Wroclaw city centre with churches and buildings on the river

Pierogi covered in pickles, bacon and herbs

An “I love Wroclaw Airport” neon sign

A boat on the river with beautiful buildings behind

I’ve said it a million times and I’ll say it a million more: Poland is so underrated.

Thanks for having me @wrocloverb.com ❤️

I'm very excited about this! Have seen some really significant impact in our tests. With the sizes of websites and JS payloads continuing to increase, this is both important and impactful.

a man in a suit and tie stands in a crowd Alt: Tobias Fünke from Arrested Development shouting “There are dozens of us! Dozens!”

DOZENS!

I could be wrong but I don't believe so. Even if it does work, if you were to do this for every icon on your page (a common use-case for currentColor), you're potentially inflating the DOM significantly.

I'd argue <object> would be a good place for that, like "embed this external SVG as if it was inlined in the document". With <img>, I want an inert image.

A million times this.

So ready for this! ☕ ☕ ☕

A Magic Mouse connected via cable attached to its underneath

"You can connect the Magic Mouse via a USB-to-Lightning cable to a USB switch that toggles between your two Macs."

Yeah... about that, Claude 🙃

It's further perpetuated by agencies who have perverse incentives to ship quickly (no budget for bakeoffs) and bill for the afterwork of fixing their shoddy work.

I've found in-house teams who outsource often lack the skill to properly define performance requirements or accurately assess proposals.

CSS or BS? Think you know CSS? Real property or made-up nonsense? 20 rounds. No mercy.

Rather than the same old boring internet pranks, I thought I'd build something more fun this April Fools.

CSS or BS. Can you tell your CSS properties names from BS?

www.keithcirkel.co.uk/css-or-bs

You guys are making me feel old 👴🏻

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...

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.

There's something quite exciting happening with AVIF and progressive rendering.

Some recent patches let you provide custom 'frames' as progressive passes, so you can provide e.g. smaller blurry versions of the full image to use as a progressive pass.

Even with the bugs this is utterly incredible, bravo 👏

p75 and p90 JavaScript bytes on the web have exploded since May, 2025—easily the largest 10 month period based on HTTP Archive data since 2023.

The long-tail is getting worse, very quickly.

Gemini, what happened in May 2025?

Realised I was talking about behaviour where a <dialog> might be _outside_ the popover element, presumably this works fine?

The behaviour you explained totally makes sense when _inside_ popovers.

I know that's a pretty edge-case implementation (e.g. the tooltip contains an alternative action to the button you've hovered), but I can't imagine why anyone would want a dialog to open but not visible 🤔

In that case I'd expect if I open a dialog from a tooltip, that dialog should become visible and the tooltip should hide.

a close up of a woman 's face with a triangle and a mathematical formula . Alt: A close up of a confused woman's face with mathematical formulae overlaid

Also bless you and others for working on this.

At 2:05, if button 3.2 was instead configured to open a <dialog> via a show-modal command, would that have displayed? Or would that also have become invisible due to the popover from button 3 losing hover state?

new post on my personal blog.

i think these three areas often go unexplained, so hopefully this explains why some of these packages exist. these are fine to exist but the majority of developers shouldn't have to pay the cost for them.

Buzzing for this one!

Snap him up

I've been waiting for _years_ on this feature.

Thank you Kevin for taking this one on, working with the CSS WG along the way, and congrats on shipping! 👏

(Next up: nudge Firefox and Safari to add this as well …)

Build for the Web, Build on the Web, Build With the Web Every layer of abstraction made in the browser moves you further from the platform, ties you further into framework lock-in, and moves you further away &hellip;

Slides from my #WebDayOut talk, ‘Build for the Web, Build on the Web, Build With the Web’. Incredibly proud of this one.

speakerdeck.com/csswizardry/...

Yeah, you can of course inline a <script> which dynamically imports the polyfill too. `supports` would be great for preloads though, like "I want the polyfill for invoker commands to arrive ASAP but only if it's actually needed"

Not looked at the slides yet but this is why I'd love to see some kind of `<script supports>` attribute (believe there was an equivalent `when` attribute proposed for stylesheets)... would mean polyfills could naturally uninstall themselves.

“WordPress is faster by accident than SPAs are on purpose” @csswizardry.com #webDayOut

Ditto, the UK conference scene feels so strong this year and I can't get to them all 😔

Code example showing the usage of Temporal.ZoneddateTime ```js // London DST starts: 2026-03-29 01:00 -> 02:00 const zdt = Temporal.ZonedDateTime.from( "2026-03-29T00:30:00+00:00[Europe/London]", ); console.log(zdt.toString()); // → "2026-03-29T00:30:00+00:00[Europe/London]" const plus1h = zdt.add({ hours: 1 }); console.log(plus1h.toString()); // "2026-03-29T02:30:00+01:00[Europe/London]" (01:30 doesn't exist) ```

Temporal is now Stage 4 at TC39 🎂🎂🎂

Thanks to all the other champions of JavaScript's new date-time API. It has been a wild ride over many years!

I wrote a blog post explaining how we got here 📜

bloomberg.github.io/js-blog/post...