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Webdev

174 articles on Webdev — each with a runnable playground and a quiz.

Articles

JavaScript

You Installed a Library for Numbers PerformanceObserver Already Has.

Oct 14 · 7 min JavaScript

Your Tabs Each Open Their Own WebSocket. navigator.locks Elects One.

Oct 13 · 6 min Nextjs

Next.js 16 Image: priority Deprecated, quality Now Allowlisted

Oct 13 · 15 min Vue

Vue watch vs watchEffect: The Complete Guide

Oct 12 · 15 min JavaScript

I Shipped a Fix. My Service Worker Kept Serving the Bug.

Oct 12 · 6 min Nuxt

Nuxt 4 Migration: The Breaking Changes That Actually Bite

Oct 11 · 14 min JavaScript

Your Lighthouse Score Is 100. Long Animation Frames Explain the Jank.

Oct 11 · 6 min React

React 19.3 Fragment Refs: Skip the Wrapper Div for a Ref

Oct 10 · 13 min CSS

You Added will-change to Fix the Jank. You Made It Worse.

Oct 10 · 5 min CSS

You're Animating for Everyone. prefers-reduced-motion Fixes That.

Oct 9 · 6 min JavaScript

Stop Losing Promise Errors. unhandledrejection Catches Them.

Oct 8 · 5 min JavaScript

Stop Retrying Immediately. Exponential Backoff Fixes It.

Oct 7 · 6 min
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