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Simon Pieters @zcorpan.bsky.social · 29/05/2026

No wait, wheel is passive by default. OK I see non-passive prevents scrolling... software.hixie.ch/utilities/js...

software.hixie.ch

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Simon Pieters @zcorpan.bsky.social · 29/05/2026

It *can* prevent scrolling but it doesn't have to. The value is changed regardless. software.hixie.ch/utilities/js...

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Simon Pieters @zcorpan.bsky.social · 29/05/2026

passive: false means not passive. But it seems the bug returns if there's a `wheel` event listener, regardless of passive.

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Simon Pieters @zcorpan.bsky.social · 21/05/2026

Interesting! Have you thought about history navigation (and bfcache)?

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Mat “Wilto” Marquis @wil.to · 07/04/2026

I had no idea that the subject of the RICG’s canonical responsive images examples endured in the specification to this very day:

Cropped screenshot of the HTML specification. Relevant visible content reads:

The srcset and sizes attributes can be used, using the w descriptor, to provide multiple images that only vary in their size (the smaller image is a scaled-down version of the bigger image).

In this example, a banner image takes up the entire viewport width (using appropriate CSS).

<h1><img sizes="100vw" srcset="wolf-400.jpg 400w, wolf-800.jpg 800w, wolf-1600.jpg 1600w"
src="wolf-400.jpg" alt="The rad wolf"></h1>

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Scott Jehl @scottjehl.com · 30/03/2026

New on the Squarespace Engineering Blog! Squarespace & Web Standards: How We Helped Bring HTML Video & Audio Lazy-Loading to Today’s Browsers. I'm real proud of the teamwork that went into this. Stay tuned for part 2 next week, which will cover dev best practices for using this new HTML standard.

engineering.squarespace.com

Squarespace & Web Standards: How We Helped Bring HTML Video & Audio Lazy Loading to Today’s Browsers — Squarespace Engineering Blog

At Squarespace, many of our core products are built on web standards, and our engineers are constantly pushing the boundaries of the web’s capabilities. Occasionally, those boundaries reveal a limitat...

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Simon Pieters @zcorpan.bsky.social · 31/03/2026

> WHATWG, who took over responsibilities from the W3C in 2019. Arguably in 2004. :) html.spec.whatwg.org/multipage/in...

html.spec.whatwg.org

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Firefox for Web Developers @webdevs.firefox.com · 12/02/2026

It's time for Interop 2026! This is a cross-browser effort where we agree on a set of focus areas to improve compatibility. Here's how things went in 2025, and what we're taking on for 2026: hacks.mozilla.org/2026/02/laun...

hacks.mozilla.org

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Simon Pieters @zcorpan.bsky.social · 29/01/2026

Does the XSLT implementation support `disable-output-escaping="yes"`?

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Simon Pieters @zcorpan.bsky.social · 28/01/2026

Or using HTML syntax at the edges (parse and serialize) but XML tools in the middle

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Noam Rosenthal @nomster.bsky.social · 28/01/2026

Is anybody still using xml/HTML polyglots for anything moder (Syntax that is valid in both html and xml) Wondering whether those are something that needs to be considered for future HTML enhancement or a thing of the past...

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Simon Pieters @zcorpan.bsky.social · 07/01/2026

Testing with software.hixie.ch/utilities/js... canShare returns false but text and url actually work on Android. So... shipping on Android at least, but there are bugs.

software.hixie.ch

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Simon Pieters @zcorpan.bsky.social · 30/10/2025

Maybe it's not the fastness that lowers the conversion rate, but something else, like maybe the fastest websites are more likely to have not-so-great design?

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Simon Pieters @zcorpan.bsky.social · 18/09/2025

Accept cookies! Subscribe to our newsletter for 15% off! Hey, do you want to take a survey of how much you like our website?

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Stacy Kvernmo @stacykvernmo.com · 05/09/2025

We mentioned on Winging It that we might show some of our favorite browser tips. Here's one of many that I find delightful. If you are working with shape-outside, then Firefox has a great path editor. I made a quick video to show how it works.

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Simon Pieters @zcorpan.bsky.social · 08/09/2025

i a i n ' t r e a d i n g a l l t h a t i m h a p p y f o r y o u t h o o r s o r r y t h a t h a p p e n e d

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Jake Archibald @jakearchibald.com · 04/09/2025

Interop 2026 is now open for proposals! This is your chance to tell browser-makers which well-defined, well-tested features you wish had better support across browsers. ⬇️ Here's how ⬇️ github.com/web-platform...

github.com

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Simon Pieters @zcorpan.bsky.social · 27/08/2025

Not saying you should but it should work

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Simon Pieters @zcorpan.bsky.social · 27/08/2025

Or <script xmlns="http://www.w3.org/1999/xhtml" src="..."/>! If there's at least one element in a known namespace, browsers switch away from the XML tree view.

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Simon Pieters @zcorpan.bsky.social · 27/08/2025

Right, though ARIA attributes are superglobal.

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Simon Pieters @zcorpan.bsky.social · 27/08/2025

Needs bugs.webkit.org/show_bug.cgi...

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Simon Pieters @zcorpan.bsky.social · 27/08/2025

Did you know? You can style XML with CSS using <?xml-stylesheet href="style.css"?>

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Jake Archibald @jakearchibald.com · 22/08/2025

Yay! It's the first Firefox release since I've joined the team, so let's take a look at some of the new developer-facing features in Firefox 142… 🧵

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Simon Pieters @zcorpan.bsky.social · 20/08/2025

In your demo, the relevant element is a flex item, which is not inline. Here's a demo showing that actual inline doesn't work: software.hixie.ch/utilities/js...

software.hixie.ch

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Simon Pieters @zcorpan.bsky.social · 20/08/2025

The part about display: inline is wrong. This: > establishes an inline formatting context and thus contains only inline-level boxes. Refers to what the element contains. A block box establishes an inline formatting context when it has no block-level children. The element itself is still a block.

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Simon Pieters @zcorpan.bsky.social · 19/08/2025

Sure. People used to call it XHTML. :) If there's an element in a known namespace browsers will apply the UA stylesheet. If you add a script element it will run (if scripting is enabled). I don't know if feed readers will get confused though.

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Ben Schwarz @benschwarz.bsky.social · 21/07/2025

Want to build faster websites? Here's how: - Learn how browsers parse, layout & paint - Treat JS as a tool, not the foundation(!) - Favor static HTML or server side rendering at all times - Use Core Web Vitals alongside other metrics to learn shortfalls, improve and iterate Then keep doing that.

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Simon Pieters @zcorpan.bsky.social · 19/08/2025

It seems to me you should be able to use <script xmlns="http://www.w3.org/1999/xhtml" src="polyfill.js"/>

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Simon Pieters @zcorpan.bsky.social · 18/08/2025

Let's apply the same logic to rendering images, video and audio...

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👻BOOryan BlessDeAd🎃 @bryb.bsky.social · 17/08/2025

I don't know why this lad is building a subterranean city for cats, but I'm all for it.

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Sam Rose @samwho.dev · 17/08/2025

Email addresses are very simple, and you will score highly in this quiz. e-mail.wtf

e-mail.wtf

Email is Easy

Everyone knows what an email address is, right?

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Simon Pieters @zcorpan.bsky.social · 06/08/2025

Yes. Remove it, Bruce! I know you can do it!

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Simon Pieters @zcorpan.bsky.social · 06/08/2025

I've never used LinkedIn No ragrets

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Simon Pieters @zcorpan.bsky.social · 06/08/2025

It's a bogus comment. html.spec.whatwg.org#end-tag-open...

html.spec.whatwg.org

HTML Standard

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Alex Russell @infrequently.org · 25/06/2025

wait...it's up! gitnation.com/contents/the-new…

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Keith Cirkel @keithamus.social · 17/06/2025

Okay gang, those who sling HTML, CSS, JS, which _Firefox_ bugs are blocking you? Which features do you think need improving? What new features would you like to see? What work would you prioritise? Big or small, bonus points for linking to a bug (even more for filing bugs then linking them)!

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Chris Coyier @chriscoyier.net · 05/06/2025

“You might be familiar with SPAs, and MPAs, or actually RFWS ( Regular Fucking Web Sites)” — @cydstumpel.nl #CSSDay

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Simon Pieters @zcorpan.bsky.social · 05/06/2025

The effect should be the same as removing from the spec, since anything not in the spec must not be used by authors (unless allowed by some other spec).

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Simon Pieters @zcorpan.bsky.social · 04/06/2025

Should we remove it from the spec? html.spec.whatwg.org#attr-meta-ht...

html.spec.whatwg.org

HTML Standard

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Keith Cirkel @keithamus.social · 28/05/2025

Hey friends, did you know you can make a modal <dialog> element dismissible by clicking outside (aka light dismiss) by adding `closedby=any` to it. That's it. That's all there is to it. <dialog closedby=any> developer.mozilla.org/en-US/docs/W... Chrome 134+, Firefox 140+, coming soon to Safari.

developer.mozilla.org

HTMLDialogElement: closedBy property - Web APIs | MDN

The closedBy property of the HTMLDialogElement interface indicates the types of user actions that can be used to close the associated <dialog> element. It sets or returns the dialog's closedby attribu...

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