Tags: language

235

sparkline

Thursday, December 6th, 2018

Big ol’ Ball o’ JavaScript | Brad Frost

Backend logic? JavaScript. Styles? We do that in JavaScript now. Markup? JavaScript. Anything else? JavaScript.

Historically, different languages suggested different roles. “This language does style.” “This language does structure.” But now it’s “This JavaScript does style.” “This JavaScript does structure.” “This JavaScript does database queries.”

Monday, December 3rd, 2018

Programming CSS

There’s a worrying tendency for “real” programmers look down their noses at CSS. It’s just a declarative language, they point out, not a fully-featured programming language. Heck, it isn’t even a scripting language.

That may be true, but that doesn’t mean that CSS isn’t powerful. It’s just powerful in different ways to traditional languages.

Take CSS selectors, for example. At the most basic level, they work like conditional statments. Here’s a standard if statement:

if (condition) {
// code here
}

The condition needs to evaluate to true in order for the code in the curly braces to be executed. Sound familiar?

condition {
// styles here
}

That’s a very simple mapping, but what if the conditional statement is more complicated?

if (condition1 && condition2) {
// code here
}

Well, that’s what the decendant selector does:

condition1 condition2 {
// styles here
}

In fact, we can get even more specific than that by using the child combinator, the sibling combinator, and the adjacent sibling combinator:

  • condition1 > condition2
  • condition1 ~ condition2
  • condition2 + condition2

AND is just one part of Boolean logic. There’s also OR:

if (condition1 || condition2) {
// code here
}

In CSS, we use commas:

condition1, condition2 {
// styles here
}

We’ve even got the :not() pseudo-class to complete the set of Boolean possibilities. Once you add quantity queries into the mix, made possible by :nth-child and its ilk, CSS starts to look Turing complete. I’ve seen people build state machines using the adjacent sibling combinator and the :checked pseudo-class.

Anyway, my point here is that CSS selectors are really powerful. And yet, quite often we deliberately choose not to use that power. The entire raison d’être for OOCSS, BEM, and Smacss is to deliberately limit the power of selectors, restricting them to class selectors only.

On the face of it, this might seem like an odd choice. After all, we wouldn’t deliberately limit ourselves to a subset of a programming language, would we?

We would and we do. That’s what templating languages are for. Whether it’s PHP’s Smarty or Twig, or JavaScript’s Mustache, Nunjucks, or Handlebars, they all work by providing a deliberately small subset of features. Some pride themselves on being logic-less. If you find yourself trying to do something that the templating language doesn’t provide, that’s a good sign that you shouldn’t be trying to do it in the template at all; it should be in the controller.

So templating languages exist to enforce simplicity and ensure that the complexity happens somewhere else. It’s a similar story with BEM et al. If you find you can’t select something in the CSS, that’s a sign that you probably need to add another class name to the HTML. The complexity is confined to the markup in order to keep the CSS more straightforward, modular, and maintainable.

But let’s not forget that that’s a choice. It’s not that CSS in inherently incapable of executing complex conditions. Quite the opposite. It’s precisely because CSS selectors (and the cascade) are so powerful that we choose to put guard rails in place.

Thursday, November 22nd, 2018

Great Leap Years - Official site of Stephen Fry

I just binge-listened to the six episodes of the first season of this podcast from Stephen Fry—it’s excellent!

It covers the history of communication from the emergence of language to the modern day. At first I was worried that it was going to rehash some of the more questionable ideas in the risible Sapiens, but it turned out to be far more like James Gleick’s The Information or Tom Standage’s The Victorian Internet (two of my favourite books on the history of technology).

There’s no annoying sponsorship interruptions and the whole series feels more like an audiobook than a podcast—an audiobook researched, written and read by Stephen Fry!

Wednesday, November 21st, 2018

᚛ᚈᚑᚋ ᚄᚉᚑᚈᚈ᚜ and ᚛ᚑᚌᚐᚋ᚜ - YouTube

When is a space not a space?

Tom talks about ogham stones and unicode.

᚛ᚈᚑᚋ ᚄᚉᚑᚈᚈ᚜ and ᚛ᚑᚌᚐᚋ᚜

Thursday, October 4th, 2018

Declaration

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>

Straightaway, that covers 80%-90% of use cases. But if you need to do more—like, provide your own custom controls—there’s a corresponding API that’s exposed in JavaScript. Using that API, you can do everything that you can do with the HTML element, and a whole lot more besides.

It’s a similar story with animation. CSS provides plenty of animation power, but it’s limited in the events that can trigger the animations. That’s okay. There’s a corresponding JavaScript API that gives you more power. Again, the CSS declarations cover 80%-90% of use cases, but for anyone in that 10%-20%, the web animation API is there to help.

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 />

When we need more fine-grained control, there’s a validation API available in JavaScript (yes, yes, I know that the API itself is problematic, but you get the point).

I really like this design pattern. Cover 80% of the use cases with a declarative solution in HTML, but also provide an imperative alternative in JavaScript that gives more power. HTML5 has plenty of examples of this pattern. But I feel like the history of web standards has a few missed opportunities too.

Geolocation is a good example of an unbalanced feature. If you want to use it, you must use JavaScript. There is no declarative alternative. This doesn’t exist:

<input type="geolocation" />

That’s a shame. Anyone writing a form that asks for the user’s location—in order to submit that information to a server for processing—must write some JavaScript. That’s okay, I guess, but it’s always going to be that bit more fragile and error-prone compared to markup.

(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.)

Geolocation is an interesting use case because it only works on HTTPS. There are quite a few JavaScript APIs that quite rightly require a secure context—like service workers—but I can’t think of a single HTML element or attribute that requires HTTPS (although that will soon change if we don’t act to stop plans to create a two-tier web). But that can’t have been the thinking behind geolocation being JavaScript only; when geolocation first shipped, it was available over HTTP connections too.

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.

In recent years there’s been a push to expose low-level browser features to developers. They’re inevitably exposed as JavaScript APIs. In most cases, that makes total sense. I can’t really imagine a declarative way of accessing the fetch or cache APIs, for example. But I think we should be careful that it doesn’t become the only way of exposing new browser features. I think that, wherever possible, the design pattern of exposing new features declaratively and imperatively offers the best of the both worlds—ease of use for the simple use cases, and power for the more complex use cases.

Previously, it was up to browser makers to think about these things. But now, with the advent of web components, we developers are gaining that same level of power and responsibility. So if you’re making a web component that you’re hoping other people will also use, maybe it’s worth keeping this design pattern in mind: allow authors to configure the functionality of the component using HTML attributes and JavaScript methods.

Tuesday, October 2nd, 2018

Use the words normal people use

When you’re struggling to write something that sounds clear and sounds human (two of the essential basics of a good blog post, I’d argue), just use the words normal people would use.

John Spencer: “There’s no bullshit like design bullshit” - Design Week

If we use jargon, we reveal our insecurity. If we use pretentious language, we expose our arrogance. But if we use language that anyone can understand, people are much more likely to value what we do.

Friday, September 28th, 2018

Letterform Archive – From the Collection: Blissymbolics

The fascinating story of Charles K. Bliss and his symbolic language:

The writing system – originally named World Writing in 1942, then Semantography in 1947, and finally Blissymoblics in the 1960s – contains several hundred basic geometric symbols (“Bliss-characters”) that can be combined in different ways to represent more complex concepts (“Bliss-words”). For example, the Bliss-characters for “house” and “medical” are combined to form the Bliss-word for “hospital” or “clinic”. The modular structure invites comparison to the German language; the German word for “hospital ” – “krankenhaus” – translates directly to “sick house”.

Friday, August 10th, 2018

PWA: Progressive Web All-the-things - Tales of a Developer Advocate by Paul Kinlan

Very valuable observations from Paul on his travels, talking to developers and business people about progressive web apps—there’s some confusion out there.

My personal feeling is that everyone is really hung up on the A in PWA: ‘App’. It’s the success and failure of the branding of the concept; ‘App’ is in the name, ‘App’ is in the conscious of many users and businesses and so the associations are quite clear.

Tuesday, August 7th, 2018

Seriously, though. What is a progressive web app? – Amberley Romo – Medium

What an excellent question! And what an excellent bit of sleuthing to get to the bottom of it. This is like linguistic spelunking on the World Wide Web.

Oh, and of course I love the little sidenote at the end.

Tuesday, July 10th, 2018

A better metaphor for technology - The Verge

The ideas and images that come to mind when you think of technology as an instrument are more useful than if you think of it as a tool. Instruments — I’m specifically talking about musical instruments — are a way to create culture.

You approach instruments with a set of expectations and associations that are more humane. It’s built into their very purpose. Instruments are meant to make something for other people, not making things. When you use an instrument, you have an expectation that it is going to take effort to use it well. Using an instrument takes practice. You form a relationship with that object. It becomes part of your identity that you make something with it. You tune it. You understand that there’s no such thing as a “best” guitar in the same way that there’s not necessarily a “best” phone.

Friday, July 6th, 2018

Insult Generator

Testing the theory that putting the word “total”, “complete”, or “absolute” in front of any noun automatically makes for an excellent insult.

Thursday, July 5th, 2018

Preserving mother tongues

Hui Jing describes her motivation for creating the lovely Penang Hokkien site:

People who grew up their whole lives in a community that spoke the same mother tongue as themselves would probably find this hard to relate to, but it really was something else to hear my mother tongue streaming out of the speakers of my computer.

She ends with an impassioned call for more local language websites:

If the Internet is meant to enhance the free flow of information and ideas across the world, then creation of content on the web should not largely be limited to English-speaking communities.

Tuesday, June 12th, 2018

Resilient, Declarative, Contextual

This is really good breakdown of what’s different about CSS (compared to other languages).

These differences may feel foreign, but it’s these differences that make CSS so powerful. And it’s my suspicion that developers who embrace these things, and have fully internalized them, tend to be far more proficient in CSS.

Sunday, June 3rd, 2018

The React is “just” JavaScript Myth - daverupert.com

In my experience, there’s no casual mode within React. You need to be all-in, keeping up with the ecosystem, or else your knowledge evaporates.

I think Dave is right. At this point, it’s possible to be a React developer exclusively.

React is an ecosystem. I feel like it’s a disservice to anyone trying to learn to diminish all that React entails. React shows up on the scene with Babel, Webpack, and JSX (which each have their own learning curve) then quickly branches out into technologies like Redux, React-Router, Immutable.js, Axios, Jest, Next.js, Create-React-App, GraphQL, and whatever weird plugin you need for your app.

And, as Jake points out, you either need to go all in or not at all—you can’t really incrementally add Reactness to an existing project.

Monday, May 7th, 2018

What’s in a pattern name? — Ethan Marcotte

Ethan emphasises the importance of making a shared language the heart of any design system. I heartily agree!

This isn’t new thinking, mind: folks like Alla Kholmatova and Charlotte Jackson have been talking about this for ages. (And in doing so, they’ve massively influenced how I think about modular, pattern-driven design.)

Wednesday, April 18th, 2018

Brutalist design is the bad influence we all need

What these brands are taking from web-brutalism — and truly, we should all be learning something here — is that User-centered design doesn’t need to be monopolized by the same colors, same buttons, same photography and even same copy you see in pretty much every single website or product.

Friday, April 13th, 2018

Monzo – Tone of Voice

Monzo’s guidelines for tone of voice, including a reference to “the curse of knowledge.”

Thursday, April 12th, 2018

Notes on `lang` by Taylor Hunt on CodePen

A really deep dive into the lang attribute, and the :lang() pseudo-class (hitherto unknown to me). This is all proving really useful for a little side project I’m working on.

Wednesday, April 4th, 2018

A typeface is not a tool · Klim Type Foundry

Conceding that a typeface is a tool sounds dangerously close to an excuse: toolmakers cannot be held responsible for things made with their tools, or the tasks leading up to those things. They are only responsible for the making of the tool itself. If a person decides to use a hammer to drive home a screw, then so be it. The hammer was only designed for nails. It’s not our fault the typography doesn’t look good. The typeface is just a tool — you’re using it wrong.