Tags: css

Every week of June sees me at a web event, but in a different capacity each time.

At the end of the first full week in June, I went to CSS Day in Amsterdam as an attendee. It was thought-provoking, as always. And it was great to catch up with my front-of-the-front-end friends.

Last week I went to Pixel Pioneers in Bristol as a speaker. Fortunately I was on first so I was able to get the speaking done with and enjoy the rest of the talks. It was a lovely little event and there was yet more catching up with old friends and making new ones.

This week is the big one. UX London is happening this week. This time I’m not there as an attendee or a speaker. I’m there as the curator and host.

On the one hand, I’m a bag of nerves. I’ve been preparing for this all year and now it’s finally happening. I keep thinking of all the things that could possibly go wrong.

On the other hand, I’m ridiculously excited. I know I should probably express some modesty, but looking at the line-up I’ve assembled, I feel an enormous sense of pride. I’m genuinely thrilled at the prospect of all those great talks and workshops.

Nervous and excited. Those are the two wolves inside me right now.

If you’re going to be at UX London, I hope that you’re equally excited (and not nervous). There are actually still some last-minute tickets available if you haven’t managed to get one yet.

See you there!

I first spoke at CSS Day in Amsterdam back in 2016. Well, technically it was the HTML Day preceding CSS Day, when I talked about the A element. I spoke at CSS Day again last year, when I gave a presentation about alternative histories of styling.

One of the advantages to having spoken at the event in the past is that I’m offered a complementary ticket to the event every year. That’s an offer I’ve made the most of.

I’ve just returned from the latest iteration of CSS Day. It was, as always, excellent. I’ve said it before and I’ll say it again, but I just love the way that this event treats CSS with the respect it deserves. I always attend thinking “I know CSS”, but I always leave thinking “I learned a lot about CSS!”

The past few years have been incredibly exciting for the language. We’ve been handed feature after feature, including capabilities we were told just weren’t possible: container queries; :has; cascade layers; view transitions!

As Paul points out in his write-up, there’s been a shift in how these features feel too. In the past, the feeling was “there’s some great stuff arriving and it’ll be so cool once we’ve got browser support.” Now the feeling is finally catching up to the reality: these features are here now. If browser support for an exciting feature is still an issue, wait a few weeks.

Mind you, as Paul also points out, maybe that’s down to the decreased diversity in rendering engines. If a feature ships in Chromium, Webkit, and Gecko, then it’s universally supported. On the one hand, that’s great for developers. But on the other hand, it’s not ideal for the ecosystem of the web.

Anyway, as expected, there was a ton of mind-blowing stuff at CSS Day 2023. Most of the talks were deep dives into specific features. Those deep dives were bookended by big-picture opening and closing talks.

Manuel closed out the show by talking about he’s changing the way he writes and thinks about CSS. I think that’s a harbinger of what’s to come in the next year or so. We’ve had this wonderful burst of powerful new features over the past couple of years; I think what we’ll see next is consolidation. Understanding how these separate pieces play well together is going to be very powerful.

Heck, just exploring all the possibilities of custom properties and :has could be revolutionary. When you add in the architectural implications of cascade layers and container queries, it feels like a whole new paradigm waiting to happen.

That was the vibe of Una’s opening talk too. It was a whistle-stop tour of all the amazing features that have already landed, and some that will be with us very soon.

But Una also highlighted the heartbreaking disparity between the brilliant reality of CSS in browsers today versus how the language is perceived.

Look at almost any job posting for front-end development and you’ll see that CSS still isn’t valued as its own skill. Never mind that you could specialise in a subset of CSS—layout, animation, architecture—and provide 10× value to an organisation, the recruiters are going to play it safe and ask you if you know React.

Rachel Nabors and I were chatting about this gap between the real and perceived value of modern CSS. She astutely pointed out that CSS is kind of a victim of its own resilience. The way you wrote CSS ten years ago still works, and will continue to work. That’s by design. Yes, you can write much better, more resilient CSS today, but if those qualities aren’t valued by an organisation, then you’re casting your pearls before swine.

That said, it’s also true that the JavaScript you wrote ten years ago also continues to work today and will continue to work in the future. So why is it that devs seem downright eager to try the latest JavaScript hotness but are reluctant to use CSS that’s been stable for years?

Or perhaps that’s not an accurate representation of the JavaScript ecosystem. It may well be that the eagerness only extends to libraries and frameworks. There’s reluctance to embrace native JavaScript APIs like Proxy or web components. There’s a weird lack of trust in web standards, and an underserved faith in third-party libraries.

Una speculated that CSS needs a rebranding, like we did back in the days of CSS3, a term which didn’t have any technical meaning but helped galvinise excitement.

I’m not so sure. A successful rebranding today becomes a millstone tomorrow. Again, see CSS3.

Una finished with a call-to-action. Let’s work on building the CSS community.

She compared the number of “front-end” conferences dedicated to JavaScript—over 50 listed on one website—to the number of conferences dedicated to CSS. There’s just one. CSS Day.

Heydon wrote:

It occurs to me there are two types of web conferences: know-your-craft conferences and get-ahead conferences. It’s no coincidence there are simultaneously more get-ahead conferences and more JS-framework conferences.

Una encouraged us to organise more gatherings. It doesn’t need to be a conference. It could just be a local meet-up.

I think that’s an excellent suggestion. As Manuel puts it:

My biggest takeaway: The CSS community needs you!

For me, the value of CSS Day was partly in the excellent content being presented, but it was also in the opportunity to gather with like-minded individuals and realise I’m not alone. It’s also too easy to get gaslit by the grift of “modern web development”, which seems to be built on a foundation of user-hostile priorities that don’t make sense to me—over-engineering, intertwingling of concerns, and developer experience über alles. CSS Day was a welcome reminder to fuck that noise.

While I’m talking about the SVGs on The Session, I thought I’d share something else related to the rendering of the sheet music.

Like I said, I use the brilliant abcjs JavaScript library. It converts ABC notation into sheet music on the fly, which still blows my mind.

If you view source on the rendered SVG, you’ll see that the path and rect elements have been hard-coded with a colour value of #000000. That makes sense. You’d want to display sheet music on a light background, probably white. So it seems like a safe assumption.

Ah, but when it comes to front-end development, assumptions are like little hidden bombs just waiting to go off!

I got an email the other day:

Hi Jeremy,

I have vision problems, so I need to use high-contrast mode (using Windows 11). In high-contrast mode, the sheet-music view is just black!

Doh! All my CSS adapts just fine to high-contrast mode, but those hardcoded hex values in the SVG aren’t going to be affected by high-contrtast mode.

Stepping back, the underlying problem was that I didn’t have a full separation of concerns. Most of my styling information was in my CSS, but not all. Those hex values in the SVG should really be encoded in my style sheet.

I couldn’t remove the hardcoded hex values—not without messing around with JavaScript beyond my comprehension—so I made the fix in CSS:

[fill="#000000"] {
  fill: currentColor;
}
[stroke="#000000"] {
  stroke: currentColor;
}

That seemed to do the trick. I wrote back to the person who had emailed me, and they were pleased as punch:

Well done, Thanks!  The staff, dots, etc. all appear as white on a black background.  When I click “Print”, it looks like it still comes out black on a white background, as expected.

I’m very grateful that they brought the issue to my attention. If they hadn’t, that assumption would still be lying in wait, preparing to ambush someone else.

Two weeks ago, I wrote:

I woke up today to a very annoying new bug in Firefox. The browser shits the bed in an unpredictable fashion when rounding up single pixel line widths in SVG. That’s quite a problem on The Session where all the sheet music is rendered in SVG. Those thin lines in sheet music are kind of important.

Paul Rosen, who makes abcjs, the JavaScript library that renders sheet music on The Session, managed to get a fix out pretty quickly. But I use an older version of the library and updating it would introduce some side-effects that would take me a while to work around. So that option wasn’t available to me.

In this situation, when the problem is caused by a browser bug, the correct course of action is to file a bug with the browser. That had already been done. Now all I could do was twiddle my thumbs and wait for the next release of the browser, which would hopefully ship with the fix.

But I figured I may as well try to find a temporary workaround in the meantime.

At first, I looked at diving into the internals of the JavaScript—that’s where the instructions are given for drawing the SVGs.

But then I stopped and thought, “If the problem is with the rendering of the SVG, maybe CSS can help.”

I started messing around with SVG-specific CSS properties like stroke, fill, and so on. With dev tools open, I started targeting the paths that acted as bar lines in the sheet music, playing around with widths, opacities, and fills.

It was the debugging equivalent of throwing spaghetti at the wall. Remarkably, it actually worked.

I found a solution with this nonsensical bit of CSS:

stroke: currentColor;
stroke-opacity: 0;

For some reason, rather than making all the barlines disappear, this ensured they were visible.

It’s the worst kind of hacky fix—the kind where you have no idea why it works, but it does.

So I shipped it.

And at pretty much exactly the same time, a new version of Firefox dropped …with the bug fixed.

I can’t deny that there was a certain satisfaction in being able to work around a browser bug. But there’s much more satisfaction in deleting the hacky workaround when it’s no longer needed.