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A deep dive into Blue Earth, an experiment that plots positive climate news stories on a rotating 3D globe using the HTML in Canvas API, Three.js, and a build-time pipeline powered by Claude and Geoapify.
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What started as a question about a free macOS image viewer turned into a deep dive into pan and zoom math, pointer events, WheelEvent quirks, and a TypeScript web component. Here is everything we learned along the way.
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How the new Set methods difference() and symmetricDifference() can replace verbose Set comparisons with clear, expressive code.
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How combining JSDoc annotations with Object.freeze gives you literal type inference, runtime immutability, and better IDE support for JavaScript constant objects.
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A deep dive into the JavaScript concepts behind mocking HTMLImageElement behaviour in Vitest, including Object.defineProperty, Object.getOwnPropertyDescriptor, prototype manipulation, and WeakMap for per-instance state tracking.
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Learn how to safely select DOM elements with special characters in their IDs or classes using CSS.escape() to avoid selector parsing errors.
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Learn how to programmatically require the presence of a modifier key to enable scroll wheel zoom support in Leaflet maps.
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How to use TypeScript’s triple-slash reference directives to load type definitions when type-checking JavaScript with JSDoc.
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Combining Zod's runtime validation with JSDoc's type annotations to achieve type safety in JavaScript without TypeScript.
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What I learned reviewing AI-generated JavaScript: real-world issues, code review tips, and ways to ensure robust, production-ready code.
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While this post does not by any means aim to cover all the amazing things you can do with Intl.NumberFormat, I do cover two very common use cases you may have faced when formatting numbers in JavaScript.
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Using the Nodejs EventEmitter with GitHub webhooks
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How to cancel asynchronous operations with the AbortController API.
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An introduction to Flexsearch and its tokenizers through writing and interpreting tests.
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When running your Playwright tests, how do you load a different set of data based on the current execution environment?
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There are a couple of steps to take when switching from the older babel-eslint to the newer @babel-eslint. No worries, I'll show you how.
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How do you style the cursor in CodeMirror 5? Also, how can you do this for light and dark themes? Let's take a look.
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Could it be that the == operator in JavaScript had a bad rap and it’s time to reconsider it?
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Some thoughts on the current state and challenges with regards to building a PWA in 2021.