CDN Explained: What It Is, How It Works, and How to Use It in Next.js✨ NewA CDN speeds up your app by serving assets from servers close to your users. Here's how it works and how Next.js takes advantage of it.Posted today·3 min read·#cdn#nextjs#performance#frontend#caching
queueMicrotask Explained: The Smallest Async Queue in JavaScriptWhat queueMicrotask does, how it differs from Promise.then, and how microtasks really work under the hood.Posted on December 31·1 min read·#javascript#event loop#microtask#async
Why async/await Doesn’t Make JavaScript Code ParallelAsync/await feels like parallel code, but it isn’t. Here’s why JavaScript is still single-threaded and how async really works.Posted on December 30·3 min read·#javascript#async#await#promises#event loop
How Promise.all Works in a Single-Threaded JavaScript WorldIf JavaScript is single-threaded, how can Promise.all handle multiple requests at the same time? A deep dive into the event loop and async I/O.Posted on December 30·2 min read·#javascript#promises#event loop#async#concurrency
Promise APIs Compared: all vs race vs any vs allSettledA practical and conceptual comparison of Promise.all, Promise.race, Promise.any, and Promise.allSettled.Posted on December 30·3 min read·#javascript#promises#async#event loop
Are TypeScript Enums a Good Idea? (Bundle Size & Runtime)A practical guide to TypeScript enums, their runtime cost, and better alternatives for modern frontend apps.Posted on December 30·3 min read·#typescript#enums#bundle-size#performance#frontend
Web Workers Explained for Frontend DevelopersHow Web Workers work, why they matter, and when to use them to achieve real parallelism in frontend apps.Posted on December 30·3 min read·#javascript#web workers#performance#parallelism#browser
useDeferredValue Explained: Keeping React UIs ResponsiveHow useDeferredValue works under the hood, when to use it, and how it differs from useTransition.Posted on December 12·1 min read·#react#hooks#concurrent#performance
useTransition Explained: Make React Feel InstantHow useTransition works under the hood, when to use it, and how it differs from useDeferredValue.Posted on December 12·3 min read·#react#hooks#concurrent#performance#ux
Understanding HttpOnly Cookies in DepthHow HttpOnly cookies work, why they're essential for security, and how to use them safely in Next.js and Express.Posted on October 14·3 min read·#cookies#security#web#nextjs#express
React Fiber Explained: How React’s Engine Actually WorksA deep but clear explanation of React Fiber — the engine that powers modern React rendering and concurrency.Posted on October 8·4 min read·#react#fiber#reconciliation#concurrent#react internals
React Context Explained: How It Works Under the HoodUnderstand what React Context is, how it works internally, and best practices for using it effectively.Posted on October 6·3 min read·#react#context#hooks#state management
BroadcastChannel API in JavaScriptHow to communicate between browser tabs, windows, or iframes easily using the BroadcastChannel API.Posted on October 5·3 min read·#javascript#web api#broadcastchannel#multi-tab#communication
Prefetching in Next.js Links ExplainedHow Next.js prefetch works in <Link>, why it makes navigation fast, and when to disable it.Posted on October 4·2 min read·#nextjs#link#prefetch#app router#performance
Why MUI Avoids Theme Flash on First Load (Dark/Light Mode)How MUI applies the correct color scheme on the very first paint, and why other UI kits often flash light before switching to dark.Posted on September 29·3 min read·#mui#nextjs#dark mode#hydration#css variables
Deep Copy vs Shallow Copy in JavaScriptUnderstand the difference between shallow and deep copies, with examples and pitfalls.Posted on September 26·2 min read·#javascript#copy#objects#cloning
Why setState Doesn’t Cause Hydration ErrorsUnderstanding why calling setState after hydration doesn’t produce hydration mismatches in React/Next.js.Posted on September 26·2 min read·#react#hydration#setState#nextjs
AbortController & AbortSignalEverything you need to cancel async work in JS: fetch, streams, custom tasks, React patterns, Node notes, timeouts, races, and common pitfalls.Posted on September 23·4 min read·#javascript#abortcontroller#abortsignal#fetch#async#react#node
How useState Works Under the Hood (and Why It Needs use client)Deep dive into React's useState, how it works internally, and why client components are required in Next.js App Router.Posted on September 23·4 min read·#react#hooks#useState#nextjs#use client
JavaScript Closures — A Simple Deep DiveWhat closures are, how they work (lexical scope), and how to use them without pitfalls.Posted on September 23·5 min read·#javascript#closures#scope#lexical environment
JavaScript Promises ExplainedA simple but deep dive into how Promises work in JavaScript and why they matter.Posted on September 23·2 min read·#javascript#async#promise#event loop
JavaScript is Single-ThreadedUnderstand what it means when people say JS is single-threaded.Posted on September 23·2 min read·#javascript#event loop#async
What is 'use client' in Next.js?Understand 'use client' in Next.js App Router: what it means, when to use it, and how it works under the hood.Posted on September 23·2 min read·#nextjs#react#use-client#server-components#frontend
Next.js Page Router vs App RouterUnderstand the key differences between the old Page Router and the new App Router in Next.js.Posted on September 23·2 min read·#nextjs#react#routing#frontend
JavaScript Event Bus 🚍 (JS + TypeScript)A polished, practical event bus pattern with minimal JS, a strongly-typed TS version, wildcards, once-handlers, and React usage tips.Posted on September 21·4 min read·#javascript#event-bus#pubsub#architecture#typescript#react
React Higher-Order Components (HOC)Understand Higher-Order Components (HOCs) in React with examples, use cases, downsides, and a comparison to hooks.Posted on September 21·2 min read·#react#hoc#patterns#frontend
JavaScript's Event Loop — Simple Guide (with SVG Timeline)Event loop explained with a clean SVG timeline showing the actual execution order: Start → End → Promise → Timeout.Posted on September 20·1 min read·#javascript#event-loop#async#promises#frontend#diagram
Microtask vs Macrotask in JavaScript — With Node.js vs Browser NotesUnderstand microtasks and macrotasks across browsers and Node.js, including process.nextTick, setImmediate, and event loop phases.Posted on September 20·3 min read·#javascript#event-loop#microtask#macrotask#nodejs#browser
Next.js App Router Caching — Cheat SheetA compressed reference of Next.js caching layers and controls (App Router).Posted on September 20·2 min read·#nextjs#caching#app-router#performance
React useRef vs useState — When to Use WhichA simple guide to understanding when to use useRef and useState in React, with examples, mental models, and a quick cheatsheet.Posted on September 17·2 min read·#react#hooks#useRef#useState#frontend
When Should You Use Dynamic Import in React/Next.js? (With Performance Comparison)A practical guide to dynamic imports with real-world examples and a before/after bundle-size comparison using next-bundle-analyzer.Posted on September 17·3 min read·#react#nextjs#dynamic-import#performance#bundle-size
Git Rebase vs Git Merge — Simple GuideUnderstand the difference between git rebase and git merge with analogies, ASCII diagrams, and visual commit history diagrams.Posted on September 16·1 min read·#git#version-control#rebase#merge#basics
Frontend Design Patterns — A Practical GuideA concise, example‑driven overview of the most useful frontend patterns for modern React/Next.js apps.Posted on September 15·4 min read·#frontend#design-patterns#react#architecture
MVVM, Micro‑Frontends, and Domain‑Driven Frontend — A Practical GuideClear, practical explanations of MVVM, micro‑frontends, and domain‑driven design for modern React/Next.js teams, with examples, folder structures, and trade‑offs.Posted on September 15·6 min read·#architecture#frontend#mvvm#micro-frontends#ddd#react#nextjs
Event Bubbling vs Event Capturing in JavaScriptUnderstand how events travel through the DOM: bubbling (bottom-up) vs capturing (top-down) with simple examples and mental models.Posted on September 13·1 min read·#javascript#events#dom#basics
Async vs Sync in JavaScriptUnderstand the difference between synchronous and asynchronous code in JavaScript with simple examples and analogies.Posted on September 13·1 min read·#javascript#async#sync#basics
SOLID Principles Explained SimplyAn easy-to-understand guide to SOLID principles for cleaner, more maintainable code.Posted on September 13·2 min read·#solid#principles
What is Docker? The 2-minute mental modelUnderstand containers like folders for apps—portable and predictable.Posted on August 11·1 min read·#docker#basics