New Node.js Features: Auto Reload, TypeScript, SQLite, and More

🎯 Backend Journey – Part 3: EJS (Embedded JavaScript Templates) After learning Node.js and Express.js, I moved to the next important part of backend development — EJS. EJS makes it super easy to create dynamic web pages using plain JavaScript inside HTML. Here’s what I explored 👇 • What EJS is and how it works with Express • Setting up a project with npm init -y, installing express and ejs • Creating a default views directory and rendering pages using res.render() • Setting custom views path using path.join(__dirname, "/views") • Learning about interpolation and different EJS tags like <% %>, <%= %>, <%- %> etc. • Working with external data files such as data.json • Serving static files using app.use(express.static()) • Using includes like <%- include("includes/head.ejs") %> for reusable components It’s really interesting to see how front-end templates and back-end logic connect together through EJS. Next, I’ll be learning about REST APIs, CRUD operations, and connecting everything with a database. 🚀 #EJS #Expressjs #Nodejs #Backend #WebDevelopment #FullStack #JavaScript #CodingJourney #Developers #Learning

💻 𝐖𝐡𝐲 𝐝𝐨𝐞𝐬 𝐞𝐯𝐞𝐫𝐲𝐨𝐧𝐞 𝐮𝐬𝐞 𝘭𝘰𝘤𝘢𝘭𝘩𝘰𝘴𝘵:3000? Ever wondered why 𝘦𝘷𝘦𝘳𝘺 tutorial, project, and developer* seems to spin up their app on port 3000? 🤔 Let’s rewind a bit 👇 When Node.js came into the scene, developers started using frameworks like 𝐄𝐱𝐩𝐫𝐞𝐬𝐬 and later 𝐑𝐞𝐚𝐜𝐭. By default: • 𝐄𝐱𝐩𝐫𝐞𝐬𝐬 examples used port 3000 in docs 🧩 • 𝐑𝐞𝐚𝐜𝐭 (𝐜𝐫𝐞𝐚𝐭𝐞-𝐫𝐞𝐚𝐜𝐭-𝐚𝐩𝐩) also picked 3000 as its default dev server port ⚙️ • So it became the 𝘥𝘦 𝘧𝘢𝘤𝘵𝘰 “developer port” — simple, round, and always free. Other popular ones: • 8080 → for backend servers (used by Java/Apache) • 5000 → Flask (Python) • 5173 → Vite 🚀 • 4200 → Angular • 5500 → Live Server (VS Code) So, localhost:3000 became the 𝐡𝐨𝐦𝐞 𝐚𝐝𝐝𝐫𝐞𝐬𝐬 𝐨𝐟 𝐦𝐨𝐝𝐞𝐫𝐧 𝐰𝐞𝐛 𝐝𝐞𝐯𝐬 — a little piece of history that stuck around because it “just works.” 🧠 Fun fact: Ports range from 0–65535. Only ports below 1024 need admin rights — that’s why we start from 3000+! Next time you hit 𝘭𝘰𝘤𝘢𝘭𝘩𝘰𝘴𝘵:3000, you’re opening a small window into web dev history 👩💻👨💻 — 𝐏𝐚𝐯𝐢𝐭𝐡𝐫𝐚 𝐒𝐡𝐚𝐫𝐦𝐚 ✨ #WebDevelopment #NodeJS #ReactJS #DeveloperLife #LearnInPublic #MERN #Frontend

Today, I explored one of the most powerful concepts in Node.js — Modules. Modules allow us to organize our code, keep it clean, and make it reusable across projects. There are three main types of modules in Node.js: 🧩 Core Modules – Built-in modules like fs, http, path. 📦 Local Modules – Custom modules we create in our project. 🌐 Third-Party Modules – Installed using npm (like express, mongoose). Here’s the mindset I’m building: “Don’t repeat code — organize and reuse it effectively.” Understanding modules is the first step toward building scalable and maintainable backend applications. 💬 Question for you: Which Node.js module do you find most useful in your projects? #NodeJS #MERNStack #JavaScript #WebDevelopment #CodingJourney #100DaysOfCode

🚀 Understanding Callbacks in Node.js Have you ever noticed that some tasks in Node.js, like reading files or calling APIs, don’t block other code from running? 🤔 That’s where callbacks come in. A callback is simply a function passed as an argument to another function, which gets executed once a task is complete. It’s the foundation of asynchronous programming in Node.js — allowing your app to continue executing without waiting. For example, when you read a file, Node.js doesn’t stop everything until the file is ready; it continues other work and runs the callback when the data arrives. This makes Node.js fast and efficient for I/O-heavy operations. However, using too many nested callbacks can lead to callback hell, which is why developers now prefer Promises and Async/Await for cleaner, more readable code. ⚡ 💭 What’s your go-to way of handling async tasks — sticking with callbacks or moving to Promises? #NodeJS #JavaScript #BackendDevelopment #WebDevelopment #AsyncProgramming #Learning

#Day2 | Node.js Deep Dive | Module System ExplainedToday, I explored the NodeJS GitHub repo and unlocked how modules actually work behind the scenes – thanks to Akshay Saini sir’s amazing course! 🔍 Key Takeaways: Every module’s code in Node.js runs inside its own function scope using an Immediately Invoked Function Expression (IIFE), just like how function scopes work in JavaScript. This keeps variables & functions private to the module! To share code between files, Node.js gives us the module.exports object inside every module. Export what you want, and access it via require() in other files. require() process: Resolves the path Loads & wraps code in IIFE Evaluates & sets up module.exports Caches the result for best performance! Thanks to this process, we avoid global variable pollution and keep code modular, efficient & easy to maintain. Understanding these fundamentals is crucial for building scalable Node.js apps. Thank you, Akshay Saini, for making complex concepts so clear! #Nodejs #JavaScript #Backend #LearningJourney #100DaysOfCode #Modules #Scope #AkshaySaini

Node.js vs Express.js — What’s the Real Difference (with Code Examples) When I started learning backend, I was super confused 😅 👉 Is Express same as Node.js? 👉 Do I need both? 👉 Why everyone uses Express if Node.js already works? Here’s the simple truth 👇 🟩 Node.js — It’s like the engine ⚙️ that powers your server. You can run JavaScript outside the browser and build everything from scratch — but it’s a bit long. 🟨 Express.js — It’s like a car 🚗 built using the Node.js engine. It gives structure, speed, and comfort — you can build APIs or apps easily. Check the code below 👇 I built both servers — one using pure Node.js and another using Express.js. You’ll instantly see how much cleaner Express makes your backend code! 💡 In short: Node.js gives you the base. Express gives you the wings. 🕊️ #Nodejs #Expressjs #BackendDevelopment #WebDevelopment #Developers #LearningJourney #CodingCommunity #JavaScript #CodeExamples #LearnBackend #JavaScript #LearnCoding #CodeNewbie #TechLearning

🧠 React + TypeScript: 6 Best Practices You Should Follow in 2025 TypeScript isn’t just a “nice-to-have” — it’s your safety net ⚡ Here’s how to make the most of it with React 👇 1️⃣ Type your Props and State properly Don’t leave things as any. Use interfaces or type aliases for clarity: interface UserProps { name: string; age?: number; } 2️⃣ Leverage React.FC wisely Use it only when you need children — otherwise, define function components normally. 3️⃣ Use Enums or Union Types instead of Strings They help avoid typos and make your code self-documented: type Status = "loading" | "success" | "error"; 4️⃣ Infer types from data when possible Don’t over-type — let TypeScript do the work. Example: const user = useState({ name: "", age: 0 }); // TypeScript infers type automatically 5️⃣ Always type your custom hooks When you return complex data, define what’s coming back. It makes your hooks reusable and predictable. 6️⃣ Enable strict mode in tsconfig.json Yeah, it complains a lot… but it catches bugs before your users do. 🚀 Clean + Typed + Organized = Frontend Peace of Mind. 💬 What’s one TypeScript habit that changed the way you code in React? #React #TypeScript #Frontend #WebDevelopment #CleanCode #BestPractices #JavaScript

JavaScript vs Node.js — The Confusion That Trips Up Many Developers Most Devs say they “code in Node.js,” but here’s the truth: Node.js isn’t a language — it’s a runtime. JavaScript is the language. Node.js just lets it live outside the browser. This small detail changes everything — how you handle callbacks, import modules, and even tune performance. Quick breakdown: JavaScript = syntax + core APIs (ECMAScript) Node.js = runtime with file system, network, and process access Browser JS = DOM, window, fetch Node.js = fs, process, cluster Mixing them up leads to those classic errors: “document is not defined” So next time you start a project, ask yourself: 👉 Do I need browser features like the DOM? 👉 Or backend power like file access and clustering? Understanding this split helps you write cleaner, faster, and more scalable apps. What’s the biggest “aha” moment you’ve had while working with Node.js or JavaScript? Share below 👇

⚡ The moment Node.js finally clicked for me For a long time, I used Node.js just because “everyone else did.” But it wasn’t until I started building APIs and experimenting with async logic that I realised why Node is so powerful. It’s not just JavaScript on the backend — it’s the event loop, non-blocking I/O, and the ability to handle thousands of concurrent requests without threads getting messy. The real magic? When you understand how the call stack, callback queue, and promises interact — suddenly performance issues, “await hell,” and weird bugs make complete sense. If you’re learning Node, here’s my advice: 🔹 Don’t rush frameworks like Express — first, understand how a simple HTTP server works. 🔹 Use console.log() to trace event loop behaviour. 🔹 Then add one concept at a time (middleware, routing, async DB calls). Once you get that foundation, scaling to real-world apps feels natural. What was the “aha moment” for you in backend dev? #NodeJS #BackendDevelopment #JavaScript #LearningInPublic #WebDev

Is Node.js really single-threaded? The truth: Node.js executes JavaScript code in a single thread, that’s why we call it single-threaded. But... Behind the scenes, Node.js uses libuv, a C library that manages a pool of threads for heavy I/O tasks like file access, DNS lookups, or database calls. So while your JS code runs in one thread, the background work can happen in parallel. That’s how Node.js achieves non-blocking, asynchronous I/O. Then why is it still called single-threaded? Because from a developer’s perspective, you write code as if it runs in one thread, no locks, no race conditions, no complex synchronization. The multi-threading happens behind the curtain. But what if we actually need multiple threads? Node.js has Worker Threads, they let us use additional threads for CPU-heavy tasks (like data processing or encryption) while keeping the main event loop free. So, Node.js can go multi-threaded, when you really need it. Why choose Node.js? Perfect for I/O-intensive apps (APIs, real-time chats, streaming). Handles concurrency efficiently with fewer resources. Simple codebase, no need to manage threads manually. Great for scalable network applications. In short: Node.js is “single-threaded” by design, but “multi-threaded” when it matters. #NodeJS #JavaScript #V8 #BackendDevelopment #WebDevelopment #Programming