What type is a CSS counter? There is no type <counter>. It sure as hell isn't an <integer> (that's what I want, but it seems there's no easy way of converting it) or a <number>. <string>? Something else? No type at all? I am learning to hate counters.

Reminder: ticket prices will go up by €100 + VAT this Wednesday, 1st of July. There are a few cheap tickets left. We also announced @patmeenan.com, @stephaniewalter.bsky.social and @programmingart.bsky.social (MC). perfnow.nl/tickets.html

Remember: ticket prices will go up by €100 + VAT next Wednesday, 1st of July. Grab your cheap tickets while you can. perfnow.nl/tickets.html

Given that it's World Cup time I decided orange is the correct choice.

I seem to have gone over to @eurosky.social with few problems except for an unclear interface.

Related to the recent "what-did-Chrome-do-shipping-all-these-ugly-interest-invokers-they-must-be-evil-oh-wait-no-i-think-i-have-the-experimental-flag-set" flap: [1/2]

First Doom, now Quake. Next year we could fill a CSS gaming corner somewhere.

Once AI goes down, what do we *want* to happen? Ethan asks.

maybe he didn’t read the conference programme had his Agent summarize it instead 🫠

Or this #cssday feedback: "Too many white people, too many men. Too many of the same people that always speak." If you feel that way, why come at all?

So my current theory is that from time immemorial CSS devs got used to content-based layouts such as tables, floats, and flexbox. Then grid came, and it's not based on the content of the items. That's why it's considered confusing or "I already use flexbox so I don't need grid." [1/2]

Yes, that's it. grid-lanes are the ultimate unordered list. You can't predict the order. #cssday

Praise be unto the cascade.

I find myself in a church. Why? Have I been put here for a reason? Is there a deeper purpose to my presence?

Oh look, they removed all old ,lost and vague bikes from the rack in front of my house and left … only mine?

@cssday.nl speakers. As always, an amazing lineup. Looking forward to the talks. Sketchnotes at the ready. @bram.us @html5test.com @jakearchibald.com @joshtumath.uk @kevinpowell.co @lea.verou.me @matuzo.at @meyerweb.com @nerdy.dev @patrickbrosset.com @rebane2001.bsky.social @sjoy.lol @una.im

We still have a few tickets left. Maybe come off your fence and join us next week? cssday.nl/tickets.html

Well, we've got a speaker change. @csswizardry.com is unable to make it due to a weird combination of circumstances. Fortunately we found @bram.us willing to take his place. The schedule has been updated to reflect this. cssday.nl/schedule.html

And they feel totally relaxed about the whole situation. That's so great.

And they have a solid grasp on the practicalities of the conference.

They will never be late in preparing the best talks for our audience.

We're fortunate to have such experienced, professional speakers.

Well, I just went to the final Ancient Greek reading night of my old teacher. We did some Sophokles and a poem of Theokritos. But it was the last time ... and fittingly, Theokritos ended with a farewell. Not happy. Still, glad to have been there all those years. End of an era.

Blog post: Grid algorithm adventures https://quirksmode.org/quirksblog/2026/0527-gridalgo.html I explain a bit of grid theory, a simplified grid algorithm, and how the noble art of not giving too many instructions is best for creating robust layouts. Rambles slightly.

Am I right that it's not possible to convert a string to a number or counter in CSS, or a number or counter to a string?

If you have a special diet, make sure we know about it this week. On Friday night we're going to send the special diet list to the caterer, and it will be locked down. Check your diet on your attendee page. Vegetarian options will be available throughout; it does not count as special. cssday.nl

Six early-bird tickets left. Will they run out today? Or are you feeling lucky and wait for Monday? perfnow.nl/tickets.html

"Teeth of d'Artagnan of Four Mustekeer fame held hostage by retired city archeologist gone rogue" is not the headline I expected today.

Ticket sales are open! perfnow.nl/tickets.html

Is there a closely-guarded secret to using <dialog> in Safari? Or is it just not working?

❓ A question for web developers ❓ If you do layout in CSS, what's missing? I'm especially interested in hearing about use cases that aren't yet solved by existing CSS layout features. #css #webdev

Why is a strikethrough called a line-through in CSS? It's been like that since at least 1998, but I forget every time I need it.

Working on my talk for @cssday.nl and I just realized it's less than a month away. Not panic time yet, but it's coming fast 😅 Also, early bird pricing ends today, so if you don't have your ticket yet, now's the time! cssday.nl

RE: https://front-end.social/@html5test/116567074336744419 Only at CSS Day! https://cssday.nl

Only at CSS Day! cssday.nl

It is spelled Custom Properties but pronounced CSS variables. It’s British like Leicestershire. Don’t think about it. Similarly Custom Elements are pronounced “web components”

Reminder: On 14th of May CSS Day ticket prices will go up by €75 + VAT. Want to come to cssday.nl ? Ordering now is cheaper than ordering later. See you in June,

We just sent out a TEST MAIL to our mailing list. Last year quite a few people didn't see the announcement mail and missed the early bird ticket sale. So this year we run a test first. If you're subscribed to our mailing list, please make sure you got the test mail. Or perfnow.nl/subscribe

I’ll just leave this here for now. viewportconf.org #web #conference

I forgot I created an entire media query test suite. Wouldn't be too hard to expand it with a container query test suite. https://www.quirksmode.org/css/mediaqueries/mobile.html

Is the email system breaking down? Just now I went to an art gallery and a board game shop, and both proprietors complained that their mails never arrive any more. Coming home, I discovered a mail I was expecting for days in my spam box, while there was no reason for doing so. [1/2]

The second part of my column-filled grid idea: why the original idea doesn't work very well but is nonetheless the least bad option right now. https://www.quirksmode.org/quirksblog/2026/0507-cfg2.html

So I was supposed to answer some Very Important Emails, go shopping, and do a bunch of stupid admin stuff around the conferences ... ... but instead I'm coding a silly effect for the performance.now() home page. Technically counts as conference work, but ...

New blog post: https://quirksmode.org/quirksblog/2026/0505-cfg1.html

Oh look, the #cssday speakers are starting to cooperate to bring DOOM to our audience. front-end.social/@bramus/1165...

Well, I've got a version of my grid article, the one I asked so many questions for lately. It'll likely be a two-parter, with an extra posting about the inner workings of grid.

Reminder: TODAY is the last day you can buy tickets by invoice. From tomorrow on only Stripe payments are possible. cssday.nl/tickets.html

What I want to achieve is this. I have in fact achieved it. But it requires me to explain - the grid filling algorithm - debugging via counters [1/3]

I just realised there's an easier way of doing the little grid technique I've been working on for the past 24 hours. Back to the drawing board.

The following works in Chrome and Safari, but not in Firefox. maxColumns is always 0. Why? --containerWidth: calc(100cqw - var(--padding) * 2); --maxColumns: round(down,calc(var(--containerWidth) / var(--size)));