Journal tags: sharing

39

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Standards processing

I’ve been like a dog with a bone the way I’ve been pushing for a declarative option for the Web Share API in the shape of button type=“share”. It’s been an interesting window into the world of web standards.

The story so far…

That’s the situation currently. The general consensus seems to be that it’s probably too soon to be talking about implementation at this stage—the Web Share API itself is still pretty new—but gathering data to inform future work is good.

In planning for the next TPAC meeting (the big web standards gathering), Marcos summarised the situation like this:

Not blocking: but a proposal was made by @adactio to come up with a declarative solution, but at least two implementers have said that now is not the appropriate time to add such a thing to the spec (we need more implementation experience + and also to see how devs use the API) - but it would be great to see a proposal incubated at the WICG.

Now this where things can get a little confusing because it used to be that if you wanted to incubate a proposal, you’d have to do on Discourse, which is a steaming pile of crap that requires JavaScript in order to put text on a screen. But Šime pointed out that proposals can now be submitted on Github.

So that’s where I’ve submitted my proposal, linking through to the explainer document.

Like I said, I’m not expecting anything to happen anytime soon, but it would be really good to gather as much data as possible around existing usage of the Web Share API. If you’re using it, or you know anyone who’s using it, please, please, please take a moment to provide a quick description. And if you could help spread the word to get that issue in front of as many devs as possible, I’d be very grateful.

(Many thanks to everyone who’s already contributed to that issue—much appreciated!)

The reason for a share button type

If you’re at all interested in what I wrote about a declarative Web Share API—and its sequel, a polyfill for button type=”share”—then you might be interested in an explainer document I’ve put together.

It’s a useful exercise for me to enumerate the reasoning for button type=“share” in one place. If you have any feedback, feel free to fork it or create an issue.

The document is based on my initial blog posts and the discussion that followed in this issue on the repo for the Web Share API. In that thread I got some pushback from Marcos. There are three points he makes. I think that two of them lack merit, but the third one is actually spot on.

Here’s the first bit of pushback:

Apart from placing a button in the content, I’m not sure what the proposal offers over what (at least one) browser already provides? For instance, Safari UI already provides a share button by default on every page

But that is addressed in the explainer document for the Web Share API itself:

The browser UI may not always be available, e.g., when a web app has been installed as a standalone/fullscreen app.

That’s exactly what I wanted to address. Browser UI is not always available and as progressive web apps become more popular, authors will need to provide a way for users to share the current URL—something that previously was handled by browsers.

That use-case of sharing the current page leads nicely into the second bit of pushback:

The API is specialized… using it to share the same page is kinda pointless.

But again, the explainer document for the Web Share API directly contradicts this:

Sharing the page’s own URL (a very common case)…

Rather than being a difference of opinion, this is something that could be resolved with data. I’d really like to find out how people are currently using the Web Share API. How much of the current usage falls into the category of “share the current page”? I don’t know the best way to gather this data though. If you have any ideas, let me know. I’ve started an issue where you can share how you’re using the Web Share API. Or if you’re not using the Web Share API, but you know someone who is, please let them know.

Okay, so those first two bits of pushback directly contradict what’s in the explainer document for the Web Share API. The third bit of pushback is more philosophical and, I think, more interesting.

The Web Share API explainer document does a good job of explaining why a declarative solution is desirable:

The link can be placed declaratively on the page, with no need for a JavaScript click event handler.

That’s also my justification for having a declarative alternative: it would be easier for more people to use. I said:

At a fundamental level, declarative technologies have a lower barrier to entry than imperative technologies.

But Marcos wrote:

That’s demonstrably false and a common misconception: See OWL, XForms, SVG, or any XML+namespace spec. Even HTML is poorly understood, but it just happens to have extremely robust error recovery (giving the illusion of it being easy). However, that’s not a function of it being “declarative”.

He’s absolutely right.

It’s not so much that I want a declarative option—I want an option that has robust error recovery. After all, XML is a declarative language but its error handling is as strict as an imperative language like JavaScript: make one syntactical error and nothing works. XML has a brittle error-handling model by design. HTML and CSS have extremely robust error recovery by design. It’s that error-handling model that gives HTML and CSS their robustness.

I’ve been using the word “declarative” when I actually meant “robust in handling errors”.

I guess that when I’ve been talking about “a declarative solution”, I’ve been thinking in terms of the three languages parsed by browsers: HTML, CSS, and JavaScript. Two of those languages are declarative, and those two also happen to have much more forgiving error-handling than the third language. That’s the important part—the error handling—not the fact that they’re declarative.

I’ve been using “declarative” as a shorthand for “either HTML or CSS”, but really I should try to be more precise in my language. The word “declarative” covers a wide range of possible languages, and not all of them lower the barrier to entry. A declarative language with a brittle error-handling model is as daunting as an imperative language.

I should try to use a more descriptive word than “declarative” when I’m describing HTML or CSS. Resilient? Robust?

With that in mind, button type=“share” is worth pursuing. Yes, it’s a declarative option for using the Web Share API, but more important, it’s a robust option for using the Web Share API.

I invite you to read the explainer document for a share button type and I welcome your feedback …especially if you’re currently using the Web Share API!

A polyfill for button type=”share”

After writing about a declarative Web Share API here yesterday I thought I’d better share the idea (see what I did there?).

I opened an issue on the Github repo for the spec.

(I hope that’s the right place for this proposal. I know that in the past ideas were kicked around on the Discourse site for Web platform Incubator Community Group but I can’t stand Discourse. It literally requires JavaScript to render anything to the screen even though the entire content is text. If it turns out that that is the place I should’ve posted, I guess I’ll hold my nose and do it using the most over-engineered reinvention of the browser I’ve ever seen. But I believe that the plan is for WICG to migrate proposals to Github anyway.)

I also realised that, as the JavaScript Web Share API already exists, I can use it to polyfill my suggestion for:

<button type="share">

The polyfill also demonstrates how feature detection could work. Here’s the code.

This polyfill takes an Inception approach to feature detection. There are three nested levels:

  1. This browser supports button type="share". Great! Don’t do anything. Otherwise proceed to level two.
  2. This browser supports the JavaScript Web Share API. Use that API to share the current page URL and title. Otherwise proceed to level three.
  3. Use a mailto: link to prefill an email with the page title as the subject and the URL in the body. Ya basic!

The idea is that, as long as you include the 20 lines of polyfill code, you could start using button type="share" in your pages today.

I’ve made a test page on Codepen. I’m just using plain text in the button but you could use a nice image or SVG or combination. You can use the Codepen test page to observe two of the three possible behaviours browsers could exhibit:

  1. A browser supports button type="share". Currently that’s none because I literally made this shit up yesterday.
  2. A browser supports the JavaScript Web Share API. This is Safari on Mac, Edge on Windows, Safari on iOS, and Chrome, Samsung Internet, and Firefox on Android.
  3. A browser supports neither button type="share" nor the existing JavaScript Web Share API. This is Firefox and Chrome on desktop (and Edge if you’re on a Mac).

See the Pen Polyfill for button type=”share" by Jeremy Keith (@adactio) on CodePen.

The polyfill doesn’t support Internet Explorer 11 or lower because it uses the DOM closest() method. Feel free to fork and rewrite if you need to support old IE.

A declarative Web Share API

I’ve written about the Web Share API before. It’s a handy little bit of JavaScript that—if supported—brings up a system-level way of sharing a page. Seeing as it probably won’t be long before we won’t be able to see full URLs in browsers anymore, it’s going to fall on us as site owners to provide this kind of fundamental access.

Right now the Web Share API exists entirely in JavaScript. There are quite a few browser APIs like that, and it always feels like a bit of a shame to me. Ideally there should be a JavaScript API and a declarative option, even if the declarative option isn’t as powerful.

Take form validation. To cover the most common use cases, you probably only need to use declarative markup like input type="email" or the required attribute. But if your use case gets a bit more complicated, you can reach for the Constraint Validation API in JavaScript.

I like that pattern. I wish it were an option for JavaScript-only APIs. Take the Geolocation API, for example. Right now it’s only available through JavaScript. But what if there were an input type="geolocation" ? It wouldn’t cover all use cases, but it wouldn’t have to. For the simple case of getting someone’s location (like getting someone’s email or telephone number), it would do. For anything more complex than that, that’s what the JavaScript API is for.

I was reminded of this recently when Ada Rose Cannon tweeted:

It really feels like there should be a semantic version of the share API, like a mailto: link

I think she’s absolutely right. The Web Share API has one primary use case: let the user share the current page. If that use case could be met in a declarative way, then it would have a lower barrier to entry. And for anyone who needs to do something more complicated, that’s what the JavaScript API is for.

But Pete LePage asked:

How would you feature detect for it?

Good question. With the JavaScript API you can do feature detection—if the API isn’t supported you can either bail or provide your own implementation.

There a few different ways of extending HTML that allow you to provide a fallback for non-supporting browsers.

You could mint a new element with a content model that says “Browsers, if you do support this element, ignore everything inside the opening and closing tags.” That’s the way that the canvas element works. It’s the same for audio and video—they ignore everything inside them that isn’t a source element. So developers can provide a fallback within the opening and closing tags.

But forging a new element would be overkill for something like the Web Share API (or Geolocation). There are more subtle ways of extending HTML that I’ve already alluded to.

Making a new element is a lot of work. Making a new attribute could also be a lot of work. But making a new attribute value might hit the sweet spot. That’s why I suggested something like input type="geolocation" for the declarative version of the Geolocation API. There’s prior art here; this is how we got input types for email, url, tel, color, date, etc. The key piece of behaviour is that non-supporting browsers will treat any value they don’t understand as “text”.

I don’t think there should be input type="share". The action of sharing isn’t an input. But I do think we could find an existing HTML element with an attribute that currently accepts a list of possible values. Adding one more value to that list feels like an inexpensive move.

Here’s what I suggested:

<button type=”share” value=”title,text”>

For non-supporting browsers, it’s a regular button and needs polyfilling, no different to the situation with the JavaScript API. But if supported, no JS needed?

The type attribute of the button element currently accepts three possible values: “submit”, “reset”, or “button”. If you give it any other value, it will behave as though you gave it a type of “submit” or “button” (depending on whether it’s in a form or not) …just like an unknown type value on an input element will behave like “text”.

If a browser supports button type="share”, then when the user clicks on it, the browser can go “Right, I’m handing over to the operating system now.”

There’s still the question of how to pass data to the operating system on what gets shared. Currently the JavaScript API allows you to share any combination of URL, text, and description.

Initially I was thinking that the value attribute could be used to store this data in some kind of key/value pairing, but the more I think about it, the more I think that this aspect should remain the exclusive domain of the JavaScript API. The declarative version could grab the current URL and the value of the page’s title element and pass those along to the operating system. If you need anything more complex than that, use the JavaScript API.

So what I’m proposing is:

<button type="share">

That’s it.

But how would you test for browser support? The same way as you can currently test for supported input types. Make use of the fact that an element’s attribute value and an element’s property value (which 99% of the time are the same), will be different if the attribute value isn’t supported:

var testButton = document.createElement("button");
testButton.setAttribute("type","share");
if (testButton.type != "share") {
// polyfill
}

So that’s my modest proposal. Extend the list of possible values for the type attribute on the button element to include “share” (or something like that). In supporting browsers, it triggers a very bare-bones handover to the OS (the current URL and the current page title). In non-supporting browsers, it behaves like a button currently behaves.

Web Share API test

Remember a while back I wrote about some odd behaviour with the Web Share API in Safari on iOS?

When the share() method is triggered, iOS provides multiple ways of sharing: Messages, Airdrop, email, and so on. But the simplest option is the one labelled “copy”, which copies to the clipboard.

Here’s the thing: if you’ve provided a text parameter to the share() method then that’s what’s going to get copied to the clipboard—not the URL.

That’s a shame. Personally, I think the url field should take precedence.

Tess filed a bug soon after, which was very gratifying to see.

Now Phil has put together a test case:

  1. Share URL, title, and text
  2. Share URL and title
  3. Share URL and text

Very handy! The results (using the “copy” to clipboard action) are somewhat like rock, paper, scissors:

  • URL beats title,
  • text beats URL,
  • nothing beats text.

So it’s more like rock, paper, high explosives.

Design systems roundup

When I started writing a post about architects, gardeners, and design systems, it was going to be a quick follow-up to my post about web standards, dictionaries, and design systems. I had spotted an interesting metaphor in one of Frank’s posts, and I thought it was worth jotting it down.

But after making that connection, I kept writing. I wanted to point out the fetishism we have for creation over curation; building over maintenance.

Then the post took a bit of a dark turn. I wrote about how the most commonly cited reasons for creating a design system—efficiency and consistency—are the same processes that have led to automation and dehumanisation in the past.

That’s where I left things. Others have picked up the baton.

Dave wrote a post called The Web is Industrialized and I helped industrialize it. What I said resonated with him:

This kills me, but it’s true. We’ve industrialized design and are relegated to squeezing efficiencies out of it through our design systems. All CSS changes must now have a business value and user story ticket attached to it. We operate more like Taylor and his stopwatch and Gantt and his charts, maximizing effort and impact rather than focusing on the human aspects of product development.

But he also points out the many benefits of systemetising:

At the same time, I have seen first hand how design systems can yield improvements in accessibility, performance, and shared knowledge across a willing team. I’ve seen them illuminate problems in design and code. I’ve seen them speed up design and development allowing teams to build, share, and validate prototypes or A/B tests before undergoing costly guesswork in production. There’s value in these tools, these processes.

Emphasis mine. I think that’s a key phrase: “a willing team.”

Ethan tackles this in his post The design systems we swim in:

A design system that optimizes for consistency relies on compliance: specifically, the people using the system have to comply with the system’s rules, in order to deliver on that promised consistency. And this is why that, as a way of doing something, a design system can be pretty dehumanizing.

But a design system need not be a constraining straitjacket—a means of enforcing consistency by keeping creators from colouring outside the lines. Used well, a design system can be a tool to give creators more freedom:

Does the system you work with allow you to control the process of your work, to make situational decisions? Or is it simply a set of rules you have to follow?

This is key. A design system is the product of an organisation’s culture. That’s something that Brad digs into his post, Design Systems, Agile, and Industrialization:

I definitely share Jeremy’s concern, but also think it’s important to stress that this isn’t an intrinsic issue with design systems, but rather the organizational culture that exists or gets built up around the design system. There’s a big difference between having smart, reusable patterns at your disposal and creating a dictatorial culture designed to enforce conformity and swat down anyone coloring outside the lines.

Brad makes a very apt comparison with Agile:

Not Agile the idea, but the actual Agile reality so many have to suffer through.

Agile can be a liberating empowering process, when done well. But all too often it’s a quagmire of requirements, burn rates, and story points. We need to make sure that design systems don’t suffer the same fate.

Jeremy’s thoughts on industrialization definitely struck a nerve. Sure, design systems have the ability to dehumanize and that’s something to actively watch out for. But I’d also say to pay close attention to the processes and organizational culture we take part in and contribute to.

Matthew Ström weighed in with a beautifully-written piece called Breaking looms. He provides historical context to the question of automation by relaying the story of the Luddite uprising. Automation may indeed be inevitable, according to his post, but he also provides advice on how to approach design systems today:

We can create ethical systems based in detailed user research. We can insist on environmental impact statements, diversity and inclusion initiatives, and human rights reports. We can write design principles, document dark patterns, and educate our colleagues about accessibility.

Finally, the ouroboros was complete when Frank wrote down his thoughts in a post called Who cares?. For him, the issue of maintenance and care is crucial:

Care applies to the built environment, and especially to digital technology, as social media becomes the weather and the tools we create determine the expectations of work to be done and the economic value of the people who use those tools. A well-made design system created for the right reasons is reparative. One created for the wrong reasons becomes a weapon for displacement. Tools are always beholden to values. This is well-trodden territory.

Well-trodden territory indeed. Back in 2015, Travis Gertz wrote about Design Machines:

Designing better systems and treating our content with respect are two wonderful ideals to strive for, but they can’t happen without institutional change. If we want to design with more expression and variation, we need to change how we work together, build design teams, and forge our tools.

Also on the topic of automation, in 2018 Cameron wrote about Design systems and technological disruption:

Design systems are certainly a new way of thinking about product development, and introduce a different set of tools to the design process, but design systems are not going to lessen the need for designers. They will instead increase the number of products that can be created, and hence increase the demand for designers.

And in 2019, Kaelig wrote:

In order to be fulfilled at work, Marx wrote that workers need “to see themselves in the objects they have created”.

When “improving productivity”, design systems tooling must be mindful of not turning their users’ craft into commodities, alienating them, like cogs in a machine.

All of this is reminding me of Kranzberg’s first law:

Technology is neither good nor bad; nor is it neutral.

I worry that sometimes the messaging around design systems paints them as an inherently positive thing. But design systems won’t fix your problems:

Just stay away from folks who try to convince you that having a design system alone will solve something.

It won’t.

It’s just the beginning.

At the same time, a design system need not be the gateway drug to some kind of post-singularity future where our jobs have been automated away.

As always, it depends.

Remember what Frank said:

A well-made design system created for the right reasons is reparative. One created for the wrong reasons becomes a weapon for displacement.

The reasons for creating a design system matter. Those reasons will probably reflect the values of the company creating the system. At the level of reasons and values, we’ve gone beyond the bounds of the hyperobject of design systems. We’re dealing in the area of design ops—the whys of systemising design.

This is why I’m so wary of selling the benefits of design systems in terms of consistency and efficiency. Those are obviously tempting money-saving benefits, but followed to their conclusion, they lead down the dark path of enforced compliance and eventually, automation.

But if the reason you create a design system is to empower people to be more creative, then say that loud and proud! I know that creativity, autonomy and empowerment is a tougher package to sell than consistency and efficiency, but I think it’s a battle worth fighting.

Design systems are neither good nor bad (nor are they neutral).

Addendum: I’d just like to say how invigorating it’s been to read the responses from Dave, Ethan, Brad, Matthew, and Frank …all of them writing on their own websites. Rumours of the demise of blogging may have been greatly exaggerated.

2019 in numbers

I posted to adactio.com 1,600 times in 2019: sparkline

In amongst those notes were:

If you like, you can watch all that activity plotted on a map.

map

Away from this website in 2019:

Words I wrote in 2019

I wrote just over one hundred blog posts in 2019. That’s even more than I wrote in 2018, which I’m very happy with.

Here are eight posts from during the year that I think are a good representative sample. I like how these turned out.

I hope that I’ll write as many blog posts in 2020.

I’m pretty sure that I will also continue to refer to them as blog posts, not blogs. I may be the last holdout of this nomenclature in 2020. I never planned to die on this hill, but here we are.

Actually, seeing as this is technically my journal rather than my blog, I’ll just call them journal entries.

Here’s to another year of journal entries.

The Web Share API in Safari on iOS

I implemented the Web Share API over on The Session back when it was first available in Chrome in Android. It’s a nifty and quite straightforward API that allows websites to make use of the “sharing drawer” that mobile operating systems provide from within a web browser.

I already had sharing buttons that popped open links to Twitter, Facebook, and email. You can see these sharing buttons on individual pages for tunes, recordings, sessions, and so on.

I was already intercepting clicks on those buttons. I didn’t have to add too much to also check for support for the Web Share API and trigger that instead:

if (navigator.share) {
  navigator.share(
    {
      title: document.querySelector('title').textContent,
      text: document.querySelector('meta[name="description"]').getAttribute('content'),
      url: document.querySelector('link[rel="canonical"]').getAttribute('href')
    }
  );
}

That worked a treat. As you can see, there are three fields you can pass to the share() method: title, text, and url. You don’t have to provide all three.

Earlier this year, Safari on iOS shipped support for the Web Share API. I didn’t need to do anything. ‘Cause that’s how standards work. You can make use of APIs before every browser supports them, and then your website gets better and better as more and more browsers add support.

But I recently discovered something interesting about the iOS implementation.

When the share() method is triggered, iOS provides multiple ways of sharing: Messages, Airdrop, email, and so on. But the simplest option is the one labelled “copy”, which copies to the clipboard.

Here’s the thing: if you’ve provided a text parameter to the share() method then that’s what’s going to get copied to the clipboard—not the URL.

That’s a shame. Personally, I think the url field should take precedence. But I don’t think this is a bug, per se. There’s nothing in the spec to say how operating systems should handle the data sent via the Web Share API. Still, I think it’s a bit counterintuitive. If I’m looking at a web page, and I opt to share it, then surely the URL is the most important piece of data?

I’m not even sure where to direct this feedback. I guess it’s under the purview of the Safari team, but it also touches on OS-level interactions. Either way, I hope that somebody at Apple will consider changing the current behaviour for copying Web Share data to the clipboard.

In the meantime, I’ve decided to update my code to remove the text parameter:

if (navigator.share) {
  navigator.share(
    {
      title: document.querySelector('title').textContent,
      url: document.querySelector('link[rel="canonical"]').getAttribute('href')
    }
  );
}

If the behaviour of Safari on iOS changes, I’ll reinstate the missing field.

By the way, if you’re making progressive web apps that have display: standalone in the web app manifest, please consider using the Web Share API. When you remove the browser chrome, you’re removing the ability for users to easily share URLs. The Web Share API gives you a way to reinstate that functionality.

A tiny lesson in query selection

We have a saying at Clearleft:

Everything is a tiny lesson.

I bet you learn something new every day, even if it’s something small. These small tips and techniques can easily get lost. They seem almost not worth sharing. But it’s the small stuff that takes the least effort to share, and often provides the most reward for someone else out there. Take for example, this great tip for getting assets out of Sketch that Cassie shared with me.

Cassie was working on a piece of JavaScript yesterday when we spotted a tiny lesson that tripped up both of us. The script was a fairly straightforward piece of DOM scripting. As a general rule, we do a sort of feature detection near the start of the script. Let’s say you’re using querySelector to get a reference to an element in the DOM:

var someElement = document.querySelector('.someClass');

Before going any further, check to make sure that the reference isn’t falsey (in other words, make sure that DOM node actually exists):

if (!someElement) return;

That will exit the script if there’s no element with a class of someClass on the page.

The situation that tripped us up was like this:

var myLinks = document.querySelectorAll('a.someClass');

if (!myLinks) return;

That should exit the script if there are no A elements with a class of someClass, right?

As it turns out, querySelectorAll is subtly different to querySelector. If you give querySelector a reference to non-existent element, it will return a value of null (I think). But querySelectorAll always returns an array (well, technically it’s a NodeList but same difference mostly). So if the selector you pass to querySelectorAll doesn’t match anything, it still returns an array, but the array is empty. That means instead of just testing for its existence, you need to test that it’s not empty by checking its length property:

if (!myLinks.length) return;

That’s a tiny lesson.

2018 in numbers

I posted to adactio.com 1,387 times in 2018: sparkline

In amongst those notes were:

In my blog posts, the top tags were:

  1. frontend and development (42 posts), sparkline
  2. serviceworkers (27 posts), sparkline
  3. design (20 posts), sparkline
  4. writing and publishing (19 posts), sparkline
  5. javascript (18 posts). sparkline

In my links, the top tags were:

  1. development (305 links), sparkline
  2. frontend (289 links), sparkline
  3. design (178 links), sparkline
  4. css (110 links), sparkline
  5. javascript (106 links). sparkline

When I wasn’t updating this site:

But these are just numbers. To get some real end-of-year thoughts, read posts by Remy, Andy, Ana, or Bill Gates.

Words I wrote in 2018

I wrote just shy of a hundred blog posts in 2018. That’s an increase from 2017. I’m happy about that.

Here are some posts that turned out okay…

A lot of my writing in 2018 was on technical topics—front-end development, service workers, and so on—but I should really make more of an effort to write about a wider range of topics. I always like when Zeldman writes about his glamourous life. Maybe in 2019 I’ll spend more time letting you know what I had for lunch.

I really enjoy writing words on this website. If I go too long between blog posts, I start to feel antsy. The only relief is to move my fingers up and down on the keyboard and publish something. Sounds like a bit of an addiction, doesn’t it? Well, as habits go, this is probably one of my healthier ones.

Thanks for reading my words in 2018. I didn’t write them for you—I wrote them for me—but it’s always nice when they resonate with others. I’ll keep on writing my brains out in 2019.

Service workers and videos in Safari

Alright, so I’ve already talked about some gotchas when debugging service worker issues. But what if you don’t even realise the problem has anything to do with your service worker?

This is not a hypothetical situation. I encountered this very thing myself. Gather ‘round the campfire, children…

One of the latest case studies on the Clearleft site is a nice write-up by Luke of designing a mobile app for Virgin Holidays. The case study includes a lovely video that demonstrates the log-in flow. I implemented that using a video element (with a poster image). Nice and straightforward. Super easy. All good.

But I hadn’t done my due diligence in browser testing (I guess I didn’t even think of it in this case). Hana informed me that the video wasn’t working at all in Safari. The poster image appeared just fine, but when you clicked on it, the video didn’t load.

I ducked, ducked, and went, uncovering what appeared to be the root of the problem. It seems that Safari is fussy about having servers support something called “byte-range requests”.

I had put the video in question on an Amazon S3 server. I came to the conclusion that S3 mustn’t support these kinds of headers correctly, or something.

Now I had a diagnosis. The next step was figuring out a solution. I thought I might have to move the video off of S3 and onto a server that I could configure a bit more.

Luckily, I never got ‘round to even starting that process. That’s good. Because it turns out that my diagnosis was completely wrong.

I came across a recent post by Phil Nash called Service workers: beware Safari’s range request. The title immediately grabbed my attention. Safari: yes! Video: yes! But service workers …wait a minute!

There’s a section in Phil’s post entitled “Diagnosing the problem”, in which he says:

I first thought it could have something to do with the CDN I’m using. There were some false positives regarding streaming video through a CDN that resulted in some extra research that was ultimately fruitless.

That described my situation exactly. Except Phil went further and nailed down the real cause of the problem:

Nginx was serving correct responses to Range requests. So was the CDN. The only other problem? The service worker. And this broke the video in Safari.

Doh! I hadn’t even thought about service workers!

Phil came up with a solution, and he has kindly shared his code.

I decided to go for a dumber solution:

if ( request.url.match(/\.(mp4)$/) ) {
  return;
}

That tells the service worker to just step out of the way when it comes to video requests. Now the video plays just fine in Safari. It’s a bit of a shame, because I’m kind of penalising all browsers for Safari’s bug, but the Clearleft site isn’t using much video at all, and in any case, it might be good not to fill up the cache with large video files.

But what’s more important than any particular solution is correctly identifying the problem. I’m quite sure I never would’ve been able to fix this issue if Phil hadn’t gone to the trouble of sharing his experience. I’m very, very grateful that he did.

That’s the bigger lesson here: if you solve a problem—even if you think it’s hardly worth mentioning—please, please share your solution. It could make all the difference for someone out there.

Several people are writing

Anne Gibson writes:

It sounds easy to make writing a habit, but like every other habit that doesn’t involve addictive substances like nicotine or dopamine it’s hard to start and easy to quit.

Alice Bartlett writes:

Anyway, here we are, on my blog, or in your RSS reader. I think I’ll do weaknotes. Some collections of notes. Sometimes. Not very well written probably. Generally written with the urgency of someone who is waiting for a baby wake up.

Patrick Rhone writes:

Bottom line; please place any idea worth more than 280 characters and the value Twitter places on them (which is zero) on a blog that you own and/or can easily take your important/valuable/life-changing ideas with you and make them easy for others to read and share.

Sara Soueidan writes:

What you write might help someone understand a concept that you may think has been covered enough before. We each have our own unique perspectives and writing styles. One writing style might be more approachable to some, and can therefore help and benefit a large (or even small) number of people in ways you might not expect.

Just write.

Even if only one person learns something from your article, you’ll feel great, and that you’ve contributed — even if just a little bit — to this amazing community that we’re all constantly learning from. And if no one reads your article, then that’s also okay. That voice telling you that people are just sitting somewhere watching our every step and judging us based on the popularity of our writing is a big fat pathetic attention-needing liar.

Laura Kalbag writes:

The web can be used to find common connections with folks you find interesting, and who don’t make you feel like so much of a weirdo. It’d be nice to be able to do this in a safe space that is not being surveilled.

Owning your own content, and publishing to a space you own can break through some of these barriers. Sharing your own weird scraps on your own site makes you easier to find by like-minded folks.

Brendan Dawes writes:

At times I think “will anyone reads this, does anyone care?”, but I always publish it anyway — and that’s for two reasons. First it’s a place for me to find stuff I may have forgotten how to do. Secondly, whilst some of this stuff is seemingly super-niche, if one person finds it helpful out there on the web, then that’s good enough for me. After all I’ve lost count of how many times I’ve read similar posts that have helped me out.

Robin Rendle writes:

My advice after learning from so many helpful people this weekend is this: if you’re thinking of writing something that explains a weird thing you struggled with on the Internet, do it! Don’t worry about the views and likes and Internet hugs. If you’ve struggled with figuring out this thing then be sure to jot it down, even if it’s unedited and it uses too many commas and you don’t like the tone of it.

Khoi Vinh writes:

Maybe you feel more comfortable writing in short, concise bullets than at protracted, grandiose length. Or maybe you feel more at ease with sarcasm and dry wit than with sober, exhaustive argumentation. Or perhaps you prefer to knock out a solitary first draft and never look back rather than polishing and tweaking endlessly. Whatever the approach, if you can do the work to find a genuine passion for writing, what a powerful tool you’ll have.

Amber Wilson writes:

I want to finally begin writing about psychology. A friend of mine shared his opinion that writing about this is probably best left to experts. I tried to tell him I think that people should write about whatever they want. He argued that whatever he could write about psychology has probably already been written about a thousand times. I told him that I’m going to be writer number 1001, and I’m going to write something great that nobody has written before.

Austin Kleon writes:

Maybe I’m weird, but it just feels good. It feels good to reclaim my turf. It feels good to have a spot to think out loud in public where people aren’t spitting and shitting all over the place.

Tim Kadlec writes:

I write to understand and remember. Sometimes that will be interesting to others, often it won’t be.

But it’s going to happen. Here, on my own site.

You write…

Service worker resources

At the end of my new book, Going Offline, I have a little collection of resources relating to service workers. Here’s how I introduce them:

If this book were a podcast, then this would be the point at which I would be imploring you to rate me on iTunes (or I’d be telling you about a really good mattress). Instead, I’d like to give you some hyperlinks so that you can explore some of the topics in this brief book in more detail.

It always feels a little strange to publish a list of hyperlinks in a physical book, so I figured I’d republish them here for easy access…

Explanations

Guides

Examples

Progressive web apps

Tools

Documentation

Posting to my site

I was idly thinking about the different ways I can post to adactio.com. I decided to count the ways.

Admin interface

This is the classic CMS approach. In my case the CMS is a crufty hand-rolled affair using PHP and MySQL that I wrote years ago. I log in to an admin interface and fill in a form, putting the text of my posts into a textarea. In truth, I usually write in a desktop text editor first, and then paste that into the textarea. That’s what I’m doing now—copying and pasting Markdown from the Typed app.

Directly from my site

If I’m logged in, I get a stripped down posting interface in the notes section of my site.

Notes posting interface

Bookmarklet

This is how I post links. When I’m at a URL I want to bookmark, I hit the “Bookmark it” bookmarklet in my browser’s bookmarks bar. That pops open a version of the admin interface tailored specifically for links. I really, really like bookmarklets. The one big downside is that they don’t work on mobile.

Text message

This is something I knocked together at Indie Web Camp Brighton 2015 using the Twilio API. It’s handy for posting notes if I’m travelling somewhere and data is at a premium. But I don’t use it that often.

Instagram

Thanks to Aaron’s OwnYourGram service—and the fact that my site has a micropub endpoint—I can post images from Instagram to my site. This used to happen instantaneously but Instagram changed their API rules for the worse. Between that and their shitty “algorithmic” timeline, I find myself using the service less and less. At this point I’m only on their for the doggos.

Swarm

Like OwnYourGram, Aaron’s OwnYourSwarm allows me to post check-ins and photos from the Swarm app to my site. Again, micropub makes it all possible.

OwnYourGram and OwnYourSwarm are very similar and could probably be abstracted into a generic service for posting from third-party apps to micropub endpoints. I’d quite like to post my check-ins on Untappd to my site.

Other people’s admin interfaces

Thanks to rel="me" and IndieAuth, I can log into other people’s posting interfaces using my own website as the log-in, and post to my micropub endpoint, like this. Quill is a good example of this. I don’t use it that much, but I really should—the editor interface is quite Medium-like in its design.

Anyway, those are the different ways I can update my website that I can think of right now.

Syndication

In terms of output, I’ve got a few different ways of syndicating what I post here:

Just so you know, if you comment on one of my posts on Facebook, I probably won’t see it. But if you reply to a copy of one of posts on Twitter or Instagram, it will show up over here on adactio.com thanks to the magic of Brid.gy and webmention.

Open source

Building and maintaining an open-source project is hard work. That observation is about as insightful as noting the religious affiliation of the pope or the scatological habits of woodland bears.

Nolan Lawson wrote a lengthy post describing what it feels like to be an open-source maintainer.

Outside your door stands a line of a few hundred people. They are patiently waiting for you to answer their questions, complaints, pull requests, and feature requests.

You want to help all of them, but for now you’re putting it off. Maybe you had a hard day at work, or you’re tired, or you’re just trying to enjoy a weekend with your family and friends.

But if you go to github.com/notifications, there’s a constant reminder of how many people are waiting

Most of the comments on the post are from people saying “Yup, I hear ya!”

Jan wrote a follow-up post called Sustainable Open Source: The Maintainers Perspective or: How I Learned to Stop Caring and Love Open Source:

Just because there are people with problems in front of your door, that doesn’t mean they are your problems. You can choose to make them yours, but you want to be very careful about what to care about.

There’s also help at hand in the shape of Open Source Guides created by Nadia Eghbal:

A collection of resources for individuals, communities, and companies who want to learn how to run and contribute to an open source project.

I’m sure Mark can relate to all of the tales of toil that come with being an open-source project maintainer. He’s been working flat-out on Fractal, sometimes at work, but often at home too.

Fractal isn’t really a Clearleft project, at least not in the same way that something like Silverback or UX London is. We’re sponsoring Fractal as much as we can, but an open-source project doesn’t really belong to anyone; everyone is free to fork it and take it. But I still want to make sure that Mark and Danielle have time at work to contribute to Fractal. It’s hard to balance that with the bill-paying client work though.

I invited Remy around to chat with them last week. It was really valuable. Mind you, Remy was echoing many of the same observations made in Nolan’s post about how draining this can be.

So nobody here is under any illusions that this open-source lark is to be entered into lightly. It can be a gruelling exercise. But then it can also be very, very rewarding. One kind word from somebody using your software can make your day. I was genuinely pleased as punch when Danish agency Shift sent Mark a gift to thank him for all his hard work on Fractal.

People can be pretty darn great (which I guess is an underlying principle of open source).

Deep linking with fragmentions

When I was marking up Resilient Web Design I wanted to make sure that people could link to individual sections within a chapter. So I added IDs to all the headings. There’s no UI to expose that though—like the hover pattern that some sites use to show that something is linkable—so unless you know the IDs are there, there’s no way of getting at them other than “view source.”

But if you’re reading a passage in Resilient Web Design and you highlight some text, you’ll notice that the URL updates to include that text after a hash symbol. If that updated URL gets shared, then anyone following it should be sent straight to that string of text within the page. That’s fragmentions in action:

Fragmentions find the first matching word or phrase in a document and focus its closest surrounding element. The match is determined by the case-sensitive string following the # (or ## double-hash)

It’s a similar idea to Eric and Simon’s proposal to use CSS selectors as fragment identifiers, but using plain text instead. You can find out more about the genesis of fragmentions from Kevin. I’m using Jonathon Neal’s script with some handy updates from Matthew.

I’m using the fragmention support to power the index of the book. It relies on JavaScript to work though, so Matthew has come to the rescue again and created a version of the site with IDs for each item linked from the index (I must get around to merging that).

The fragmention functionality is ticking along nicely with one problem…

I’ve tweaked the typography of Resilient Web Design to within an inch of its life, including a crude but effective technique to avoid widowed words at the end of a paragraph. The last two words of every paragraph are separated by a UTF-8 no-break space character instead of a regular space.

That solves the widowed words problem, but it confuses the fragmention script. Any selected text that includes the last two words of a paragraph fails to match. I’ve tried tweaking the script, but I’m stumped. If you fancy having a go, please have at it.

Update: And fixed! Thanks to Lee.

Exploring web technologies

Last week, I had two really enjoyable experiences discussing completely opposite ends of the web technology stack.

Tuesday is Codebar day here in Brighton. Clearleft hosted it at 68 Middle Street last week. I really, really enjoy coaching at Codebar. I particularly like teaching the absolute basics of HTML and CSS. There’s something so rewarding about seeing the “a-ha!” moments when concepts click with people. I also love answering the inevitable questions that arise, like “why is it like that?”, or “how do I do this?”

Fantastic coding tonight! Great to see you all. Thanks for coming and thanks @68MiddleSt & @clearleft for having us.

Thursday was devoted to the opposite end of the spectrum. I ran a workshop at Clearleft with some developers from one of our clients. The whole day was dedicated to exploring and evaluating up-and-coming web technologies. Basically, it was a chance to geek out about all the stuff I’ve been linking to or writing about. During the workshop I ended up making a lot of use of my tagging system here on adactio.com:

Prioritising topics for discussion.

Web components and service workers ended up at the top of the list of technologies to tackle, which was fortuitous, given my recent thoughts on comparing the two:

First of all, ask the question “who benefits from this technology?” In the case of service workers, it’s the end users. They get faster websites that handle network failure better. In the case of web components, there are no direct end-user benefits. Web components exist to make developers lives easier. That’s absolutely fine, but any developer convenience gained by the use of web components can’t come at the expense of the user—that price is too high.

The next question we usually ask when we’re evaluating a technology is “how well does it work?” Personally, I think it’s just as important to ask “how well does it fail?”

Those two questions turned out to be a good framework for the whole workshop. The question of how to evaluate technologies is something I’ve been thinking about a lot lately. I’m pretty sure it will be what my next conference talk is going to be all about.

You can read more about the structure of the workshop over on the Clearleft site. I’m looking forward to running it again sometime. But I’m equally looking forward to getting back to the basics at the next Codebar.

Independently published

Jessica writes about The Heroine’s Journey.

Remy explains Why I love working with the web.

Ludwig dreams of designers and developers working Together.

Charlotte documents her technique Teaching the order of margins in CSS.

Craig field-tests The Leica Q.

Robin thinks about The New Web Typography.

Michael dives deep into A Complete History of the Millennium Falcon.

What do they all have in common? Nothing …other than the fact that each person chose to write on their own website. I’m grateful for that. These are all wonderful pieces of writing—they deserve a long life.