from 0 😅 💡 Introducing: Temporal API JavaScript is moving towards a modern date/time system designed to solve these long-standing issues. ✨ What makes Temporal better? ✔️ Immutable by default (no more accidental changes) ✔️ Clear separation of concerns (Date, Time, Timezone handled properly) ✔️ Consistent parsing across environments ✔️ First-class timezone support 🌍 ✔️ Cleaner and more readable date operations Example: Instead of: new Date() (unpredictable, mutable) We now have: Temporal.PlainDate, Temporal.PlainTime, Temporal.ZonedDateTime, and more — each with a clear purpose. 📌 Why this matters: Date bugs are among the hardest to detect and debug in real-world applications. While this is already improving things in some cases, it’s still evolving and not fully resolved everywhere yet — hoping to see complete adoption soon. 💬 Have you encountered challenges while working with dates in JavaScript? #JavaScript #WebDevelopment #Frontend #Programming #SoftwareEngineering #TemporalAPI

JavaScript events like scroll, resize, and typing can fire hundreds of times per second. If we run heavy functions on every event, the app can become slow and inefficient. Two common solutions to control this are: Debounce and Throttle Debounce Runs the function only after the event stops firing for a specific time. Example: Search input autocomplete. Throttle Runs the function at most once in a fixed time interval, even if the event keeps firing. Example: Scroll event handling. Quick difference: Debounce → waits for user inactivity Throttle → limits how often a function can run Using these techniques improves performance, user experience, and efficiency in real-world applications. Follow for more JavaScript concepts explained visually. 🚀 #javascript #webdevelopment #frontenddeveloper #coding #softwareengineering

Blog 03 of my JS Unlocked series is live! 🚀 Control Flow in JavaScript: If, Else, and Switch Explained 👇 Every app makes decisions — show this page or that one, allow access or block it. That decision-making power in code is called control flow. In this one I cover: ✅ What control flow actually means ✅ if, if-else, and else if ladder with real examples ✅ switch statement — and why break matters ✅ When to use switch vs if-else (with a clear comparison) ✅ Hands-on challenge at the end Would love your feedback if you read it 🙏 🔗 https://lnkd.in/dSXtQpfS Thanks to #HiteshChoudhary Sir, #PiyushGarg💛 #JavaScript #WebDevelopment #Hashnode #WebDevCohort2026 #LearningInPublic #Frontend #JS

A small concept that confuses many developers: CORS. Almost every developer has seen this error at some point: “Blocked by CORS policy.” When I first encountered it, it looked like something was broken in my code. But in reality, it’s the browser protecting users. The key idea behind CORS is Origin. Origin is made of three parts: • Protocol (HTTP / HTTPS) • Domain • Port If any of these change, the browser treats the request as coming from a different origin. Example: Frontend https://facebook.com:3000 Backend API https://lnkd.in/g2FwCsEk Even though they look related, the browser sees them as different origins. So when the frontend sends a request, the browser automatically includes a header like: Origin: https://facebook.com Now the server has to explicitly allow it by sending: Access-Control-Allow-Origin If the server allows it, the browser delivers the response. If not, the browser blocks it and throws the famous CORS policy error. I created a simple diagram to visualize how this interaction actually works between the browser and the server. Understanding this makes debugging frontend-backend communication much easier. Curious to know: When did you first encounter a CORS error in your projects? Sheryians Coding School Anshu Pandey Ritik Rajput Daneshwar Verma Ankur Prajapati #webdevelopment #javascript #nodejs #backend #frontend #cors

⚛️ Improving React Performance with Lazy Loading As React applications grow, the bundle size can increase significantly. Loading all components at once can slow down the initial page load and impact the user experience. React Lazy Loading helps solve this problem by loading components only when they are needed, instead of including everything in the main JavaScript bundle. With tools like "React.lazy()" and "Suspense", React can split the code and dynamically load components when a user navigates to them. Benefits of React Lazy Loading: • Smaller initial bundle size • Faster page load • Better performance on slower networks • Improved overall user experience Optimizing how and when components load is a key step in building scalable and high-performance React applications. Reference from 👉 Sheryians Coding School #React #WebDevelopment #Frontend #JavaScript #Performance #SoftwareEngineering