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Javascript

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

Articles

JavaScript

Your scroll listener fires on every pixel. IntersectionObserver fires when visibility actually changes.

Jul 19 · 4 min CSS

You're using Floating UI to position your tooltip. The browser does it natively now.

Jul 18 · 5 min JavaScript

Your .sort() is mutating state. JavaScript finally gave you the fix.

Jul 15 · 4 min JavaScript

You've been writing this reduce a hundred times. Object.groupBy does it in one.

Jul 14 · 4 min JavaScript

JavaScript Event Loop Explained: The Complete Guide

Jul 13 · 13 min JavaScript

You reach for Promise.all for every concurrent request. Here's when to use the other three.

Jul 13 · 5 min JavaScript

Your dropdown is a div. The browser has a native popover now.

Jul 12 · 4 min TypeScript

Your TypeScript config objects are losing type information. satisfies fixes it.

Jul 11 · 5 min JavaScript

You've been deep-cloning objects with a JSON hack. structuredClone does it right.

Jul 10 · 4 min CSS

You kept Sass for one reason. Native CSS nesting just ended it.

Jul 9 · 4 min CSS

You can't transition a CSS variable. @property says otherwise.

Jul 8 · 5 min CSS

Your scroll listener is doing CSS's job

Jul 6 · 5 min
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