Track income, expenses, and savings in your browser — no bank sync, no account required, your data stays on your device.

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Twelve Node.js built-ins that replace axios, nodemon, dotenv, jest, chalk, glob and more, with their stability in Node 24 and one gotcha each.

What comes to mind when you hear "frontend optimization"? For most of us it's things like reducing network requests, shrinking the bundle,…

Ten checks that catch what AI-written frontend code hides: contract codegen, boundary linting, mutation testing, and dead-code detectors.

Every element I use for the basic structure of a HTML document, with explanations why.

JSON looks like a faithful representation of JavaScript data, but JSON.stringify and JSON.parse can silently alter or discard information at system boundaries.

A practical rundown of tools, settings, and habits that reduce token consumption when using Claude Code as your daily AI coding assistant.

A comprehensive comparison of modern frontend frameworks

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Playwright CI should not crawl. Learn how to cache browsers, run tests in parallel, and cut GitHub Actions time fast.

Every year after the final language specification approval, I publish about the latest additions to the language. Here is a full list.

Agents can write code faster than we can absorb it. Here's why it still matters for humans to understand what they build — and some techniques for doing that efficiently: explainer docs, quizzes, micr...

Think you know your way around a test suite? These React testing interview questions cover act(), debounced inputs, mocking pitfalls, IntersectionObserver, and more. They can be harder than they look.

Use command and commandfor to open a native dialog in React without useState or dialog libraries.

There are a bunch of JavaScript animation libraries out there, and you might have wondered whether there’s a performance cost compared to traditional CSS transitions and keyframe animations. In this b...

A curated collection of practical TypeScript patterns that improve safety, readability, maintainability, and developer experience. - AllThingsSmitty/typescript-tips-everyone-should-know

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This article covers a layout approach that better fits the modern web: fluid, intrinsic components that adapt by default, and treat conditional rules as local, intentional exceptions.

It doesn't mean you can't get AI to help with accessible code, you've just got to know what you're doing.

CSS now does what Floating UI, GSAP ScrollTrigger, Framer Motion, and react-select used to require JavaScript for. Here is exactly how much that saves, why these libraries were painful beyond their si...

`Intl.NumberFormat` supports localized currency and unit formating.

An overview of what's new in language features, frameworks, runtimes, build tools, testing, and more.

Think you know CSS? Real property or made-up nonsense? 20 rounds. No mercy.

Users don't use data-testid, so why do your tests?

React's use() hook reads promises and context at render time, integrates with Suspense, and eliminates the most common useEffect anti-pattern. This article explains what it replaces, when to reach for...

I started naming my useEffect functions about a year ago. It changed how I read components, how I debug them, and eventually how I structure them.

"AI-assisted coding changes the game for enterprises by shifting the bottleneck from coding to judgment, impacting software builds and roles."

What Is He Covering Up?

Can you spot the better API? Train your eye for clean React component APIs in under 5 minutes.

We scanned 500 public React, Vue, and Angular repositories with AST-based static analysis and found 55,864 missing-cleanup patterns — 86% of repos had at least one. Then we benchmarked five common lea...

AI coding is blurring the lines between engineers, PMs, and designers. In the short-term, it's going to cause havoc. What happens long-term?

Your docs are good. Your types are solid. Your agent still gets it wrong. Not because it's dumb — because nothing connects what you know about your tool to what agents know. Docs target humans who bro...

Summary: An AI agent of unknown ownership autonomously wrote and published a personalized hit piece about me after I rejected its code, attempting to damage my reputation and shame me into acceptin…

A collection of modern CSS code snippets. Every old CSS hack next to its clean, native replacement, side by side.

Save OSAP from Doug Ford's cuts. Fund Education Now!

The 2025 edition of the annual survey about the latest trends in the React ecosystem.

A deep dive into the math behind making mismatched brand logos actually look good together. And a tiny React library that does it for you.

The real test isn’t whether your component works on your current page. It’s whether it works when someone else uses it.

YouTube video by Marit Stiles

The 2025 edition of the annual survey about the latest trends in the JavaScript ecosystem.

Eslint plugin for react.js and react-native apps with @preact/react-signals. exhaustive-deps on steroids. - ospm-app/eslint-plugin-react-signals-hooks