Tags: pr



Thursday, April 18th, 2019

Inlining SVG background images in CSS with custom properties

Here’s a tiny lesson that I picked up from Trys that I’d like to share with you…

I was working on some upcoming changes to the Clearleft site recently. One particular component needed some SVG background images. I decided I’d inline the SVGs in the CSS to avoid extra network requests. It’s pretty straightforward:

.myComponent {
    background-image: url('data:image/svg+xml;utf8,<svg> ... </svg>');

You can basically paste your SVG in there, although you need to a little bit of URL encoding: I found that converting # to %23 to was enough for my needs.

But here’s the thing. My component had some variations. One of the variations had multiple background images. There was a second background image in addition to the first. There’s no way in CSS to add an additional background image without writing a whole background-image declaration:

.myComponent--variant {
    background-image: url('data:image/svg+xml;utf8,<svg> ... </svg>'), url('data:image/svg+xml;utf8,<svg> ... </svg>');

So now I’ve got the same SVG source inlined in two places. That negates any performance benefits I was getting from inlining in the first place.

That’s where Trys comes in. He shared a nifty technique he uses in this exact situation: put the SVG source into a custom property!

:root {
    --firstSVG: url('data:image/svg+xml;utf8,<svg> ... </svg>');
    --secondSVG: url('data:image/svg+xml;utf8,<svg> ... </svg>');

Then you can reference those in your background-image declarations:

.myComponent {
    background-image: var(--firstSVG);
.myComponent--variant {
    background-image: var(--firstSVG), var(--secondSVG);

Brilliant! Not only does this remove any duplication of the SVG source, it also makes your CSS nice and readable: no more big blobs of SVG source code in the middle of your style sheet.

You might be wondering what will happen in older browsers that don’t support CSS custom properties (that would be Internet Explorer 11). Those browsers won’t get any background image. Which is fine. It’s a background image. Therefore it’s decoration. If it were an important image, it wouldn’t be in the background.

Progressive enhancement, innit?

Saturday, April 13th, 2019

Goodbye Google Analytics, Hello Fathom - daverupert.com

Dave stops feeding his site’s visitors data to Google. I wish more people (and companies) would join him.

There’s also an empowering #indieweb feeling about owning your analytics too. I pay for the server my analytics collector runs on. It’s on my own subdomain. It’s mine.

Friday, April 12th, 2019

Disenchantment - Tim Novis

I would urge front-end developers to take a step back, breathe, and reassess. Let’s stop over engineering for the sake of it. Let’s think what we can do with the basic tools, progressive enhancement and a simpler approach to building websites. There are absolutely valid usecases for SPAs, React, et al. and I’ll continue to use these tools reguarly and when it’s necessary, I’m just not sure that’s 100% of the time.

Thursday, April 11th, 2019

Accessibility Events | CSS-Tricks

If you’re using Apple’s VoiceOver, both your phone and your computer will broadcast your assumed disability to the entire internet, unless and until you specifically tell it to stop.

Wednesday, April 10th, 2019


When I talk about evaluating technology for front-end development, I like to draw a distinction between two categories of technology.

On the one hand, you’ve got the raw materials of the web: HTML, CSS, and JavaScript. This is what users will ultimately interact with.

On the other hand, you’ve got all the tools and technologies that help you produce the HTML, CSS, and JavaScript: pre-processors, post-processors, transpilers, bundlers, and other build tools.

Personally, I’m much more interested and excited by the materials than I am by the tools. But I think it’s right and proper that other developers are excited by the tools. A good balance of both is probably the healthiest mix.

I’m never sure what to call these two categories. Maybe the materials are the “external” technologies, because they’re what users will interact with. Whereas all the other technologies—that mosty live on a developer’s machine—are the “internal” technologies.

Another nice phrase is something I heard during Chris’s talk at An Event Apart in Seattle, when he quoted Brad, who talked about the front of the front end and the back of the front end.

I’m definitely more of a front-of-the-front-end kind of developer. I have opinions on the quality of the materials that get served up to users; the output should be accessible and performant. But I don’t particularly care about the tools that produced those materials on the back of the front end. Use whatever works for you (or whatever works for your team).

As a user-centred developer, my priority is doing what’s best for end users. That’s not to say I don’t value developer convenience. I do. But I prioritise user needs over developer needs. And in any case, those two needs don’t even come into conflict most of the time. Like I said, from a user’s point of view, it’s irrelevant what text editor or version control system you use.

Now, you could make the argument that anything that is good for developer convenience is automatically good for user experience because faster, more efficient development should result in better output. While that’s true in theory, I highly recommend Alex’s post, The “Developer Experience” Bait-and-Switch.

Where it gets interesting is when a technology that’s designed for developer convenience is made out of the very materials being delivered to users. For example, a CSS framework like Bootstrap is made of CSS. That’s different to a tool like Sass which outputs CSS. Whether or not a developer chooses to use Sass is irrelevant to the user—the final output will be CSS either way. But if a developer chooses to use a CSS framework, that decision has a direct impact on the user experience. The user must download the framework in order for the developer to get the benefit.

So whereas Sass sits at the back of the front end—where I don’t care what you use—Bootstrap sits at the front of the front end. For tools like that, I don’t think saying “use whatever works for you” is good enough. It’s got to be weighed against the cost to the user.

Historically, it’s been a similar story with JavaScript libraries. They’re written in JavaScript, and so they’re going to be executed in the browser. If a developer wanted to use jQuery to make their life easier, the user paid the price in downloading the jQuery library.

But I’ve noticed a welcome change with some of the bigger JavaScript frameworks. Whereas the initial messaging around frameworks like React touted the benefits of state management and the virtual DOM, I feel like that’s not as prevalent now. You’re much more likely to hear people—quite rightly—talk about the benefits of modularity and componentisation. If you combine that with the rise of Node—which means that JavaScript is no longer confined to the browser—then these frameworks can move from the front of the front end to the back of the front end.

We’ve certainly seen that at Clearleft. We’ve worked on multiple React projects, but in every case, the output was server-rendered. Developers get the benefit of working with a tool that helps them. Users don’t pay the price.

For me, this question of whether a framework will be used on the client side or the server side is crucial.

Let me tell you about a Clearleft project that sticks in my mind. We were working with a big international client on a product that was going to be rolled out to students and teachers in developing countries. This was right up my alley! We did plenty of research into network conditions and typical device usage. That then informed a tight performance budget. Every design decision—from web fonts to images—was informed by that performance budget. We were producing lean, mean markup, CSS, and JavaScript. But we weren’t the ones implementing the final site. That was being done by the client’s offshore software team, and they insisted on using React. “That’s okay”, I thought. “React can be used server-side so we can still output just what’s needed, right?” Alas, no. These developers did everything client side. When the final site launched, the log-in screen alone required megabytes of JavaScript just to render a form. It was, in my opinion, entirely unfit for purpose. It still pains me when I think about it.

That was a few years ago. I think that these days it has become a lot easier to make the decision to use a framework on the back of the front end. Like I said, that’s certainly been the case on recent Clearleft projects that involved React or Vue.

It surprises me, then, when I see the question of server rendering or client rendering treated almost like an implementation detail. It might be an implementation detail from a developer’s perspective, but it’s a key decision for the user experience. The performance cost of putting your entire tech stack into the browser can be enormous.

Alex Sanders from the development team at The Guardian published a post recently called Revisiting the rendering tier . In it, he describes how they’re moving to React. Now, if this were a move to client-rendered React, that would make a big impact on the user experience. The thing is, I couldn’t tell from the article whether React was going to be used in the browser or on the server. The article talks about “rendering”—which is something that browsers do—and “the DOM”—which is something that only exists in browsers.

So I asked. It turns out that this plan is very much about generating HTML and CSS on the server before sending it to the browser. Excellent!

With that question answered, I’m cool with whatever they choose to use. In this case, they’re choosing to use CSS-in-JS (although, to be pedantic, there’s no C anymore so technically it’s SS-in-JS). As long as the “JS” part is JavaScript on a server, then it makes no difference to the end user, and therefore no difference to me. Not my circus, not my monkeys. For users, the end result is the same whether styling is applied via a selector in an external stylesheet or, for example, via an inline style declaration (and in some situations, a server-rendered CSS-in-JS solution might be better for performance). And so, as a user-centred developer, this is something that I don’t need to care about.


I have misgivings. But just to be clear, these misgivings have nothing to do with users. My misgivings are entirely to do with another group of people: the people who make websites.

There’s a second-order effect. By making React—or even JavaScript in general—a requirement for styling something on a web page, the barrier to entry is raised.

At least, I think that the barrier to entry is raised. I completely acknowledge that this is a subjective judgement. In fact, the reason why a team might decide to make JavaScript a requirement for participation might well be because they believe it makes it easier for people to participate. Let me explain…

It wasn’t that long ago that devs coming from a Computer Science background were deriding CSS for its simplicity, complaining that “it’s broken” and turning their noses up at it. That rhetoric, thankfully, is waning. Nowadays they’re far more likely to acknowledge that CSS might be simple, but it isn’t easy. Concepts like the cascade and specificity are real head-scratchers, and any prior knowledge from imperative programming languages won’t help you in this declarative world—all your hard-won experience and know-how isn’t fungible. Instead, it seems as though all this cascading and specificity is butchering the modularity of your nicely isolated components.

It’s no surprise that programmers with this kind of background would treat CSS as damage and find ways to route around it. The many flavours of CSS-in-JS are testament to this. From a programmer’s point of view, this solution has made things easier. Best of all, as long as it’s being done on the server, there’s no penalty for end users. But now the price is paid in the diversity of your team. In order to participate, a Computer Science programming mindset is now pretty much a requirement. For someone coming from a more declarative background—with really good HTML and CSS skills—everything suddenly seems needlessly complex. And as Tantek observed:

Complexity reinforces privilege.

The result is a form of gatekeeping. I don’t think it’s intentional. I don’t think it’s malicious. It’s being done with the best of intentions, in pursuit of efficiency and productivity. But these code decisions are reflected in hiring practices that exclude people with different but equally valuable skills and perspectives.

Rachel describes HTML, CSS and our vanishing industry entry points:

If we make it so that you have to understand programming to even start, then we take something open and enabling, and place it back in the hands of those who are already privileged.

I think there’s a comparison here with toxic masculinity. Toxic masculinity is obviously terrible for women, but it’s also really shitty for men in the way it stigmatises any male behaviour that doesn’t fit its worldview. Likewise, if the only people your team is interested in hiring are traditional programmers, then those programmers are going to resent having to spend their time dealing with semantic markup, accessibility, styling, and other disciplines that they never trained in. Heydon correctly identifies this as reluctant gatekeeping:

By assuming the role of the Full Stack Developer (which is, in practice, a computer scientist who also writes HTML and CSS), one takes responsibility for all the code, in spite of its radical variance in syntax and purpose, and becomes the gatekeeper of at least some kinds of code one simply doesn’t care about writing well.

This hurts everyone. It’s bad for your team. It’s even worse for the wider development community.

Last year, I was asked “Is there a fear or professional challenge that keeps you up at night?” I responded:

My greatest fear for the web is that it becomes the domain of an elite priesthood of developers. I firmly believe that, as Tim Berners-Lee put it, “this is for everyone.” And I don’t just mean it’s for everyone to use—I believe it’s for everyone to make as well. That’s why I get very worried by anything that raises the barrier to entry to web design and web development.

I’ve described a number of dichotomies here:

  • Materials vs. tools,
  • Front of the front end vs. back of the front end,
  • User experience vs. developer experience,
  • Client-side rendering vs. server-side rendering,
  • Declarative languages vs. imperative languages.

But the split that worries the most is this:

  • The people who make the web vs. the people who are excluded from making the web.

The Technical Debt Myth

In some cases, it’s entirely valid to explore new products and technologies, but in others, our striving for novelty becomes the driving factor for abandoning perfectly suitable solutions under the umbrella of technical debt.

Just because a technology is a few years old and possibly frustrating in some cases doesn’t mean you’re in technical debt. We need to stop projecting our annoyances as pitfalls of technological or design choices.

Tuesday, April 9th, 2019

Defining Productivity — Jeremy Wagner

We have a tendency in our line of work to assume that what benefits us as developers translates to a benefit for those who use what we make. This is an unsafe assumption.

Building accessible websites and apps is a moral obligation | Go Make Things

  • Morality is not always relative.
  • You’re a web professional.
  • The web is accessible out-of-the-box. We break it.
  • It’s not on people with disabilities to tell you how you screwed up.
  • It should be easier. This is our job.

Monday, April 8th, 2019

The Bureau of Suspended Objects

200 discarded objects from a dump in San Francisco, meticulously catalogued, researched, and documented by Jenny Odell. The result is something more revealing than most pre-planned time capsule projects …although this project may be somewhat short-lived as it’s hosted on Tumblr.

Methods - 18F Methods

A very handy collection of design exercises as used by 18F. There’s a lot of crossover here with the Clearleft toolbox.

A collection of tools to bring human-centered design into your project.

These methods are categorised by:

  1. Discover
  2. Decide
  3. Make
  4. Validate
  5. Fundamentals

User interfaces: hiding stuff should be a last resort by Adam Silver

When we hide content, there’s a greater risk the user won’t see it. There’s a higher reliance on digital literacy and it’s generally more labour intensive for the user.

Worse still, sometimes we kill off essential content.

Sunday, April 7th, 2019

Drag’n’drop revisited

I got a message from a screen-reader user of The Session recently, letting me know of a problem they were having. I love getting any kind of feedback around accessibility, so this was like gold dust to me.

They pointed out that the drag’n’drop interface for rearranging the order of tunes in a set was inaccessible.

Drag and drop

Of course! I slapped my forehead. How could I have missed this?

It had been a while since I had implemented that functionality, so before even looking at the existing code, I started to think about how I could improve the situation. Maybe I could capture keystroke events from the arrow keys and announce changes via ARIA values? That sounded a bit heavy-handed though: mess with people’s native keyboard functionality at your peril.

Then I looked at the code. That was when I realised that the fix was going to be much, much easier than I thought.

I documented my process of adding the drag’n’drop functionality back in 2016. Past me had his progressive enhancement hat on:

One of the interfaces needed for this feature was a form to re-order items in a list. So I thought to myself, “what’s the simplest technology to enable this functionality?” I came up with a series of select elements within a form.


The problem was in my feature detection:

There’s a little bit of mustard-cutting going on: does the dragula object exist, and does the browser understand querySelector? If so, the select elements are hidden and the drag’n’drop is enabled.

The logic was fine, but the execution was flawed. I was being lazy and hiding the select elements with display: none. That hides them visually, but it also hides them from screen readers. I swapped out that style declaration for one that visually hides the elements, but keeps them accessible and focusable.

It was a very quick fix. I had the odd sensation of wanting to thank Past Me for making things easy for Present Me. But I don’t want to talk about time travel because if we start talking about it then we’re going to be here all day talking about it, making diagrams with straws.

I pushed the fix, told the screen-reader user who originally contacted me, and got a reply back saying that everything was working great now. Success!

Saturday, April 6th, 2019

Cool goal

One evening last month, during An Event Apart Seattle, a bunch of the speakers were gathered in the bar in the hotel lobby, shooting the breeze and having a nightcap before the next day’s activities. In a quasi-philosophical mode, the topic of goals came up. Not the sporting variety, but life and career goals.

As I everyone related (confessed?) their goals, I had to really think hard. I don’t think I have any goals. I find it hard enough to think past the next few months, much less form ideas about what I might want to be doing in a decade. But then I remembered that I did once have a goal.

Back in the ’90s, when I was living in Germany and first starting to make websites, there was a website I would check every day for inspiration: Project Cool’s Cool Site Of The Day. I resolved that my life’s goal was to one day have a website I made be the cool site of the day.

About a year later, to my great shock and surprise, I achieved my goal. An early iteration of Jessica’s site—complete with whizzy DHTML animations—was the featured site of the day on Project Cool. I was overjoyed!

I never bothered to come up with a new goal to supercede that one. Maybe I should’ve just retired there and then—I had peaked.

Megan Sapnar Ankerson wrote an article a few years back about How coolness defined the World Wide Web of the 1990s:

The early web was simply teeming with declarations of cool: Cool Sites of the Day, the Night, the Week, the Year; Cool Surf Spots; Cool Picks; Way Cool Websites; Project Cool Sightings. Coolness awards once besieged the web’s virtual landscape like an overgrown trophy collection.

It’s a terrific piece that ponders the changing nature of the web, and the changing nature of that word: cool.

Perhaps the word will continue to fall out of favour. Tim Berners-Lee may have demonstrated excellent foresight when he added this footnote to his classic document, Cool URIs don’t change—still available at its original URL, of course:

Historical note: At the end of the 20th century when this was written, “cool” was an epithet of approval particularly among young, indicating trendiness, quality, or appropriateness.

Friday, April 5th, 2019

Why Computer Programmers Should Stop Calling Themselves Engineers - The Atlantic

This article by Ian Bogost from a few years back touches on one of the themes in the talk I gave at New Adventures:

“Engineer” conjures the image of the hard-hat-topped designer-builder, carefully crafting tomorrow. But such an aspiration is rarely realized by computing. The respectability of engineering, a feature built over many decades of closely controlled, education- and apprenticeship-oriented certification, becomes reinterpreted as a fast-and-loose commitment to craftwork as business.

Thursday, April 4th, 2019

Apple’s new feature a step towards digital apartheid - Axess Lab

I also discussed this accessibility events feature with my friend who is a screen reader user herself. She said it feels like it’s a first step towards a well-meant digital apartheid.

A progressive disclosure component - Andy Bell

This is a really nice write-up of creating an accessible progressive disclosure widget (a show/hide toggle).

Where it gets really interesting is when Andy shows how it could all be encapsulated into a web component with a progressive enhancement mindset

Tuesday, April 2nd, 2019

Yet Another JavaScript Framework | CSS-Tricks

This is such a well-written piece! Jay Hoffman—author of the excellent History Of The Web newsletter—talks us through the JavaScript library battles of the late 2000’s …and the consequences that arose just last year.

The closing line is perfect.

A walk in the country

Spring sprung last weekend. Saturday was an unseasonably nice and sunny day, so Jessica and I decided to make the most of it with a walk in the countryside.

Our route took us from Woodingdean to Lewes. Woodingdean isn’t too far away from where we live, but the walk there would’ve been beside a busy road so we just took the bus for that portion.

Being on the bus means we didn’t stop to take note of an interesting location. Just outside the Nuffield hospital is the unassuming opening of the Woodingdean Water Well. This is the deepest hand-dug well in the world—deeper than the Empire State Building is tall—dug over the course of four years in the mid nineteenth century. I didn’t even know of its existence until Brian told me about it.

From Woodingdean, we walked along Juggs Road. Originally a Roman ridgeway, it was named for the fishwives travelling from Brighton to Lewes with their marine wares. This route took us over Newmarket Hill, the site of many mock battles in the 18th century, for the amusement of the royals on a day out from the Pavilion.

Walking from Woodingdean to Lewes.

Walking through Kingston, we came to the Ashcombe Windmill, where I pet a nice horsey.

Went for a walk in the countryside and made a friend.

Then it was on into Lewes, where we could admire the handsome architecture of Lewes Cathedral …the local wags’ name for Harveys Brewery. Thanks to Ben’s connections, Clearleft managed to get a behind-the-scenes tour of this Victorian marvel a few months ago.

Harveys Brewery.

This time round, there would be no brewery tour, but that’s okay—there’s a shop right outside. We chose an appropriate ale to accompany a picnic of pork pie and apple.

Lewes picnic.

Having walked all the way to Lewes, it would’ve been a shame to return empty-handed, so before getting the bus back to Brighton, we popped into Mays Farm Cart and purchased a magnificent forerib of beef straight from the farm.

‘Twas a most worthwhile day out.

Sunday, March 31st, 2019

A Public Record at Risk: The Dire State of News Archiving in the Digital Age - Columbia Journalism Review

This well-researched in-depth piece doesn’t paint a pretty picture for archiving online news:

Of the 21 news organizations in our study, 19 were not taking any protective steps at all to archive their web output. The remaining two lacked formal strategies to ensure that their current practices have the kind of longevity to outlast changes in technology.

Monday, March 25th, 2019

Stuffing the Front End

53% of mobile visits leave a page that takes longer than 3 seconds to load. That means that a large number of visitors probably abandoned these sites because they were staring at a blank screen for 3 seconds, said “fuck it,” and left approximately half way before the page showed up. The fact that the next page interaction would have been quicker—assuming all the JS files even downloaded correctly in the first attempt—doesn’t amount to much if they didn’t stick around for the first page to load. What was gained by putting the business logic in the front end in this scenario?