I like the robustness that comes with declarative languages. I also like the power that comes with imperative languages. Best of all, I like having the choice.
Take the video and audio elements, for example. If you want, you can embed a video or audio file into a web page using a straightforward declaration in HTML.
<audio src="..." controls><!-- fallback goes here --></audio>
Client-side form validation is another good example. For most us, the HTML attributes—required, type, etc.—are probably enough most of the time.
<input type="email" required />
<input type="geolocation" />
(And just in case you’re thinking of the fallback—which would be for the input element to be rendered as though its type value were text—and you think it’s ludicrous to expect users with non-supporting browsers to enter latitude and longitude coordinates by hand, I direct your attention to input type="color": in non-supporting browsers, it’s rendered as input type="text" and users are expected to enter colour values by hand.)
Anyway, that’s just one example. Like I said, it’s not that I’m in favour of declarative solutions instead of imperative ones; I strongly favour the choice offered by providing declarative solutions as well as imperative ones.
This is an excellent initiative by the Dutch Fronteers group to have professional web developers represented in W3C working groups. In this particular case, they’re funding Rachel for the CSS working group. This sets a great precedent—I really hope the W3C goes for it!
Sally takes a long hard look at permissions on the web. It’s a fascinating topic because of all the parties involved—browsers, developers, and users.
In order to do permissions well, I think there are two key areas to think about - what’s actually being requested, and how it’s being requested.
Is a site being intrusive with what they can potentially learn about me (say, wanting my precise location when it’s unnecessary)? Or is it being intrusive in terms of how they interact with me (popping up a lot of notifications and preventing me from quickly completing my intended task)? If one of those angles doesn’t work well, then regardless of whether the other is acceptable to someone, they’re likely to start opting out and harbouring negative feelings.
The long-standing difficulties of styling fieldset and legend are finally getting addressed …although I’m a little shocked that the solution involves extending -webkit-appearance. I think that, at this point, we should be trying to get rid of vendor prefixes from the web once and for all, not adding to them. Still, needs must, I suppose.
At least, they don’t physically exist. They are intangible.
They’re in good company.
Feelings are intangible, but real. Hope. Despair.
Ideas are intangible: liberty, justice, socialism, capitalism.
The economy. Currency. All intangible. I’m sure we’ve all had those “college thoughts”:
Money isn’t real, man! They’re just bits of metal and pieces of paper ! Wake up, sheeple!
Nations are intangible. Geographically, France is a tangible, physical place. But France, the Republic, is an idea. Geographically, North America is a real, tangible, physical land mass. But ideas like “Canada” and “The United States” only exist in our minds.
Faith—the feeling—is intangible.
God—the idea—is intangible.
Art—the concept—is intangible.
A piece of art is an insantiation of the intangible concept of what art is.
Incidentally, I quite like Brian Eno’s working definition of what art is. Art is anything we don’t have to do. We don’t have to make paintings, or sculptures, or films, or music. We have to clothe ourselves for practical reasons, but we don’t have to make clothes beautiful. We have to prepare food to eat it, but don’t have to make it a joyous event.
By this definition, sports are also art. We don’t have to play football. Sports are also intangible.
A game of football is an instantiation of the intangible idea of what football is.
Football, chess, rugby, quiditch and rollerball are equally (in)tangible.
But football, chess and rugby have more consensus.
(Christianity, Islam, Judaism, and The Force are equally intangible, but Christianity, Islam, and Judaism have a bit more consensus than The Force).
HTML is intangible.
A web page is an instantiation of the intangible idea of what HTML is.
But we can document our shared consensus.
A rule book for football is like a web standard specification. A documentation of consensus.
By the way, economics, religions, sports and laws are all examples of intangibles that can’t be proven, because they all rely on their own internal logic—there is no outside data that can prove football or Hinduism or capitalism to be “true”. That’s very different to ideas like gravity, evolution, relativity, or germ theory—they are all intangible but provable. They are discovered, rather than created. They are part of objective reality.
Consensus reality is the collection of intangibles that we collectively agree to be true: economy, religion, law, web standards.
We treat consensus reality much the same as we treat objective reality: in our minds, football, capitalism, and Christianity are just as real as buildings, trees, and stars.
Sometimes consensus reality and objective reality get into fights.
Some people have tried to make a consensus reality around the accuracy of astrology or the efficacy of homeopathy, or ideas like the Earth being flat, 9-11 being an inside job, the moon landings being faked, the holocaust never having happened, or vaccines causing autism. These people are unfazed by objective reality, which disproves each one of these ideas.
For a long time, the consensus reality was that the sun revolved around the Earth. Copernicus and Galileo demonstrated that the objective reality was that the Earth (and all the other planets in our solar system) revolve around the sun. After the dust settled on that particular punch-up, we switched up our consensus reality. We changed the story.
That’s another way of thinking about consensus reality: our currencies, our religions, our sports and our laws are stories that we collectively choose to believe.
Web standards are a collection of intangibles that we collectively agree to be true. They’re our stories. They’re our collective consensus reality. They are what web browsers agree to implement, and what we agree to use.
The web is agreement.
For human beings to collaborate together, they need a shared purpose. They must have a shared consensus reality—a shared story.
Once a group of people share a purpose, they can work together to establish principles.
Design principles are points of agreement. There are design principles underlying every human endeavour. Sometimes they are tacit. Sometimes they are written down.
Patterns emerge from principles.
Here’s an example of a human endeavour: the creation of a nation state, like the United States of America.
The purpose is agreed in the declaration of independence.
The principles are documented in the constitution.
The patterns emerge in the form of laws.
Here’s one of the design principles behind HTML5. It’s my personal favourite—the priority of constituencies:
In case of conflict, consider users over authors over implementors over specifiers over theoretical purity.
“In case of conflict”—that’s exactly what a good design principle does! It establishes the boundaries of agreement. If you disagree with the design principles of a project, there probably isn’t much point contributing to that project.
Also, it’s reversible. You could imagine a different project that favoured theoretical purity above all else. In fact, that’s pretty much what XHTML 2 was all about.
XHTML 1 was simply HTML reformulated with the syntax of XML: lowercase tags, lowercase attributes, always quoting attribute values.
Remember HTML doesn’t care whether tags and attributes are uppercase or lowercase, or whether you put quotes around your attribute values. You can even leave out some closing tags.
So XHTML 1 was actually kind of a nice bit of agreement: professional web developers agreed on using lowercase tags and attributes, and we agreed to quote our attributes. Browsers didn’t care one way or the other.
But XHTML 2 was going to take the error-handling model of XML and apply it to HTML. This is the error handling model of XML: if the parser encounters a single error, don’t render the document.
Of course nobody agreed to this. Browsers didn’t agree to implement XHTML 2. Developers didn’t agree to use it. It ceased to exist.
It turns out that creating a format is relatively straightforward. But how do you turn something into a standard? The really hard part is getting agreement.
Sturgeon’s Law states:
90% of everything is crap.
Coincidentally, 90% is also the percentage of the world’s crap that gets transported by ocean. Your clothes, your food, your furniture, your electronics …chances are that at some point they were transported within an intermodal container.
These shipping containers are probably the most visible—and certainly one of the most important—standards in the physical world. Before the use of intermodal containers, loading and unloading cargo from ships was a long, laborious, and dangerous task.
Along came Malcom McLean who realised that the whole process could be made an order of magnitude more efficient if the cargo were stored in containers that could be moved from ship to truck to train.
But he wasn’t the only one. The movement towards containerisation was already happening independently around the world. But everyone was using different sized containers with different kinds of fittings. If this continued, the result would be a tower of Babel instead of smoothly running global logistics.
Malcolm McLean and his engineer Keith Tantlinger designed two crate sizes—20ft and 40ft—that would work for ships, trucks, and trains. Their design also incorporated an ingenious twistlock mechanism to secure containers together. But the extra step that would ensure that their design would win out was this: Tantlinger convinced McLean to give up the patent rights.
This wasn’t done out of any hippy-dippy ideology. These were hard-nosed businessmen. But they understood that a rising tide raises all boats, and they wanted all boats to be carrying the same kind of containers.
Without the threat of a patent lurking beneath the surface, ready to torpedo the potential benefits, the intermodal container went on to change the world economy. (The world economy is very large and intangible.)
The World Wide Web also ended up changing the world economy, and much more besides. And like the intermodal container, the World Wide Web is patent-free.
Again, this was a pragmatic choice to help foster adoption. When Tim Berners-Lee and his colleague Robert Cailleau were trying to get people to use their World Wide Web project they faced some stiff competition. Lots of people were already using Gopher. Anyone remember Gopher?
The seemingly unstoppable growth of the Gopher protocol was somewhat hobbled in the early ’90s when the University of Minnesota announced that it was going to start charging fees for using it. This was a cautionary lesson for Berners-Lee and Cailleau. They wanted to make sure that CERN didn’t make the same mistake.
On April 30th, 1993, the code for the World Wide Project was made freely available.
This is for everyone.
If you’re trying to get people to adopt a standard or use a new hypertext system, the biggest obstacle you’re going to face is inertia. As the brilliant computer scientist Grace Hopper used to say:
The most dangerous phrase in the English language is “We’ve always done it this way.”
Rear Admiral Grace Hopper waged war on business as usual. She was well aware how abritrary business as usual is. Business as usual is simply the current state of our consensus reality. She said:
Humans are allergic to change.
I try to fight that.
That’s why I have a clock on my wall that runs counter‐clockwise.
Our clocks are a perfect example of a ubiquitous but arbitrary convention. Why should clocks run clockwise rather than counter-clockwise?
One neat explanation is that clocks are mimicing the movement of a shadow across the face of a sundial …in the Northern hemisphere. Had clocks been invented in the Southern hemisphere, they would indeed run counter-clockwise.
But on the clock face itself, why do we carve up time into 24 hours? Why are there 60 minutes in an hour? Why are there are 60 seconds in a minute?
It probably all goes back to Babylonian accountants. Early cuneiform tablets show that they used a sexagecimal system for counting—that’s because 60 is the lowest number that can be divided evenly by 6, 5, 4, 3, 2, and 1.
But we don’t count in base 60; we count in base 10. That in itself is arbitrary—we just happen to have a total of ten digits on our hands.
So if the sexagesimal system of telling time is an accident of accounting, and base ten is more widespread, why don’t we switch to a decimal timekeeping system?
It has been tried. The French revolution introduced not just a new decimal calendar—much neater than our base 12 calendar—but also decimal time. Each day had ten hours. Each hour had 100 minutes. Each minute had 100 seconds. So much better!
It didn’t take. Humans are allergic to change. Sexagesimal time may be arbitrary and messy but …we’ve always done it this way.
Incidentally, this is also why I’m not holding my breath in anticipation of the USA ever switching to the metric system.
Instead of trying to completely change people’s behaviour, you’re likely to have more success by incrementally and subtly altering what people are used to.
That was certainly the case with the World Wide Web.
The Hypertext Transfer Protocol sits on top of the existing TCP/IP stack.
The key building block of the web is the URL. But instead of creating an entirely new addressing scheme, the web uses the existing Domain Name System.
Then there’s the lingua franca of the World Wide Web. These elements probably look familiar to you:
You recognise this language, right? That’s right—it’s SGML. Standard Generalised Markup Language.
Specifically, it’s CERN SGML—a flavour of SGML that was already popular at CERN when Tim Berners-Lee was working on the World Wide Project. He used this vocabulary as the basis for the HyperText Markup Language.
Because this vocabulary was already familiar to people at CERN, convincing them to use HTML wasn’t too much of a hard sell. They could take an existing SGML document, change the file extension to .htm and it would work in one of those new fangled web browsers.
In fact, HTML worked better than expected. The initial idea was that HTML pages would be little more than indices that pointed to other files containing the real meat and potatoes of content—spreadsheets, word processing documents, whatever. But to everyone’s surprise, people started writing and publishing content in HTML.
Was HTML the best format? Far from it. But it was just good enough and easy enough to get the job done.
It has since changed, but that change has happened according to another design principle:
Evolution, not revolution
From its humble beginnings with the handful of elements borrowed from CERN SGML, HTML has grown to encompass an additional 100 elements over its lifespan. And yet, it’s still technically the same format!
This is a classic example of the paradox called the Ship Of Theseus, also known as Trigger’s Broom.
You can take an HTML document written over two decades ago, and open it in a browser today.
Even more astonishing, you can take an HTML document written today and open it in a browser from two decades ago. That’s because the error-handling model of HTML has always been to simply ignore any tags it doesn’t recognise and render the content inside them.
That pattern of behaviour is a direct result of the design principle:
…document conformance requirements should be designed so that Web content can degrade gracefully in older or less capable user agents, even when making use of new elements, attributes, APIs and content models.
Here’s a picture from 2006.
That’s me in the cowboy hat—the picture was taken in Austin, Texas. This is an impromptu gathering of people involved in the microformats community.
Microformats, like any other standards, are sets of agreements. In this case, they’re agreements on which class values to use to mark up some of the missing elements from HTML—people, places, and events. That’s pretty much it.
And yes, they do have design principles—some very good ones—but that’s not why I’m showing this picture.
Some of the people in this picture—Tantek Çelik, Ryan King, and Chris Messina—were involved in the creation of BarCamp, a series of grassroots geek gatherings.
BarCamps sound like they shouldn’t work, but they do. The schedule for the event is arrived at collectively at the beginning of the gathering. It’s kind of amazing how the agreement emerges—rough consensus and running events.
In the run-up to a BarCamp in 2007, Chris Messina posted this message to the fledgeling social networking site, twitter.com:
how do you feel about using # (pound) for groups. As in #barcamp [msg]?
This was when tagging was all the rage. We were all about folksonomies back then. Chris proposed that we would call this a “hashtag”.
I wasn’t a fan:
Thinking that hashtags disrupt the reading flow of natural language. Sorry @factoryjoe
But it didn’t matter what I thought. People agreed to this convention, and after a while Twitter began turning the hashtagged words into links.
In doing so, they were following another HTML design principle:
Pave the cowpaths
It sounds like advice for agrarian architects, but its meaning is clarified:
When a practice is already widespread among authors, consider adopting it rather than forbidding it or inventing something new.
Twitter had previously paved a cowpath when people started prefacing usernames with the @ symbol. That convention didn’t come from Twitter, but they didn’t try to stop it. They rolled with it, and turned any username prefaced with an @ symbol into a link.
The @ symbol made sense because people were used to using it from email. The choice to use that symbol in email addresses was made by Ray Tomlinson. He needed a symbol to separate the person and the domain, looked down at his keyboard, saw the @ symbol, and thought “that’ll do.”
Perhaps Chris followed a similar process when he proposed the symbol for the hashtag.
It could have just as easily been called a “number tag” or “octothorpe tag” or “pound tag”.
This symbol started life as a shortcut for “pound”, or more specifically “libra pondo”, meaning a pound in weight. Libra pondo was abbreviated to lb when written. That got turned into a ligature ℔ when written hastily. That shape was the common ancestor of two symbols we use today: £ and #.
The eight-pointed symbol was (perhaps jokingly) renamed the octothorpe in the 1960s when it was added to telephone keypads. It’s still there on the digital keypad of your mobile phone. If you were to ask someone born in this millenium what that key is called, they would probably tell you it’s the hashtag key. And if they’re learning to read sheet music, I’ve heard tell that they refer to the sharp notes as hashtag notes.
If this upsets you, you might be the kind of person who rages at the word “literally” being used to mean “figuratively” or supermarkets with aisles for “10 items or less” instead of “10 items or fewer”.
Tough luck. The English language is agreement. That’s why English dictionaries exist not to dictate usage of the language, but to document usage.
It’s much the same with web standards bodies. They don’t carve the standards into tablets of stone and then come down the mountain to distribute them amongst the browsers. No, it’s what the browsers implement that gets carved in stone. That’s why it’s so important that browsers are in agreement. In the bad old days of the browser wars of the late 90s, we saw what happened when browsers implemented their own proprietary features.
Standards require interoperability.
Interoperability requires agreement.
So what we can learn from the history of standardisation?
Well, there are some direct lessons from the HTML design principles.
The priority of constituencies
Consider users over authors…
Listen, I want developer convenience as much as the next developer. But never at the expense of user needs.
I’ve often said that if I have the choice between making something my problem, and making it the user’s problem, I’ll make it my problem every time. That’s the job.
I worry that these days developer convenience is sometimes prized more highly than user needs. I think we could all use a priority of constituencies on every project we work on, and I would hope that we would prioritise users over authors.
Web content can degrade gracefully in older or less capable user agents…
I know that I go on about progressive enhancement a lot. Sometimes I make it sound like a silver bullet. Well, it kinda is.
I mean, you can’t just buy a bullet made of silver—you have to make it yourself. If you’re not used to crafting bullets from silver, it will take some getting used to.
Again, if developer convenience is your priority, silver bullets are hard to justify. But if you’re prioritising users over authors, progressive enhancement is the logical methodology to use.
Evolution, not revolution
It’s a testament to the power and flexibility of the web that we don’t have to build with progressive enhancement. We don’t have to build with a separation of concerns like structure, presentation, and behaviour.
But why do that? Is it because those native buttons and dropdowns might be inconsistent from browser to browser.
Consistency is not the purpose of the world wide web.
Universality is the key principle underlying the web.
Our patterns should reflect the intent of the medium.
Use what the browser gives you—build on top of those agreements. Because that’s the bigger lesson to be learned from the history of web standards, clocks, containers, and hashtags.
Our world is made up of incremental improvements to what has come before. And that’s how we will push forward to a better tomorrow: By building on top of what we already have instead of trying to create something entirely from scratch. And by working together to get agreement instead of going it alone.
The future can be a frightening prospect, and I often get people asking me for advice on how they should prepare for the web’s future. Usually they’re thinking about which programming language or framework or library they should be investing their time in. But these specific patterns matter much less than the broader principles of working together, collaborating and coming to agreement. It’s kind of insulting that we refer to these as “soft skills”—they couldn’t be more important.
Working on the web, it’s easy to get downhearted by the seemingly ephemeral nature of what we build. None of it is “real”; none of it is tangible. And yet, looking at the history of civilisation, it’s the intangibles that survive: ideas, philosophies, culture and concepts.
The future can be frightening because it is intangible and unknown. But like all the intangible pieces of our consensus reality, the future is something we construct …through agreement.
Now let’s agree to go forward together to build the future web!
The beauty of this approach is that the site doesn’t ever appear broken and the user won’t even be aware that they are getting the ‘default’ experience. With progressive enhancement, every user has their own experience of the site, rather than an experience that the designers and developers demand of them.
A case study in applying progressive enhancement to all aspects of a site.
A great long-term perspective from Rachel on the pace of change in standards getting shipped in browsers:
The pace that things are shipping, and at which bugs are fixed is like nothing we have seen before. I know from sitting around a table with representatives from each browser vendor at the CSS Working Group how important interop is. No-one wants features to be implemented differently in browsers. This is what we were asking for with WaSP, and despite the new complexity of the platform, browsers rendering standard features in different ways is becoming increasingly rare. Bugs happen, sometimes in the browser and sometimes in the spec, but there is a commitment to avoid these and to create a stable platform we can all rely on. It is exciting to be part of it.
This great post by Hui Jing is ostensibly about CSS shapes and exclusions, but there’s a much broader message too:
Build demos, and play around with anything that seems remotely interesting. Even if that feature is in early stages, or only supported by 1 browser. And then talk about it, or write and tweet about your experience, your use cases, what you liked or disliked about it.
We can shape the web to what we want it to be, but only if we get involved.
Andy describes the technical approach he took building his handy reporting tool, My Browser:
Although the site is built with bleeding edge technology such as web components, it’s built with a progressive-first approach. This means that in order to get the best experience, you need to be on a modern browser, but to do the most basic function—reporting data, you can still do it by pressing a “generate report” button, which is the default state.
Not only is this a liberating way to work, it really pays off in performance:
We’re given so much for free to make a progressively enhanced website or web app. We’ve got feature detection and @supports in CSS which means that “My Browser” ships with no polyfills, fallbacks or hacks like Autoprefixer. The app degrades gracefully instead.
This has been a very refreshing way to work that I’ve enjoyed a lot. The fact that the whole thing comes in around 25kb tells you how effective progressive enhancement can be for performance too.
As Jeremy notes, the usefulness of a tool like Autoprefixer is diminishing, which is a good thing. It is becoming far easier to code in a way that supports all browsers, where support means usable in an appropriate way for the technology the user has in front of them. Embrace that, and be glad for the fact that we can reduce complexity based on the increasing interoperability of CSS in our browsers.
When I was in Boston, speaking on a lunchtime panel with Rachel at An Event Apart, we took some questions from the audience about CSS grid. Inevitably, a question about browser support came up—specifically about support in Internet Explorer 11.
(Technically, you can use CSS grid in IE11—in fact it was the first browser to ship a version of grid—but the prefixed syntax is different to the standard and certain features are missing.)
Rachel gave a great balanced response, saying that you need to look at your site’s stats to determine whether it’s worth the investment of your time trying to make a grid work in IE11.
My response was blunter. I said I just don’t consider IE11 as a browser that supports grid.
Now, that might sound harsh, but what I meant was: you’re already dividing your visitors into browsers that support grid, and browsers that don’t …and you’re giving something to those browsers that don’t support grid. So I’m suggesting that IE11 falls into that category and should receive the layout you’re giving to browsers that don’t support grid …because really, IE11 doesn’t support grid: that’s the whole reason why the syntax is namespaced by -ms.
You could jump through hoops to try to get your grid layout working in IE11, as detailed in a three-part series on CSS Tricks, but at that point, the amount of effort you’re putting in negates the time-saving benefits of using CSS grid in the first place.
Frankly, the whole point of prefixed CSS is that is not used after a reasonable amount of time (originally, the idea was that it would not be used in production, but that didn’t last long). As we’ve moved away from prefixes to flags in browsers, I’m seeing the amount of prefixed properties dropping, and that’s very, very good. I’ve stopped using autoprefixer on new projects, and I’ve been able to remove it from some existing ones—please consider doing the same.
And when it comes to IE11, I’ll continue to categorise it as a browser that doesn’t support CSS grid. That doesn’t mean I’m abandoning users of IE11—far from it. It means I’m giving them the layout that’s appropriate for the browser they’re using.
A good explanation of web components, complete with some code examples.
Web Components are not a single technology. Instead, they are series of browser standards defined by the W3C allowing developers to build components in a way the browser can natively understand. These standards include:
HTML Templates and Slots – Reusable HTML markup with entry points for user-specific markup
Shadow DOM – DOM encapsulation for markup and styles
Custom Elements – Defining named custom HTML elements with specific behaviour
Jake’s blow-by-blow account of uncovering a serious browser vulnerability is fascinating. But if you don’t care for the technical details, skip ahead to to how different browser makers handled the issue—it’s very enlightening. (And if you do care for the technical details, make sure you click on the link to the PDF version of this post.)
So if you’re reading Going Offline, when you get to the bit about someday using the rel value, you can cast a wistful gaze into the distance, or shed a tiny tear for what might have been …and then put it out of your mind and carry on reading.