How to use fs.promises for asynchronous file operations in Node.js

➧Unresolved Promises " The Hidden Cause Behind Slow API Responses " Today, I worked on a problem where an API response was unexpectedly slow. After tracing through the code, I found that the issue wasn’t related to the database or server load it was a simple Promise that wasn’t resolving properly. Inside the asynchronous route, a setTimeout function was used, but the Promise was only resolved inside that timeout. This caused the entire API execution to wait until the timeout finished, delaying the response unnecessarily. This small oversight highlighted a crucial lesson: when a Promise is not resolved immediately or has its resolution tied to a delayed operation, it can significantly increase API response time. Even a few seconds of delay can make a major difference in performance-sensitive systems. ▸ Always ensure Promises are resolved or rejected as soon as the asynchronous task is completed. ▸ Avoid unnecessary delays within async functions. ▸ Continuously monitor and profile your API performance to catch such bottlenecks early. Unresolved or delayed Promises might seem minor, but they can silently degrade performance. #Nodejs #Expressjs #JavaScript #MERN #FullStackDevelopment #WebPerformance #BackendDevelopment #APIOptimization #WebDevelopment #AsyncProgramming #SoftwareEngineering

🚀 New Video in the Express.js Series! Just uploaded Part 4 of my Express.js From Scratch – Step by Step series 🎥 This time, I’ve explained one of the most fundamental concepts in backend development — What is an API? In this video, I break down APIs in the simplest way possible, with clear real-world examples and a quick demo in Express.js. 🎯 Watch here: https://lnkd.in/gZMzgAZf #API #Expressjs #Nodejs #WebDevelopment #BackendDevelopment #Coding #Learning #CodingMeAaja #JavaScript #SoftwareEngineering

🚀 Introducing rest-setup — A Streamlined REST API Boilerplate for Node.js Developers I built and published rest-setup — a production-minded npm boilerplate that removes repetitive backend setup so teams and solo devs can focus on business logic from day one. NPM: 👉 https://lnkd.in/g9AWNe5a # create new setup npx rest-setup my-api # Or initialize in current directory npx rest-setup . Check the code: 👉 https://lnkd.in/gmMx3i55 consider a start ⭐ on the repo Key features: ⚙️ Modular Express structure with clear separation of concerns 🔐 Environment-driven configuration (12-factor friendly) 🧩 Unified error handling & consistent response format 🔒 Middleware-ready slices for auth, validation, logging ☁️ Cloudinary integration for file/media management (easy server-side uploads, signed URLs, transforms) 🚀 --single-branch ready — plug into CI/CD and start fast Why it matters: reduces time-to-market, enforces predictable file/layouts, and includes media management so you don’t waste cycles wiring uploads later. Would appreciate stars, issues, and PRs — especially if you test Cloudinary flows or add adapters for S3/other providers. staty tuned for the next update ; #NodeJS #Backend #OpenSource #Cloudinary #API #MERN #JavaScript #SoftwareEngineering #NPM #WebDev #CleanArchitecture #RestAPI

🚀 Node.js 24 LTS "Krypton" is here — Production-ready! The Node.js 24.11.0 LTS release is officially available, bringing long-term support until April 2028. This release is recommended for all production workloads, thanks to its stability, security, and a host of new features. What’s New and Exciting in Node.js 24 LTS? ⚡️ Performance Boost: Upgraded to V8 13.6 — enjoy up to 30% faster JavaScript execution, support for RegExp.escape, Float16Array, and much more. 🔒 Permission Model (Stable): Explicitly control access to filesystem, network, and environment resources, adding defense-in-depth for your Node.js apps. 🌍 Global URLPattern: Cleaner route matching without extra imports — now browser-consistent right inside Node.js. 🧪 Test Runner Improvements: Built-in test runner now runs tests in parallel by default for rapid feedback and CI/CD speed. 🧹 Explicit Resource Management: Deterministic cleanup with await using syntax means more robust async resource handling. 🌐 Upgraded Undici HTTP Client: Native HTTP/2 and HTTP/3 support in the updated Undici 7.0 library for modern API integrations. 🗂 npm 11 Bundled: Faster npm installs and smarter dependency management out of the box. Why upgrade? With LTS, your projects get consistent security patches and stability. Ready to supercharge your backend and join the future of server-side JavaScript? #NodeJS #NodeJS24 #JavaScript #WebDevelopment #LTS #Backend #OpenSource #DeveloperExperience #JavaScriptDeveloper #BackendDevelopment #APIDevelopment #FullStack #npm #V8Engine #CloudNative #TechTrends #Programming #SoftwareEngineer #WebDev #OpenSourceCommunity #ModernJS #ServerSideJS

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

HNG Tech The Video Version of my post 📯 🚀 Just Built My First HNG task RESTful API with External API Integration! I recently completed a backend challenge that pushed me to level up my Node.js skills. Here's what I built: ✨ The Project: A clean REST API endpoint that serves my profile information combined with real-time cat facts from an external API. Simple concept, but packed with learning! 🛠️ What I Built: - GET /me endpoint returning JSON data - Live integration with Cat Facts API - Dynamic timestamps (ISO 8601 format) - Graceful error handling with fallback strategies - Full CORS support and request logging 💡 Key Challenges & Solutions: 1️⃣ External API Reliability Problem: What if the cat facts API goes down? Solution: Implemented timeout handling (5s) and fallback messages. The app never breaks - it just returns a default fact. 2️⃣ Data Freshness Challenge: Ensure both timestamp and cat fact update on EVERY request Solution: No caching anywhere. Each request triggers a fresh API call and timestamp generation. 3️⃣ Code Organization Why it matters: Messy code = maintenance nightmare My approach: MVC architecture with separate layers for routes, controllers, and services. Each file has one job. 🏗️ Tech Stack: - Node.js & Express.js - Axios for HTTP requests - Deployed on [Your Platform - Railway/Azure/etc.] - GitHub for version control 📊 What This Taught Me: ✅ External API integration isn't just about making requests - it's about handling failures gracefully ✅ Error handling is as important as the happy path ✅ Modular code = easier testing & scaling ✅ Environment variables are your friend in production ✅ Deployment is a skill in itself (learned about Azure/Railway/etc.) 🔗 Try it yourself: [https://lnkd.in/dVtjREi4 💻 Source code: [https://lnkd.in/dqU9xaEg] This project forced me to think like a backend engineer - not just "does it work?" but "what happens when things go wrong?" What's your biggest lesson from a recent project? Drop it in the comments! 👇 #BackendDevelopment #NodeJS #API #JavaScript #WebDevelopment #SoftwareEngineering #TechLearning #CodingJourney

Cheat sheets save hours. Smart devs use them daily. 🧾 Top Sheets: Frontend (HTML/CSS) JavaScript (array, promises) Backend (Express routes) Database (MongoDB/SQL) DevOps (Git/Docker) 💡 “Don’t memorize. Strategize.” 📊 Status: Building public GitHub repo for free cheat sheets. 🔖 Hashtags: #CheatSheets #LearningResources #DeveloperTools

When working with Node.js, managing asynchronous code can be challenging. One effective approach is using async/await, which simplifies handling promises. Instead of chaining multiple `.then()` calls, you can write your code in a more synchronous manner. For example: ```javascript async function fetchData() { try { const response = await fetch('https://lnkd.in/dz48DrYF'); const data = await response.json(); console.log(data); } catch (error) { console.error('Error fetching data:', error); } } ``` This structure enhances readability and maintainability. However, be cautious with error handling as exceptions can be tricky. Also, async/await works best with ES2017 and later, so ensure your environment is compatible. Pros include cleaner syntax and easier debugging. However, it may introduce a slight performance overhead due to the additional handling of promises. Balancing readability with performance is key in your Node.js projects. #NodeJS #ProgrammingTips

🚀 Understanding Streams and Buffers in Node.js Have you ever wondered how Node.js efficiently handles large files like videos, logs, or data transfers without running out of memory? 🤔 The answer lies in Streams and Buffers — the backbone of Node.js I/O operations. A Buffer temporarily holds chunks of binary data, while a Stream processes that data piece by piece instead of loading everything at once. This approach makes Node.js incredibly efficient when dealing with big files or real-time data. Whether it’s reading a large CSV, serving a video, or handling file uploads, Streams help you process data continuously and save resources. Once you master Streams and Buffers, you can build scalable applications that handle massive data effortlessly. ⚡ 💭 Have you ever worked with file streams or HTTP streams in your Node.js projects? How was your experience? #NodeJS #JavaScript #BackendDevelopment #Streams #Buffers #Performance #WebDevelopment #Learning