Learning Node.js Internals with V8 Engine and C++ Bindings

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? "Object.freeze()" makes an object 𝗶𝗺𝗺𝘂𝘁𝗮𝗯𝗹𝗲 — but only at the top level. That means: - You 𝗰𝗮𝗻𝗻𝗼𝘁 𝗮𝗱𝗱, 𝗿𝗲𝗺𝗼𝘃𝗲, 𝗼𝗿 𝗰𝗵𝗮𝗻𝗴𝗲 properties on the frozen object - But 𝗻𝗲𝘀𝘁𝗲𝗱 𝗼𝗯𝗷𝗲𝗰𝘁𝘀 𝗰𝗮𝗻 𝘀𝘁𝗶𝗹𝗹 𝗯𝗲 𝗺𝗼𝗱𝗶𝗳𝗶𝗲𝗱 🔧 𝗜𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁: If you need full immutability, you’ll need a 𝗱𝗲𝗲𝗽 𝗳𝗿𝗲𝗲𝘇𝗲 (or use libraries like Immer). Shallow vs deep immutability — a small detail that can cause big bugs. #JavaScript #FrontendDevelopment #WebDevelopment #SoftwareEngineering #CodingTips #CleanCode #BestPractices #FullstackDeveloper

🚀 Day 955 of #1000DaysOfCode ✨ How JavaScript Event Loop Works Behind the Curtains JavaScript looks simple on the surface — but under the hood, a lot is happening to make async code work smoothly. In today’s post, I’ve explained how the JavaScript Event Loop actually works behind the scenes, so you can understand how tasks are executed, queued, and prioritized. From the call stack to the callback queue and microtask queue, this concept explains why some functions run before others — even when the code looks sequential. Understanding the event loop helps you debug tricky async issues, avoid unexpected behavior, and write more predictable code. If you’re working with promises, async/await, or APIs, this is one of those concepts you must truly understand. 👇 What part of the event loop confuses you the most — call stack, microtasks, or callbacks? #Day955 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #React #CodingCommunity #AsyncJavaScript

🚀 Day 944 of #1000DaysOfCode ✨ Understanding Temporal Dead Zone in JavaScript JavaScript can sometimes behave in unexpected ways — especially when it comes to variable declarations. In today’s post, I’ve explained the concept of the Temporal Dead Zone (TDZ) in a simple and practical way, so you can understand why accessing variables before declaration can throw errors. The TDZ is the time between when a variable is hoisted and when it is actually initialized. This is why variables declared with `let` and `const` behave differently compared to `var`. Understanding this concept helps you avoid tricky bugs and write more predictable and cleaner code. If you’re working with modern JavaScript, knowing how TDZ works is essential for debugging and writing reliable applications. 👇 Have you ever faced a TDZ-related error without knowing the reason? #Day944 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #React #Next #CodingCommunity #AsyncJavaScript

🚀 Promises in JavaScript — Simplified Handling asynchronous operations in JavaScript can get messy… especially with callback hell. That’s where Promises come in. 👉 A Promise is an object that represents a future value — something that will be available after an async operation completes. It has 3 states: 1️⃣ Pending → Initial state (waiting) 2️⃣ Fulfilled → Operation successful 3️⃣ Rejected → Operation failed 💡 Promises make async code cleaner, readable, and easier to manage compared to callbacks. Mastering this is a must for every JavaScript developer 💯 #JavaScript #WebDevelopment #FrontendDevelopment #AsyncProgramming #Coding

Most people think they understand JavaScript classes. They don’t. Because JavaScript doesn’t even have real classes. What it actually has is prototypes — and classes are just syntactic sugar on top of them. Today in my T9 class, this completely changed how I look at JS: → Prototype-based inheritance (the actual mechanism) → Traditional vs Modern prototype handling → Constructor Functions (how things worked before classes) Then we moved to what most people are comfortable with: → Classes in JavaScript → constructor, extends, super, static → The 4 pillars of OOP: Encapsulation Inheritance Polymorphism Abstraction But here’s the uncomfortable truth: If you don’t understand prototypes, you don’t actually understand inheritance in JavaScript. You’re just memorizing syntax. That’s why debugging feels random. That’s why “this” behaves weird. That’s why things break in unexpected ways. Now it makes sense. Still early in the journey — but this was one of those “everything clicks” moments. Do you think JS should have stayed purely prototype-based, or are classes a good abstraction? #JavaScript #OOPS #WebDevelopment #LearningInPublic Thankyou Chai Aur Code Suraj Kumar Jha Sir Hitesh Choudhary Sir Piyush Garg Sir

Day 14 #100DaysOfCode 💻 Today I learned Promise & Async/Await in JavaScript. Promise helps handle asynchronous operations like API calls. Async/Await makes code cleaner and easier to read. Example: function getData() { return new Promise((resolve) => { setTimeout(() => { resolve("Data received"); }, 1000); }); } async function fetchData() { const result = await getData(); console.log(result); } fetchData(); Now I can handle async code without messy callbacks 🚀 #JavaScript #AsyncAwait #Promise #WebDevelopment #CodingJourney #Akbiplob

TypeScript 6.0 is your final warning TypeScript 6.0 has been released as the last version built on its JavaScript codebase, serving as a transition before TypeScript 7.0 introduces a Go-based compiler with native speed and multi-threaded type checking. Key changes include strict mode enabled by default, module defaulting to esnext, target floating to the current ES spec (es2025), and types defaulting to an empty array — a change that may break many projects but promises 20–50% speed improvements. New features include built-in Temporal API types and Map.getOrInsert support. Several legacy options like outFile, baseUrl, and AMD/UMD/SystemJS targets are deprecated or removed. The newsletter also covers pnpm 11 beta, Zero 1.0 stable release, a React useState closure gotcha, and various other JavaScript ecosystem links

hi connections Day 16 of 30: Implementing a Promise Time Limit! Moving deeper into the Asynchronous section of my 30 Days of JavaScript on LeetCode. Today was about adding a "safety net" to our code. 🛠️⏳ The Goal: Wrap an async function so that if it takes longer than a specified time t, it immediately fails with a "Time Limit Exceeded" error. The Lesson: I used Promise.race() to pit the actual function against a custom timeout promise. This pattern is crucial for building resilient systems. Whether it's a web crawler or a high-traffic API, you never want one slow request to block your entire event loop. Control the time, control the performance! 💻🔥 #JavaScript #WebDevelopment #CodingChallenge #LeetCode #Day16 #SoftwareEngineering #AsyncJS #PerformanceOptimization

🚀 JavaScript Fundamentals Series — Part 8 Objects are one of the most important concepts in JavaScript. Almost everything in JavaScript is built around objects. This guide covers: • What objects really are • Properties and methods • How JavaScript structures data • Why objects are everywhere in JS If you want to truly understand JavaScript, you must understand objects. Full guide 👇 https://lnkd.in/dGHh7weZ #javascript #coding #webdev

[Article] Ever wondered what actually #TypeScript do. It's not just adding types & stripping them away! It's a sophisticated 5-stage pipeline: 1️⃣ 𝐋𝐞𝐱𝐞𝐫: Turns raw code into meaning full "Tokens" 2️⃣ 𝐏𝐚𝐫𝐬𝐞𝐫: Organizes those tokens into an Abstract Syntax Tree (AST) 3️⃣ 𝐁𝐢𝐧𝐝𝐞𝐫: Creates Symbol Table to manage scopes 4️⃣ 𝐂𝐡𝐞𝐜𝐤𝐞𝐫 (𝐓𝐡𝐞 𝐁𝐫𝐚𝐢𝐧): This is where type validation and inference happens. 5️⃣ 𝐄𝐦𝐢𝐭𝐭𝐞𝐫 (𝐉𝐒): Transform TypeScript code into JavaScript code. Read TS internals:- https://lnkd.in/g7NMPD-9 Grateful to • Hitesh Choudhary • Piyush Garg • Akash Kadlag • Nikhil Rathore • Jay Kadlag • Anirudh Jwala • Suraj Kumar Jha • Chai Aur Code for the guidance. #TypeScript #SoftwareEngineering #WebDevelopment #JavaScript #Compiler #ProgrammingTips #StackAtlas #NodeJs #LearnInPublic #cohort26 #ChaiCode #ChaiAurCode