 Apple Evangelist on the Web Developer Experience team for Safari & Webkit. #PwMEhttps://bsky.app/profile/jensimmons.bsky.socialhttps://bsky.app/profile/jensimmons.bsky.social/post/3mixiomiahc2eBecoming “obsessed” with Covid in late Jan/early Feb 2020 is not “before the rest of the world” — unless you believe the only country in the world that matters is the U.S. Literally billions of people knew then. Claiming GENIUS for simply watching news from Asia is peak white American superiority.08 Apr 2026 04:52 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mixiomiahc2ehttps://bsky.app/profile/jensimmons.bsky.social/post/3mimwgmzwtc2xUsing Claude Code feels like playing SimCity.03 Apr 2026 23:58 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mimwgmzwtc2xhttps://bsky.app/profile/jensimmons.bsky.social/post/3mimvwji36s2xSafari 26.5 beta is out! Includes: • `:open` pseudo-class for `<details>`, `<dialog>`, `<select>`, and `<input>` elements • `color-interpolation` attribute on SVG gradients, enabling `linearRGB` color spaces • `source` property on `ToggleEvent` • Origin API https://developer.apple.com/documentation/safari-release-notes/safari-26_5-release-notes03 Apr 2026 23:49 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mimvwji36s2xhttps://bsky.app/profile/jensimmons.bsky.social/post/3mht3nhzfkc2eSafari 26.4 is here! https://webkit.org/blog/17862/webkit-features-for-safari-26-4/ Grid Lanes. WebTransport. Keyboard Lock API. And _tons_ of fixes & improvements. Please read the introduction to our article to learn what we’ve been up to…24 Mar 2026 17:22 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mht3nhzfkc2ehttps://bsky.app/profile/jensimmons.bsky.social/post/3mht3nhzfkc2eSafari 26.4 is here! https://webkit.org/blog/17862/webkit-features-for-safari-26-4/ Grid Lanes. WebTransport. Keyboard Lock API. And _tons_ of fixes & improvements. Please read the introduction to our article to learn what we’ve been up to…24 Mar 2026 17:22 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mht3nhzfkc2ehttps://bsky.app/profile/jensimmons.bsky.social/post/3mfsexa4muc2qDid you see what’s in Safari Technology Preview 238?! * Customizable <select> * Scroll anchoring * The :open pseudo-class * Threaded animations * JSPI for WebAssembly and more — including fixes for SVG, tables, WebRTC… https://webkit.org/blog/17848/release-notes-for-safari-technology-preview-238/26 Feb 2026 23:46 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mfsexa4muc2qhttps://bsky.app/profile/jensimmons.bsky.social/post/3mf3tjiamds2yWhat do these API have in common? * WebTransport * Keyboard Lock API * Grid Lanes w/ flow-tolerance * Threaded scroll-driven animations * WebAuthn PRF extension * ReadableByteStream * Blob.stream() with BYOB reader * Name-only @container queries * min(), max(), and clamp() in <img> sizes attribute18 Feb 2026 00:35 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mf3tjiamds2yhttps://bsky.app/profile/jensimmons.bsky.social/post/3mezfno3iek22Did you see? The first beta of Safari 26.4 is out today. What’s most exciting to you as a person making websites/apps? https://developer.apple.com/documentation/safari-release-notes/safari-26_4-release-notes17 Feb 2026 01:22 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mezfno3iek22https://bsky.app/profile/jensimmons.bsky.social/post/3mes3rvelgs2p@kevinpowell.co I’m listening to your podcast episode about Interop 2026. Congrats on getting it out so soon! I hear you wondering about “Dialogs & Popovers” support in Safari. It’s wrong to think that means our implementation of dialog and popover is poor. Nope! The focus area name is confusing 🤪14 Feb 2026 03:37 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mes3rvelgs2phttps://bsky.app/profile/jensimmons.bsky.social/post/3meoi4obfqk2xInterop 2026 launches today! If you want know on what it includes and what it means for web development — our article provides all the details. https://webkit.org/blog/17818/announcing-interop-2026/ Focus areas include Anchor Positioning, Style Queries, contrast-color(), WebTransport and much, much more.12 Feb 2026 17:07 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3meoi4obfqk2xhttps://bsky.app/profile/jensimmons.bsky.social/post/3memaqy5wds2uI’m seeing so much about LLMs in my feed today. Web designers and developers — how are you feeling about AI and what it means for your work? Are you using the tools? How? What’s changing? How do you expect AI to be used in the future for making websites & web apps?11 Feb 2026 19:50 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3memaqy5wds2uhttps://bsky.app/profile/jensimmons.bsky.social/post/3mem7gtvs222zSafari 26.3 is here with Zstandard file compression, Navigation API’s AbortSignal for better control in single-page apps, and fixes for anchor positioning, multi-column layouts, & more. Plus fullscreen video now dims surroundings in visionOS. webkit.org/blog/17798/webkit-features-for-safari-26-3/ https://webkit.org/blog/17798/webkit-features-for-safari-26-3/11 Feb 2026 19:26 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mem7gtvs222zhttps://bsky.app/profile/jensimmons.bsky.social/post/3mdyepfflvc2eAre you using CSS Grid? If you write CSS & code layouts on the web, and not using Grid — why not?!? I see so many sites that still use only Flexbox for 100% of their layout. 0% Grid. Why? What would help? I hear people say it’s hard. Is it? What’s hard? What do you want to learn about CSS Grid?03 Feb 2026 22:07 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3mdyepfflvc2ehttps://bsky.app/profile/jensimmons.bsky.social/post/3md4pnck4b22mIt’s wild to me just how much wrong information there is out there (written by humans in the later half of 2025) about using CSS to create masonry layouts. There is no property named `grid-lanes` (as in grid-lanes: repeat(4, 200px)). There is no `masonry-direction` property. Or `masonry` anything.23 Jan 2026 22:08 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3md4pnck4b22mhttps://bsky.app/profile/jensimmons.bsky.social/post/3md27l7gli22gExcited about CSS Grid Lanes? Wondering when you can start using it? We’ve got you covered. Updates on browser implementations + strategies for progressive enhancement. https://webkit.org/blog/17758/when-will-css-grid-lanes-arrive-how-long-until-we-can-use-it/22 Jan 2026 22:15 +0000at://did:plc:qowvsajlaoyhzuesk37edcvj/app.bsky.feed.post/3md27l7gli22g