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React useEventListener Hook: Type-Safe DOM Events (2026)

Here's a modal close-on-Escape that quietly does the wrong thing:function Modal({ onClose }: { onClose: () => void }) { useEffect(() => { const onKey = (e: KeyboardEvent) => { if (e.key === "Escape") onClose(); }; window.addEventListener("keydown", onKey); return () => window.removeEventListener("keydown", onKey); }, [onClose]); return <div role="dialog">…</div>;}If the parent passes an inline onClose={() => setOpen(false)} — and it almost always do

Your amortisation schedule is one row short, and only sometimes

You cannot be billed $1,896.2027.That is the whole bug, and I had it in a loan calculator and an amortisation schedule for months without noticing, because on most of the numbers I tested with it makes no difference at all. The lineStandard amortisation. Work out the monthly payment, then walk the balance down month by month:let pay = principal * r / (1 - Math.pow(1 + r, -n));let balance = principal;while (balance > 0.005) { const interest = balance * r; let principalPart = pay

VS Code 1.134 Is Here — Side-by-Side Chats, Prompt Timeline, and More Features You'll Actually Use

If you've ever scrolled forever trying to find something you typed ten minutes ago in a long chat session... VS Code 1.134 just heard your pain. 😅Released on August 19, 2026, this update is one of those rare releases that feels like the team was watching over your shoulder while you worked. It fixes small but real annoyances, adds tools for managing complex agent sessions, and makes the whole editor feel a bit more like a smart workspace and less like a blank canvas you have to fight every day.S

Web Accessibility Beyond the Checklist: The WCAG Techniques That Actually Matter in Production

Accessibility audits tend to produce the same artifact: a spreadsheet with forty rows, each one a WCAG success criterion, each one marked pass or fail. It's useful for compliance. It's almost useless for knowing what to actually fix first, or understanding why a page that technically passes automated testing still fails a real screen reader user in about eleven seconds.This guide skips the checklist framing and goes straight to the techniques that produce measurably better outcomes for real assi

A row window makes scrolling free and does nothing for the load

Everyone keeps telling me to virtualize a React table past a few hundred rows. I built a row window for mine and then measured the same table twice: Once as it ships, and once with the window turned off by raising its threshold above the row count.It buys scrolling. It does nothing at all for the load, and that is the half nobody publishes. What I measuredCompact density, ten columns, a 120Hz display, and a batch of rows loaded by a button that stands in for a fetch with a 450ms pause.Every

Testing Persian Text Tools with Real-World Edge Cases

When testing text-processing tools, simple examples are usually not enough.A sentence like "Hello world" can show that a basic counter works, but it does not reveal how a tool behaves with real content.Real Persian text brings many edge cases that are easy to miss. Why simple test cases failMany text tools are first tested with clean examples:A few words separated by spacesShort sentencesSimple numbersPlain English textThese examples are useful, but real documents are much more complicated.

Devlog: Data Breach Notification & Regulatory Report Generator – How We Built a GDPR, CCPA, and NIS2 Tool

IntroductionWelcome to another devlog from Pixel Office! Today we're looking at our new product Global Data Breach Notification & Regulatory Report Generator – a tool that automates the creation of data breach notifications under GDPR (Art. 33), CCPA, and NIS2. In this article, we'll show you how we designed, programmed, tested, and deployed this widget. The Technical ChallengeSeveral issues came up during the design. First of all:72-hour deadline – regulatory authorities require

Devlog: B2B Lead Enrichment & Contactability Verifier – How We Built the Email Verification Tool

IntroductionAt Pixel Office, we constantly push the boundaries of automation and AI. Today, we bring you a devlog about our latest product: B2B Lead Enrichment & Contactability Verifier. This tool is designed for fast verification of B2B lead quality, email deliverability checks, and contactability score calculation. Technical ChallengeOur goal was to create a tool that:Validates MX records for a given domainChecks email address syntax according to RFC 5321Verifies domain age (WHO

AliExpress vs Alibaba for Dropshipping: Which One Should You Use in 2026?

AliExpress vs Alibaba for Dropshipping: Which One Should You Use in 2026?This is a short excerpt — the full article is on news.astools.app, with screenshots, methodology, and the data. What's coveredThe framework behind the score / decision ruleReal numbers from product testingFull step-by-step workflowComparison vs paid SaaS alternativesDirect screenshots of the AStools UI Why I wrote thisMost "winning products" content is vibes. The numbers are simulated, the screenshots are st

AliExpress Promotions Finder: Free Deal Tool 2026

AliExpress Promotions Finder: Free Deal Tool 2026This is a short excerpt — the full article is on news.astools.app, with screenshots, methodology, and the data. What's coveredThe framework behind the score / decision ruleReal numbers from product testingFull step-by-step workflowComparison vs paid SaaS alternativesDirect screenshots of the AStools UI Why I wrote thisMost "winning products" content is vibes. The numbers are simulated, the screenshots are stock, the methodology is

Switch Icons v0.2.0: A React Icon Library Built for the Icons Developers Actually Need

Modern web applications rarely need only arrows, menus, and generic interface icons.A fintech dashboard needs payment and banking icons. A logistics platform needs waybills, packages, warehouses, and delivery trucks. An AI application needs model, prompt, and AI-related visual language. An African commerce platform may need icons that represent local payment methods such as Naira, USSD, POS, and bank transfers.That is the idea behind Switch Icons.Switch Icons is a modern, developer-focused React

Windows brings out the Rorschach test in everyone

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I Stopped Asking Cursor to “Fix My Code” Here’s What I Do Instead

Cursor is one of the most powerful AI coding editors available today. But if you've used it on a real React codebase, you've probably hit this frustrating pattern: you ask for a small change, and Cursor rewrites half your component, breaks your state logic, or introduces bugs that weren't there before.This isn't bad luck. It's a predictable problem with a predictable fix.In this article, you'll learn exactly why Cursor keeps breaking your React code, the mistakes most developers make when prompt

Why Microsoft Entertainment Pack had a sticker announcing that it had Tetris?

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The End of useMemo: React Compiler in Next.js

The Exhausting Re-Render CrisisFor the past decade, building highly interactive React applications has been a delicate balancing act. React’s core architecture dictates that when a component's state or props change, that component—and every single one of its nested child components—must re-render. While React's Virtual DOM makes this process relatively fast, in massive enterprise dashboards with data grids, interactive charts, and deeply nested UI trees, these cascading re-renders inevitably des

Why input.value = 'x' doesn't fill a React form (and what actually works)

If you have ever tried to script a React form — a test helper, a browser extension, a bookmarklet, an onboarding demo — you have probably hit this:document.querySelector('#email').value = '[email protected]';The field shows the text. It looks filled. Then you submit, and React sends an empty string. Or the "Next" button stays disabled. Or the value vanishes the moment anything else on the page re-renders.I ran into this repeatedly while building a form-filling extension, and the fix is not obviou

Detect & Fix Order‑Book Timing Gaps Between Snapshot and Incremental Updates

IntroThis article shares notes from quantitative prototyping work, simulating fund‑research workflows to build high‑frequency cryptocurrency trading demos. Order‑book depth data is critical for slippage simulation, factor calculation and strategy backtesting.Many developers focus primarily on API latency and quote update speed when getting started. It’s easy to assume that as long as data keeps flowing in, order‑book calculations will remain accurate. But there is an easy‑to‑miss risk: loc

How to Stop Your Discord Bot From Sleeping on Render's Free Tier

A step-by-step tutorial to stop a discord bot from sleeping on Render's free tier — the real cause, the fix, and a working code example. How to Stop Your Discord Bot From Sleeping on Render's Free TierYou've deployed your Discord bot to Render's free tier, it worked for a bit, and now it's going offline — sometimes after a few minutes, sometimes randomly. This is one of the most common issues developers hit deploying a bot for the first time, and it has a specific, well-understood cause and

How I Built an ADHD Thought Detector in 70 Lines of Vanilla JavaScript — No AI, No NLP, No Sentiment Analysis

ADHD comes with a specific flavor of painful thoughts: "They hate me", "I'm lazy", "Everyone is further along than me". These aren't random — they map to known cognitive distortions, and one of them (rejection sensitive dysphoria, or RSD) is almost unique to ADHD. I built a detector that catches them in 70 lines of vanilla JS. No model. No API. No sentiment library. The problem: ADHD thoughts have a signatureIf you have ADHD, you know the pattern. A small thing happens — a colleague doesn't

How I Built a Burnout Thought Detector in 100 Lines of Vanilla JavaScript — No AI, No NLP, No Sentiment Analysis

When you build anything that reads someone's thoughts and says "that's a burnout thought," the assumption is immediate: you need sentiment analysis. An LLM. A fine-tuned classifier. Something that "understands" the nuance of exhaustion and cynicism.You don't.I built a tool that takes a thought — "If I rest, everything will collapse" — and classifies it into the specific cognitive distortion driving it — Catastrophizing (predicting catastrophe without evidence) — then generates the targeted CBT r