Principal Design Engineer | Design Systems & Frontend Architecture | Component APIs, React, TypeScript | Open Source Maintainer

Michigan, USA
Joined June 2009
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Replying to @CleoElisse
Goff ain't dropping bars. He's dropping a deuce.
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Replying to @Wendy1u17
Your image. AI generated pictures didn't exist in 1975. I didn't have to wait.
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Replying to @marklearst @figma
Also in v2.0.0 Light and dark modes 6 accent themes that stay readable Templates for common checklist scopes Improved Markdown export with WCAG level coverage summary
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Replying to @marklearst @figma
Big update: Contrast Inspector. Select a layer, press Check, get ratio and grade, plus a clear pass or fail status. Supports solid fills and single gradients. Swap to preview reversed contrast, Clear to reset.
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a11y Companion v2.0.0 is live for Figma and FigJam. Guided WCAG checklist tracking, inside the file. @figma: figma.com/community/widget/1… #a11y #accessibility #wcag #w3c #figma #figjam #uxdesign #uidesign #designsystems #frontend
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Replying to @KintuLabs
You can now add "AI Founder x52" in your LinkedIn Headline
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Replying to @felixleezd @ADPList
🙋🏽‍♂️
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@dariuscosden still puts out top tier content on YouTube! #React
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Go take the State of #JavaScript 2025 survey if you have a minute! survey.devographics.com/surv…
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Mark Learst retweeted
🧪 Found a cool glass calendar design in Figma and wanted to test AI hallucination ChatGPT couldn't build it in pure CSS, so I did! ✨ Features: - Frosted glass backdrop blur - Two-layer gradient design - 100% CSS - no JavaScript codepen.io/marklearst/pen/zx… #CSS #AI #Frontend
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🧪 Found a cool glass calendar design in Figma and wanted to test AI hallucination ChatGPT couldn't build it in pure CSS, so I did! ✨ Features: - Frosted glass backdrop blur - Two-layer gradient design - 100% CSS - no JavaScript codepen.io/marklearst/pen/zx… #CSS #AI #Frontend
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Too easy but fun! I just beat Grid Garden, a game for learning CSS grid layout! cssgridgarden.com via @playcodepip
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Most people treat AI like a shortcut to insight. It’s not. It’s a mirror. It reflects your clarity... or your confusion! If you don’t feed it real signal, it’ll remix the internet’s junk drawer with perfect fluency. Build with intent. Or don’t bother pressing Enter. #AI #buildinpublic #dev #design #signalovernoise #contextmatters
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🩸 diabetic-utils v1.2.0 beta 1 just dropped. Clinical-grade math for CGM and A1C apps. No vibes. Just 100% test coverage and edge-case handling. 🧪 MAGE (Service 1970) 📊 SD, CV, Percentiles ✅ 34 targeted clinical tests 🔗 github.com/marklearst/diabet… #opensource #diabetes #typescript #CGM #healthtech
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Thoughts on @Airbnb’s new design system?
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🩸 diabetic-utils v1.1.7 is out! Zero-bloat TypeScript utilities for working with diabetic health data: glucose, A1C, time-in-range, and more. 🔄 Updated automated CI/CD pipeline 📚 Enhanced documentation ✅ Improved quality checks Built for devs who want fast, typed calculations without the bloat. Now with better automation and test coverage to keep it clean. 📦 npmjs.com/package/diabetic-u… 💻 GitHub: github.com/marklearst/diabet… #typescript #diabetes #javascript #opensource
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♿️ Just shipped: a11y Companion for Figma! Manual accessibility tracking shouldn’t slow teams down. This widget brings the full @A11YProject checklist into Figma: 60+ checks, async-ready Team facepile (see who checked what) Plain-language WCAG refs & tooltips Free, open source, built for QA/design crits/onboarding Give it a try, report bugs/feature ideas, or fork it for your team! Figma: figma.com/community/widget/1… GitHub: github.com/marklearst/a11y-c… #figma #a11y #accessibility #designsystems #figmawidgets #ux #opensource
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♿️ Just shipped: a11y Companion for Figma! Manual accessibility tracking shouldn’t slow teams down. This widget brings the full @A11YProject checklist into Figma: 60+ checks, async-ready Team facepile (see who checked what) Plain-language WCAG refs & tooltips Free, open source, built for QA/design crits/onboarding Give it a try, report bugs/feature ideas, or fork it for your team! Figma: figma.com/community/widget/1… GitHub: github.com/marklearst/a11y-c… #figma #a11y #accessibility #designsystems #figmawidgets #ux #opensource
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♿️ Just shipped: a11y Companion for Figma! Manual accessibility tracking shouldn’t slow teams down. This widget brings the full @A11YProject checklist into Figma: 60+ checks, async-ready Team facepile (see who checked what) Plain-language WCAG refs & tooltips Free, open source, built for QA/design crits/onboarding Give it a try, report bugs/feature ideas, or fork it for your team! Figma: figma.com/community/widget/1… GitHub: github.com/marklearst/a11y-c… #figma #a11y #accessibility #designsystems #figmawidgets #ux #opensource
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