How to use the Fetch API for web development

🧠 Day 32 — Web Development Today’s lecture was a deep dive into how JavaScript actually works behind the scenes — understanding its single-threaded nature and the magic of asynchronous execution. 🔍 What I Learned: - Why JavaScript is single-threaded and synchronous by design. - The truth behind its non-blocking behavior. - How Web APIs manage async operations like setTimeout, fetch, and promises. - The role of the Event Loop, Callback Queue, and Task Queue in handling concurrency. - Step-by-step visualization of how JavaScript executes code efficiently without freezing the browser. 💡 This session cleared up how async functions truly work — now the concepts of event loops and callbacks finally make sense. #WebDevelopment #JavaScript #Frontend #LearningJourney #AsyncJS #EventLoop Rohit Negi

The One Routing System That Works on Both Sides of JavaScript Last month I was reading through some discussions on routing libraries, and I noticed something interesting: everyone was complaining about the same problem. They had routing logic scattered across their codebase. One version in their backend. Another in their service worker. Sometimes a third in their client-side code. Each one worked a little differently. Each one required learning a different syntax. It felt wasteful. Like solving the same problem four times instead of once. Then I discovered that Node.js 24 made URLPattern a global. No imports. No external dependencies. Just native JavaScript that works the same way in your browser and your server. I realized I could finally bring everything together. One routing system. One source of truth. One syntax that worked everywhere. Let me show you what I built. #javascript #typescript #nodejs #web https://lnkd.in/dDN_uGDH

Understanding the structuredClone method structuredClone() — The Modern Way to Deep Copy in JavaScript Concept: structuredClone() is a native JavaScript method that creates a deep copy of objects, arrays, Maps, Sets, and more — without needing external libraries or complex hacks. 💻 Example: const original = { a: 1, b: { c: 2 } }; const copy = structuredClone(original); copy.b.c = 3; console.log(original.b.c); // 2 (remains unchanged) console.log(copy.b.c); // 3 Why It Matters: ✅ Deep copies objects safely (no shared references) 🚫 No need for JSON.parse(JSON.stringify(...)) hacks 🔄 Handles circular references gracefully ⚡ Native browser API — no dependencies! 🎨 #JavaScript #WebDev #FrontendTips #StructuredClone #JSDeepCopy #CodingTips #WebDevelopment

In React, the difference between controlled and uncontrolled components defines how you handle form data. In controlled components, React state drives the form input meaning, what you type is synced with a state variable. In uncontrolled components, the DOM keeps the data, and you access it via useRef. Controlled gives you predictability, validation, and control. Uncontrolled is simpler, less boilerplate, but harder to track and test. If you’re building anything beyond a basic form, controlled is usually the way to go. Have you ever mixed both in the same form? #react #frontend #javascript #webdevelopment

Have you ever wondered why a setTimeout call even with zero delay executes after a Promise.resolve().then()? Many developers assume JavaScript runs strictly line-by-line, but the reality involves a hidden orchestrator that manages asynchronous priorities: the Event Loop. Understanding the Event Loop isn't just theory; it's fundamental to writing fast, reliable, and performant web applications that avoid blocking the main thread. In my new article on Medium, I break down a simple code snippet to precisely explain the mechanics of the Microtask and Macrotask Queues and reveal why Promises get absolute priority. Click the link below to dive in and uncover the secret behind this non-intuitive execution order: [ https://lnkd.in/dEFGEXSC] #Javascript_EventLoop #Microtasks #Macrotasks

localStorage - One of the simplest yet most powerful browser features every front-end developer should master A Practical Guide to Using localStorage in JavaScript (With Mini Project) Richa Parekh ・ Nov 12 #javascript #web #learning #frontend https://lnkd.in/deeT7hpA

💡 From a real work problem… to a simple practical tool! Every day at work, we receive new leads, and my manager always needs a quick report: how many answered, didn’t answer, wrong numbers, or gatekeepers? We used to count all that manually every time — it was time-consuming and repetitive. So I decided to build a small tool using HTML + CSS + JavaScript, called 👉 Leads Report Handler It automatically calculates the report as you update the counts and generates a ready-to-copy summary you can instantly share. 💾 It even saves your data in localStorage, so when you refresh or reopen the page, your progress stays the same. 🎨 Simple, clean, and built entirely with Vanilla JavaScript — no frameworks, no libraries. This project reminded me that even the smallest idea, when it solves a real problem, can make a big difference 💪 🔗 Code + Live Demo: GitHub: https://lnkd.in/dDXf9jnd Live Demo: https://lnkd.in/dG_cfzKY — #javascript #frontend #webdevelopment #problemSolving #opensource #productivity #developer #innovation

🧠 Day 49 | Web Development Challenge Today’s lecture: The Event Loop in JavaScript 🔄 Finally understood how JavaScript manages asynchronous tasks through the Call Stack, Web APIs, and Callback Queue. It’s fascinating how a single-threaded language can handle multiple operations seamlessly! ✨ Key Insight: > The Event Loop is what keeps JavaScript non-blocking — letting your code run smoothly without freezing the UI. #JavaScript #EventLoop #AsyncJS #WebDevelopment #Frontend #LearningJourney #CodeNewbie

⚡ JavaScript Performance Tips That Matter 🔥 Debouncing - Limit function calls 🔥 Memoization - Cache expensive calculations 🔥 Code splitting - Load what you need 🔥 Web Workers - Heavy tasks off main thread Optimize for user experience, not just code elegance. #JavaScript #Performance #WebOptimization #UserExperience