How to understand the Node.js event loop with a mnemonic

👋 Hey devs! I’ve been exploring different JavaScript runtime environments, and I wanted to share something interesting, A quick real-world performance test involving file I/O We often hear about: Node.js – reliable, huge ecosystem Deno – secure, modern, TypeScript-first Bun – blazing fast, all-in-one toolkit But what happens when we put them to the test? So I ran a simple benchmark: Write a 100MB file → then read it → measure the time And the result? Bun is currently the fastest JavaScript runtime #JavaScript #Nodejs #Deno #Bun #WebDevelopment #Performance #CodingTips

⚙️ Mastering Async Handling in Node.js One of the biggest strengths of Node.js is its asynchronous, non-blocking nature — but it’s also where many developers hit roadblocks. Understanding how the event loop, callbacks, promises, and async/await work together is key to writing clean, efficient code. The magic happens when you stop fighting async behavior and start designing around it. A few tips that helped me: ✅ Use async/await for clarity, but don’t forget proper error handling. ✅ Leverage Promise.all() when tasks can run in parallel. ✅ Avoid blocking the event loop — use worker threads or queues for CPU-heavy work. Once you truly get async handling, Node.js feels less like a challenge and more like a superpower. 💪 #NodeJS #JavaScript #AsyncProgramming #BackendDevelopment #SoftwareEngineering #EventLoop #Promises #WebDevelopment #FullStack #cfbr

Deno stands out from other JavaScript runtimes because it gives developers everything they need out of the box from a bundler, builder, and TypeScript support to built-in linting and formatting tools. You don’t need to install countless external packages or configure complex setups; Deno’s philosophy is about simplicity, SECURITY, and productivity. With the introduction of JSR, Deno is also redefining the JavaScript package ecosystem offering a faster, modern alternative to npm that’s deeply integrated with TypeScript and Deno’s native tooling. Recently, I had the chance to contribute directly to the runtime by implementing the sqlite.backup capability for the Node compatibility layer. After weeks of discussion, review, and iteration with the Deno core team, the PR was finally merged. Deno: https://lnkd.in/dNGHgpZH JSR: https://jsr.io/ sqlite.backup PR: https://lnkd.in/dvYz9iP5

One of the best books for understanding the React.js ecosystem is "React in Depth" by Manning Publications. I highly recommend giving it a read, no matter your level, beginner or advanced, you’ll find a lot of valuable insights and practical lessons inside. - A complete roadmap through the modern React ecosystem, from TypeScript and state management to testing and frameworks like Remix & Next.js. - Deep dives into advanced component patterns, Provider, Composite, and Summary patterns for scalable architecture. - Practical performance optimization techniques and debugging strategies using real-world examples. - Covers CSS-in-JS, React Testing Library, TanStack Query, Redux Toolkit, and more. #ReactJS #ReactDevelopment #FrontendDevelopment #WebDevelopment #JavaScript #TypeScript #ReactEcosystem #ReactCommunity

🧭 Ever clicked a button in React and somehow triggered everything around it too? I once ran into that exact scenario while working on a project — clicking “Delete” would also open the entire card’s detail view. A perfect example of event bubbling in action. It was one of those moments that remind you how powerful — and sometimes tricky — DOM event propagation can be. A single line of code, event.stopPropagation(), instantly fixed the issue and reinforced an important lesson about how events flow through React components. 💡 Check out the code example below 👇 (It’s a simple React snippet that solved the conflict.) 👉 Dive deeper into the full story on Medium: https://lnkd.in/gPTCbKbp #React #ReactJS #JavaScript #FrontendDevelopment #FrontendDeveloper #WebDevelopment #WebDev #Debugging #ProgrammingTips #CodingTips #SoftwareEngineering #DeveloperCommunity

💡 From Vanilla JS → React → Redux Toolkit: Full Circle Moment This week I have been exploring Redux Toolkit and had a fun realisation. In React, we never mutate state and always return new objects with useState. Then with Redux Toolkit, I wrote this: state.push(action.payload) …and it just worked. Why? Immer handles immutability under the hood. It lets us write “mutating” code while keeping state updates safe and predictable. Feels like a full circle: from mutating in vanilla JS → immutable in React → “mutating safely” in Redux Toolkit. ✅ Lesson: Redux Toolkit makes state management clean, simple, and safe. #React #ReduxToolkit #JavaScript #WebDev #StateManagement

Ever feel lost in the NODE.JS EVENT LOOP? 🤯 It's the HEARTBEAT of Node, and understanding it is CRITICAL for performance. Here are 3 MUST-KNOW tips: ✔️ Know the phases: Timer, Pending Callbacks, Idle/Prepare, Poll, Check, Close Callbacks. ⏱️ `setImmediate` executes AFTER the Poll phase; `setTimeout(0)` might execute earlier, during the Poll. 🧵 Avoid BLOCKING operations in the event loop! Use non-blocking I/O or offload tasks to the thread pool (UV_THREADPOOL_SIZE). What's YOUR favorite Node.js optimization trick? Share below! 👇 #Nodejs #Javascript #EventLoop #Async #Backend #Performance #WebDev

⚡ Async Thinking in Node.js Working with Node.js teaches you one thing early, everything is happening at once. The event loop, callbacks, and promises all play a part in making Node.js highly efficient, but also tricky if you don’t handle async logic right. I’ve seen APIs slow down or even hang just because one function blocked the loop. The key isn’t to avoid async, it’s to embrace it: 🔹 Use async/await to keep code readable. 🔹 Run tasks in parallel with Promise.all(). 🔹 Offload heavy computation to worker threads. Once you start thinking asynchronously, Node.js becomes less of a runtime, and more of a flow you can control. #NodeJS #JavaScript #AsyncProgramming #EventLoop #BackendDevelopment #SoftwareEngineering #Performance #FullStack #cfbr #web3

🎉 Excited to share that I recently published my npm package — time-helper-js 🕒 💡 What it does: Working with date and time differences in JavaScript can get messy — so I built a lightweight utility that helps you easily format, compare, and manipulate times with just a few lines of code. 📦 Install it in seconds: npm i time-helper-js 🧠 Key Features: ✅ Simple APIs for date/time formatting ✅ Human-readable time differences ✅ Lightweight & dependency-free 👉 Try it out on npm: 🔗 https://lnkd.in/gs9SXb8M Built with Node.js and TypeScript. #npm #javascript #opensource #webdevelopment #react #nodejs #developer