DevIdiot!

I built a physics-based PWA because health devices ignore basic geometry

The PainI got into Red Light Therapy for recovery and quickly realized the hardware market is messy.Manufacturers advertise numbers like “100 mW/cm² irradiance”, but that value is almost always measured at the panel surface.Move even a few inches away and the delivered energy drops sharply due to basic geometry (Inverse Square Law).This is high-school physics, yet most manuals never mention it. The FixI didn’t want to open Excel before every workout.So I built a physics-based dosing c

I Built a Web-Based Server OS with a Real Desktop Experience (Open Source)

For years, server dashboards have looked like boring admin panels.I wanted something different.So I built CozyUI — a fully open-source WebOS-style server management interface that runs entirely in the browser.🌐 Live Demo: https://swingsql.space/Login: starvarse / 123456✨ What Makes CozyUI Different?Instead of traditional sidebar dashboards, CozyUI gives you:A real desktop interfaceDraggable and resizable windowsDock for quick accessMenu bar with system statsTheme & wallpaper customizationIt

Make Reactivity easy

Many UI frameworks make reactivity feel unnatural.React relies heavily on immutability so it can detect changes efficiently using reference checks.That works, but it also means you often end up writing lots of copying/spreading code just to update state.Angular is moving toward a more reactive model with Signals.Signals are powerful, but they still introduce a new API and a different way of thinking:Wrap valuesUse set() / update()Add extra wiring (effect() / useEffect()) especially around async

Building a Menu Scanner with OCR and AI

Scanning a restaurant menu with your phone and instantly seeing structured nutritional data feels like magic—but with the right combination of OCR and AI, it’s a project well within reach for developers. As consumer demand for transparent nutrition information grows, building a menu scanner that bridges the gap between printed menus and actionable health data is both an exciting technical challenge and a genuinely useful tool.Let’s explore how to turn images of menus into structured, actionable

I Built 117 Free Developer Tools in Next.js 15 & Sold the Complete Source Code for $79 (Here's My ROI)

I spent 50 hours building 117 developer tools. Then I made $1,500 in the first week selling the source code.Here's exactly how I did it (and the code you can steal). The Problem I SolvedEvery developer knows the pain:You need to format JSON quicklyYou Google "JSON formatter"You land on a site with 5 ads, 3 popups, and "sign up for premium"Your data gets uploaded to some random serverYou close the tab, frustratedThis happened to me 100+ times.So I built DevUtility Hub — 117 free developer to

Seeing Theory

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The AI Revolution in Full Stack Development: 2026 Comprehensive Guide

The tech world in 2026 isn't just about coding; it's about orchestration.We've moved from being "mechanics" to "architects" of AI systems. In this guide, I explore:The 2026 AI Standard: Why AI agents are the new microservices.The Essential Stack: Tools like Cursor AI and CodiumAI.Economic Reality: Why AI-integrated developers are earning 50% more.Read the full, detailed guide with the complete 2026 roadmap and illustrations here:👉 https://codebitdaily.blogspot.com/2026/02/ai-revolution-full-stac

Oat – Ultra-lightweight, semantic, zero-dependency HTML UI component library

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[Boost]

My 🔥 First Experience Attending TC39 Tierney Cyren ・ Apr 15 '19 #javascript #webdev #opensource #tc39

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Why Your Code Is Always Off By One (And How to Finally Fix It)

Your loop processes the wrong number of items. Your array crashes with an index out of bounds error. Or worse—your code runs without errors but produces subtly wrong results that won't surface until production.Welcome to off-by-one errors (OBOE), so common they inspired this joke: "There are two hard problems in computer science: cache invalidation, naming things, and off-by-one errors."Boundary condition errors account for 15-25% of all software bugs. From NASA's Mars Climate Orbiter mishap to

ReactJS Design Pattern ~Provider Pattern with Context API~

・This pattern eludes props drilling by using the context API.contexts/UserContext.tsimport { createContext } from 'react'export const UserContext = createContext('Inital user')components/Dashboard.tsximport React, { useContext } from 'react'import { UserContext } from '@contexts/UserContext'export const Dashboard = () => { const userValue = useContext(UserContext) return <h1>{userValue}</h1>}App.tsximport React from 'react'import { UserContext } from '@contexts/UserContext'impor

20 Websites That Solve Problems Before You Even Google Them

For web developers & web designers who are tired of reinventing the wheel every single sprint"The best tool is the one you don't have to think about."There's a specific kind of frustration that only developers and designers know. You're mid-flow, building something, and then you hit a wall — a CSS property you can't quite recall, a color palette that isn't clicking, an SVG file that exported bloated and broken, a font pairing that should work but doesn't. And then the tab spiral begins. Ten

Flashpoint Archive – Over 200k web games and animations preserved

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From Context to Redux to Zustand: The New Era of React State Management

In the evolving world of React, state management has always been a central challenge. Developers first leaned on the built-in Context API to escape prop drilling, then embraced Redux for its strict patterns and enterprise-level predictability. But as modern apps demand speed, simplicity, and flexibility, a new contender has emerged: Zustand. This lightweight library is reshaping how developers think about managing state, offering the efficiency of hooks, the clarity of minimal code, and the scal

React Debugger Extension: Detect Re-renders, Memory Leaks, and Anti-patterns in Real Time

Stop Debugging React Blindly: Meet React Debugger ExtensionA powerful Chrome DevTools extension that makes debugging React applications feel less like guesswork and more like detective work. The Problem Every React Developer FacesWe've all been there. Your React app is slow. Components re-render for no apparent reason. Memory usage keeps climbing. Layout shifts ruin the user experience. And you're left wondering: where do I even start?Traditional debugging tools help, but they weren't

Guitars of the USSR and the Jolana Special in Azerbaijani Music

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Day 13 of #100DaysOfCode — Understanding TanStack Query

TanStack Query is one of those libraries that instantly makes your life easier when working with server-side data. Whether you're fetching user info, working with dashboards, or building something real-time like a chat app, TanStack Query takes away a lot of the repetitive code we usually write in React.Today, in my Day 13 of #100DaysOfCode, I dug deeper into TanStack Query — and here’s everything I learned, explained in a simple and practical way. What Exactly Is TanStack Query?TanStack Qu

I love the work of the ArchWiki maintainers

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