Tags: development

2403

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Thursday, October 7th, 2021

Getting Started with PWAs [Workshop]

The slides from Aaron’s workshop at today’s PWA Summit. I really like the idea of checking navigator.connection.downlink and navigator.connection.saveData inside a service worker to serve different or fewer assets!

Have Single-Page Apps Ruined the Web? | Transitional Apps with Rich Harris, NYTimes - YouTube

This is a terrific and nuanced talk that packs a lot into less than twenty minutes.

I heartily concur with Rich’s assessment that most websites aren’t apps or documents but something in between. It’s a continuum. And I really like Rich’s proposed approach: transitional web apps.

(The secret sauce in transitional web apps is progressive enhancement.)

Have Single-Page Apps Ruined the Web? | Transitional Apps with Rich Harris, NYTimes

Tuesday, October 5th, 2021

Build a Better Mobile Input

This is such a handy tool for building forms! Choose different combinations of type, inputmode, and autocomplete attributes on input elements and see how that will be conveyed to users on iOS and Android devices.

A History of Design Systems on the Web - The History of the Web

It’s great to see former Clearlefties like Nat, Paul and Anna rightly getting namechecked in this history of designing for the web in a systemic way. It’s a tradition that continues to this day with projects like Utopia.

Saturday, October 2nd, 2021

Tiny Helpers

A very comprehensive collection of standalone little tools for web design and development—tools that do one thing.

Wednesday, September 29th, 2021

Responsible JavaScript, A Book Apart

TAKE MY MONEY!!!

If we want people to fully experience the sites we have worked so hard to craft, then we must be judicious in our use of JavaScript. In thoughtful detail, Jeremy Wagner shows how JavaScript can be used to progressively enhance server-side functionality, while improving speed and access for more visitors. By centering user needs every step of the way—from toolchains to metrics to testing—we can all contribute to a more inclusive, accessible, and resilient web.

Sunday, September 26th, 2021

🧠 ct.css – Let’s take a look inside your `head`

I love a good bookmarklet, and Harry has made a very good bookmarklet indeed.

Drag ct.css to your browser bar and then press it whenever you’re on a site you want to check for optimising what’s in the head element.

Monday, September 20th, 2021

The Future of CSS: Cascade Layers (CSS @layer) – Bram.us

This is a really in-depth explanation from Bramus of the upcoming @layer rules in CSS, from the brilliant minds of Miriam, fantasai and Tab.

Basically, you’ll be able to scope styles, and you get to define the context for that scoping. So all those CSS-in-JS folks who don’t appreciate the cascade will have a mechanism to get encapsulated styles.

I can see this being very handy for big complex codebases with lots of people on the team.

New principle: Do not design around third-party tools unless it actually breaks the Web · Issue #335 · w3ctag/design-principles

There’s a really interesting discussion here, kicked off by Lea, about balancing long-term standards with short-term pragmatism. Specifically, it’s about naming things.

Naming things is hard. Naming things in standards, doubly so.

In Quest of Search

On the surface this is about the pros and cons of minting a new HTML search element to replace div role="search" but there’s a deeper point which is that, while ARIA exists to the plug the gaps in HTML, the long-term goal is to have no gaps.

ARIA is not meant to replace HTML. If anything, the need to use ARIA as ‘polyfill’ for HTML semantics could be considered as a sign and a constant reminder of the fact that HTML falls short on some semantics that benefit users of assistive technologies.

Thursday, September 16th, 2021

Basic Pattern Repository

A nice little collection of very simple—and very lightweight—SVGs to use as background patterns.

Wednesday, September 15th, 2021

Design engineering on the Clearleft podcast

If you’re subscribed to the Clearleft podcast, then the latest episode is winging its way through the ether to your podcast software. The topic is one close to my heart: design engineering.

I wrote about this role back in February. I think my fervour comes across in that post and you can probably hear it in the podcast episode too.

As ever, I end up asking the question, “So what exactly is insert topic of the podcast episode here?”

I’ve got some smart folks answering that question. There’s an excerpt from Tobias Ahlin’s talk at this year’s UX Fest. And when I interviewed Adekunle Oduye for a previous episode on prototyping, we also discussed design engineering so I pulled out the relevant bits. But the bulk of the episode features the voice of Trys Mudford.

As you can gather from the many posts on Trys’s blog, he has a lot to say on the topic of design engineering. Luckily for me, he says it all with a clear, articulate delivery—the perfect podcast guest!

This episode finishes with a call to action (oh, the synergy!). If, after listening to 23 minutes of discussion on design engineering, you find yourself thinking “Hey, I think I might be a design engineer!”, then you should definitely head along to this job opening at Clearleft:

We’re currently looking for a design-friendly front-end developer with demonstrable skills in pattern-based prototyping and production.

Have a listen to episode two of season three of the Clearleft podcast and if you like what you hear, come and join us!

Tuesday, September 14th, 2021

Accessibility testing

I was doing some accessibility work with a client a little while back. It was mostly giving their site the once-over, highlighting any issues that we could then discuss. It was an audit of sorts.

While I was doing this I started to realise that not all accessibility issues are created equal. I don’t just mean in their severity. I mean that some issues can—and should—be caught early on, while other issues can only be found later.

Take colour contrast. This is something that should be checked before a line of code is written. When designs are being sketched out and then refined in a graphical editor like Figma, that’s the time to check the ratio between background and foreground colours to make sure there’s enough contrast between them. You can catch this kind of thing later on, but by then it’s likely to come with a higher cost—you might have to literally go back to the drawing board. It’s better to find the issue when you’re at the drawing board the first time.

Then there’s the HTML. Most accessibility issues here can be caught before the site goes live. Usually they’re issues of ommission: form fields that don’t have an explicitly associated label element (using the for and id attributes); images that don’t have alt text; pages that don’t have sensible heading levels or landmark regions like main and nav. None of these are particularly onerous to fix and they come with the biggest bang for your buck. If you’ve got sensible forms, sensible headings, alt text on images, and a solid document structure, you’ve already covered the vast majority of accessibility issues with very little overhead. Some of these checks can also be automated: alt text for images; labels for inputs.

Then there’s interactive stuff. If you only use native HTML elements you’re probably in the clear, but chances are you’ve got some bespoke interactivity on your site: a carousel; a mega dropdown for navigation; a tabbed interface. HTML doesn’t give you any of those out of the box so you’d need to make your own using a combination of HTML, CSS, JavaScript and ARIA. There’s plenty of testing you can do before launching—I always ask myself “What would Heydon do?”—but these components really benefit from being tested by real screen reader users.

So if you commission an accessibility audit, you should hope to get feedback that’s mostly in that third category—interactive widgets.

If you get feedback on document structure and other semantic issues with the HTML, you should fix those issues, sure, but you should also see what you can do to stop those issues going live again in the future. Perhaps you can add some steps in the build process. Or maybe it’s more about making sure the devs are aware of these low-hanging fruit. Or perhaps there’s a framework or content management system that’s stopping you from improving your HTML. Then you need to execute a plan for ditching that software.

If you get feedback about colour contrast issues, just fixing the immediate problem isn’t going to address the underlying issue. There’s a process problem, or perhaps a communication issue. In that case, don’t look for a technical solution. A design system, for example, will not magically fix a workflow issue or route around the problem of designers and developers not talking to each other.

When you commission an accessibility audit, you want to make sure you’re getting the most out of it. Don’t squander it on issues that you can catch and fix yourself. Make sure that the bulk of the audit is being spent on the specific issues that are unique to your site.

Monday, September 13th, 2021

Stakeholders of styling

When I wrote about the new accent-color property in CSS, I pondered how much control a web developer should have over styling form controls:

Who are we to make that decision? Shouldn’t the user’s choice take primacy over our choices?

But then again, where do we draw the line? We’re allowed over-ride link colours. We’re allowed over-ride font choices.

Ultimately, I came down on the side of granting authors more control:

If developers don’t get a standardised way to customise native form controls, they’ll just recreate their own over-engineered versions.

This question of “who gets to decide?” used to be much more prevelant in the early days of the web. One way to think about this is that there are three stakeholders involved in the presentation of a web page:

  1. The author of the page. “Author” is spec-speak for designer or developer.
  2. The user.
  3. The browser, or user agent. A piece of software tries to balance the needs of both author and user. But, as the name implies, the user takes precedence.

These days we tend to think of web design a single-stakeholder undertaking. The author decides how something should be presented and then executes that decision using CSS.

But as Eric once said, every line of you CSS you write is a suggestion to the browser. That’s not how we think about CSS though. We think of CSS like a series of instructions rather than suggestions. Never mind respecting the user’s preferences; one of the first things we do is reset all the user agent’s styles.

In the early days of the web, more consideration was given to the idea of style suggestions rather than instructions. Heck, users could always over-ride any of your suggestions with their own user stylesheet. These days, users would need to install a browser extension to do the same thing.

The first proposal for CSS had a concept called “influence”:

h2.font.size = 20pt 40%

Here, the requested influence is reduced to 40%. If a style sheet later in the cascade also requests influence over h2.font.size, up to 60% can be granted. When the document is rendered, a weighted average of the two requests is calculated, and the final font size is determined.

I think the only remnant of “influence” left in CSS is accidental. It’s in the specificity of selectors …and the !important declaration.

I think it’s a shame that user stylesheets are no longer a thing. But I get why they were dropped from browsers. They date from a time when it was mostly nerds using the web, before “regular folks” came on board. I understand why it became a little-used feature, suitable for being dropped. But the principle of it still rankles slightly.

But in recent years there has been a slight return to the multi-stakeholder concept of styling websites. Thanks to prefers-reduced-motion and prefers-color-scheme, a responsible author can choose to bow to the wishes of the user.

I was reminded of this when I added a dark mode to my website:

Y’know, when I first heard about Apple adding dark mode to their OS—and also to CSS—I thought, “Oh, great, Apple are making shit up again!” But then I realised that, like user style sheets, this is one more reminder to designers and developers that they don’t get the last word—users do.

Responsible JavaScript

I cannot wait for this book (apart) by Jeremy Wagner to arrive—it’s gonna be sooooo good!

Increasing the amount of JavaScript we ship results in poor user experiences, and the iron law of our work is that users must come first. Our preferences and comfort as developers are secondary.

That’s a mission to take to heart while we figure out how we can use JavaScript more responsibly in an industry that relies on it more than ever — and I think that Responsible JavaScript — a carefully written book that the talented people at A Book Apart have worked with me to publish — can help you along the way.

Thursday, September 9th, 2021

Chrome is the new Safari. And so are Edge and Firefox. – Hello my name is Niels Leenheer

You may not realise that all browsers on iOS are required to use the same rendering engine as Safari. On other platforms, this is not the case.

A terrific in-depth look at the frustrating state of the web on iOS.

So it’s not just one browser that falls behind. It’s all browsers on iOS. The whole web on iOS falls behind. And iOS has become so important that the entire web platform is being held back as a result.

And this damning assessment is mercifully free of conspiracy theories.

The Safari and Chrome team both want to make the web safer and work hard to improve the web. But they do have different views on what the web should be.

Google is focussing on improving the web by making it more capable.

Safari seems to focus on improving the web as it currently is.

Read the whole thing—it’s excellent!

There can only be one proper solution: Apple needs to open up their App Store to browsers with other rendering engines. Scrap rule 2.5.6 and allow other browsers on iOS and let them genuinely compete. Even though Apple has been forced to compromise on some App Store rules, I have little hope for this to happen.

Why We Create Progressive Web Apps: A Conversation with Jeremy Keith

This is a really nice write-up by Sydney of the chat we had on her podcast.

Accent all areas

Whenever a new version of Chrome comes out, there’s an accompanying blog post listing what’s new. Chrome 93 just came out and, sure enough, Pete has written a blog post about it.

But what I think is the most exciting addition to the browser isn’t listed.

What is this feature that’s got me so excited?

Okay, I’ve probably oversold it now because actually, it looks like a rather small trivial addition. It’s the accent-color property in CSS.

Up until now, accent colour was controlled by the operating system. If you’re on a Mac, go to “System Preferences” and then “General”. There you’ll see an option to change your accent colour. Try picking a different colour. You’ll see that change cascade down into the other form fields in that preference pane: checkboxes, radio buttons, and dropdowns.

Your choice will also cascade down into web pages. Any web page that uses native checkboxes, radio buttons and other interface elements will inherit that colour.

This is how interface elements are supposed to work. The browser inherits the look’n’feel of the inputs from the operating system.

That’s the theory anyway. In practice, form elements—such as dropdowns—can look different from browser to browser, something that shouldn’t be happening if the browsers are all inheriting from the operating system.

Anyway, it’s probably this supposed separation of responsibility between browser and operating system which has led to the current situation with form fields and CSS. Authors can style form fields up to a point, but there’s always a line that you don’t get to cross.

The accent colour of a selected radio button or a checkbox has historically been on the other side of that line. You either had to accept that you couldn’t change the colour, or you had to make your own checkbox or radio button interface. You could use CSS to hide the native element and replace it with an image instead.

That feels a bit over-engineered and frankly kind of hacky. It reminds me of the bad old days of image replacement for text before we had web fonts.

Now, with the accent-color property in CSS, authors can over-ride the choice that the user has set at the operating system level.

On the one hand, this doesn’t feel great to me. Who are we to make that decision? Shouldn’t the user’s choice take primacy over our choices?

But then again, where do we draw the line? We’re allowed over-ride link colours. We’re allowed over-ride font choices.

Ultimately I think it’s a good thing that authors can now specify an accent colour. What makes me think that is the behaviour that authors have shown if they don’t have this ability—they do it anyway, and in a hackier manner. This is why I think the work of the Open UI group is so important. If developers don’t get a standardised way to customise native form controls, they’ll just recreate their own over-engineered versions.

The purpose of Open UI to the web platform is to allow web developers to style and extend built-in web UI controls, such as select dropdowns, checkboxes, radio buttons, and date/color pickers.

Trying to stop developers from styling checkboxes and radio buttons is like trying to stop teenagers from having sex. You might as well accept that it’s going to happen and give them contraception so they can at least do it safely.

So I welcome this new CSS condom.

You can see accent-color in action in this demo. Change the value of the accent-color property to see the form fields update:

:root {
  accent-color: rebeccapurple;
}

Applying it at the document level like that will make it universal, but you can also use the property on an element-by-element basis using whatever selector you want.

That demo works in Chrome and Edge 93, the current release. It also works in Firefox 92, which literally just landed (like as I was writing this blog post, support for accent-color magically arrived!).

As for Safari, well, who knows? If Apple published a roadmap, then developers would have a clue when to expect a property like this to land. But we mere mortals cannot be trusted with such important hush-hush information.

In the meantime, keep an eye on Can I Use. And lack of support on one browser is no reason not to use accent-color anyway. It’s a progressive enhancement. Add it to your CSS today and it will work in more browsers in the future.

State of the Browser 2021

The excellent (and cheap!) State Of The Browser is coming back to Conway Hall this year on Saturday, October 30th. Speakers include Rachel Andrew and Amber Case.

Everyone needs to show proof of vaccination or a negative Covid test to get into the venue, which is reassuring.

I think I’m gonna go!

Can we have custom media queries, please?

I knew that custom properties don’t work in media queries but I had no idea that there was such a thing as custom media queries, which effectively do the same thing.

But this is not implemented in any browser. Boo! This would be so useful! If browser makers can overcame the technical hurdles with container queries, I’m sure they can deliver custom media queries.