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Javascript

141 articles on Javascript — each with a runnable playground and a quiz.

Articles

Nuxt

Nuxt 4.6 useSession: Server Sessions Without a Database

Oct 18 · 13 min React

React 19.2 useEffectEvent: Why It Won't Fix Your Deps Array

Oct 17 · 15 min TypeScript

Inferred Type Predicates Won't Save filter(Boolean). Here's What Will.

Oct 17 · 5 min JavaScript

Stop Electing a Leader Tab. SharedWorker Just Holds the Connection.

Oct 15 · 6 min 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 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 JavaScript

Stop Losing Promise Errors. unhandledrejection Catches Them.

Oct 8 · 5 min
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