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257 | 257 | The (Switch)-Case for State Machines in User Interfaces | You’re tasked with creating a login form. Email, password, submit button, done. “This will be easy,” you think to yourself. Login form by Selecto You’ve made similar forms many times in the past; it’s essentially muscle memory at this point. You’re working closely with a designer, who gives you a beautiful, detailed mockup of a login form. Sure, you’ll have to translate the pixels to meaningful, responsive CSS values, but that’s the least of your problems. As you’re writing up the HTML structure and CSS layout and styles for this form, you realize that you don’t know what the successful “logged in” page looks like. You remind the designer, who readily gives it to you. But then you start thinking more and more about how the login form is supposed to work. What if login fails? Where do those errors show up? Should we show errors differently if the user forgot to enter their email, or password, or both? Or should the submit button be disabled? Should we validate the email field? When should we show validation errors – as they’re typing their email, or when they move to the password field, or when they click submit? (Note: many, many login forms are guilty of this.) When should the errors disappear? What do we show during the login process? Some loading spinner? What if loading takes too long, or a server error occurs? Many more questions come up, and you (and your designer) are understandably frustrated. The lack of upfront specification opens the door to scope creep, which readily finds itself at home in all the unexplored edge cases. Modeling Behavior Describing all the possible user flows and business logic of an application can become tricky. Ironically, user stories might not tell the whole story – they often leave out potential edge-cases or small yet important bits of information. However, one important (and very old) mathematical model of computation can be used for describing the behavior and all possible states of a user interface: the finite state machine. The general idea, as it applies to user interfa… | 2018 | David Khourshid | davidkhourshid | 2018-12-12T00:00:00+00:00 | https://24ways.org/2018/state-machines-in-user-interfaces/ | code |
336 | 336 | Practical Microformats with hCard | You’ve probably heard about microformats over the last few months. You may have even read the easily digestible introduction at Digital Web Magazine, but perhaps you’ve not found time to actually implement much yet. That’s understandable, as it can sometimes be difficult to see exactly what you’re adding by applying a microformat to a page. Sure, you’re semantically enhancing the information you’re marking up, and the Semantic Web is a great idea and all, but what benefit is it right now, today? Well, the answer to that question is simple: you’re adding lots of information that can be and is being used on the web here and now. The big ongoing battle amongst the big web companies if one of territory over information. Everyone’s grasping for as much data as possible. Some of that information many of us are cautious to give away, but a lot of is happy to be freely available. Of the data you’re giving away, it makes sense to give it as much meaning as possible, thus enabling anyone from your friends and family to the giant search company down the road to make the most of it. Ok, enough of the waffle, let’s get working. Introducing hCard You may have come across hCard. It’s a microformat for describing contact information (or really address book information) from within your HTML. It’s based on the vCard format, which is the format the contacts/address book program on your computer uses. All the usual fields are available – name, address, town, website, email, you name it. If you’re running Firefox and Greasemonkey (or if you can, just to try this out), install this user script. What it does is look for instances of the hCard microformat in a page, and then add in a link to pass any hCards it finds to a web service which will convert it to a vCard. Take a look at the About the author box at the bottom of this article. It’s a hCard, so you should be able to click the icon the user script inserts and add me to your Outlook contacts or OS X Address Book with just a click. So microformats are useful after all. Free… | 2005 | Drew McLellan | drewmclellan | 2005-12-06T00:00:00+00:00 | https://24ways.org/2005/practical-microformats-with-hcard/ | code |
153 | 153 | JavaScript Internationalisation | or: Why Rudolph Is More Than Just a Shiny Nose Dunder sat, glumly staring at the computer screen. “What’s up, Dunder?” asked Rudolph, entering the stable and shaking off the snow from his antlers. “Well,” Dunder replied, “I’ve just finished coding the new reindeer intranet Santa Claus asked me to do. You know how he likes to appear to be at the cutting edge, talking incessantly about Web 2.0, AJAX, rounded corners; he even spooked Comet recently by talking about him as if he were some pushy web server. “I’ve managed to keep him happy, whilst also keeping it usable, accessible, and gleaming — and I’m still on the back row of the sleigh! But anyway, given the elves will be the ones using the site, and they come from all over the world, the site is in multiple languages. Which is great, except when it comes to the preview JavaScript I’ve written for the reindeer order form. Here, have a look…” As he said that, he brought up the textileRef:8234272265470b85d91702:linkStartMarker:“order form in French”:/examples/javascript-internationalisation/initial.fr.html on the screen. (Same in English). “Looks good,” said Rudolph. “But if I add some items,” said Dunder, “the preview appears in English, as it’s hard-coded in the JavaScript. I don’t want separate code for each language, as that’s just silly — I thought about just having if statements, but that doesn’t scale at all…” “And there’s more, you aren’t displaying large numbers in French properly, either,” added Rudolph, who had been playing and looking at part of the source code: function update_text() { var hay = getValue('hay'); var carrots = getValue('carrots'); var bells = getValue('bells'); var total = 50 * bells + 30 * hay + 10 * carrots; var out = 'You are ordering ' + pretty_num(hay) + ' bushel' + pluralise(hay) + ' of hay, ' + pretty_num(carrots) + ' carrot' + pluralise(carrots) + ', and ' + pretty_num(bells) + ' shiny bell' + pluralise(bells) + ', at a total cost of <strong>' + pretty_num(total) + '</strong> gold pieces. Thank you.';… | 2007 | Matthew Somerville | matthewsomerville | 2007-12-08T00:00:00+00:00 | https://24ways.org/2007/javascript-internationalisation/ | code |
70 | 70 | Bringing Your Code to the Streets | — or How to Be a Street VJ Our amazing world of web code is escaping out of the browser at an alarming rate and appearing in every aspect of the environment around us. Over the past few years we’ve already seen JavaScript used server-side, hardware coded with JavaScript, a rise of native style and desktop apps created with HTML, CSS and JavaScript, and even virtual reality (VR) is getting its fair share of front-end goodness. You can go ahead and play with JavaScript-powered hardware such as the Tessel or the Espruino to name a couple. Just check out the Tessel project page to see JavaScript in the world of coffee roasting or sleep tracking your pet. With the rise of the internet of things, JavaScript can be seen collecting information on flooding among other things. And if that’s not enough ‘outside the browser’ implementations, Node.js servers can even be found in aircraft! I previously mentioned VR and with three.js’s extra StereoEffect.js module it’s relatively simple to get browser 3D goodness to be Google Cardboard-ready, and thus set the stage for all things JavaScript and VR. It’s been pretty popular in the art world too, with interactive works such as Seb Lee-Delisle’s Lunar Trails installation, featuring the old arcade game Lunar Lander, which you can now play in your browser while others watch (it is the web after all). The Science Museum in London held Chrome Web Lab, an interactive exhibition featuring five experiments, showcasing the magic of the web. And it’s not even the connectivity of the web that’s being showcased; we can even take things offline and use web code for amazing things, such as fighting Ebola. One thing is for sure, JavaScript is awesome. Hell, if you believe those telly programs (as we all do), JavaScript can even take down the stock market, purely through the witchcraft of canvas! Go JavaScript! Now it’s our turn So I wanted to create a little project influenced by this theme, and as it’s Christmas, take it to the streets for a little bit of party fun! Something that could take c… | 2015 | Ruth John | ruthjohn | 2015-12-06T00:00:00+00:00 | https://24ways.org/2015/bringing-your-code-to-the-streets/ | code |
162 | 162 | Conditional Love | “Browser.” The four-letter word of web design. I mean, let’s face it: on the good days, when things just work in your target browsers, it’s marvelous. The air smells sweeter, birds’ songs sound more melodious, and both your design and your code are looking sharp. But on the less-than-good days (which is, frankly, most of them), you’re compelled to tie up all your browsers in a sack, heave them into the nearest river, and start designing all-imagemap websites. We all play favorites, after all: some will swear by Firefox, Opera fans are allegedly legion, and others still will frown upon anything less than the latest WebKit nightly. Thankfully, we do have an out for those little inconsistencies that crop up when dealing with cross-browser testing: CSS patches. Spare the Rod, Hack the Browser Before committing browsercide over some rendering bug, a designer will typically reach for a snippet of CSS fix the faulty browser. Historically referred to as “hacks,” I prefer Dan Cederholm’s more client-friendly alternative, “patches”. But whatever you call them, CSS patches all work along the same principle: supply the proper property value to the good browsers, while giving higher maintenance other browsers an incorrect value that their frustrating idiosyncratic rendering engine can understand. Traditionally, this has been done either by exploiting incomplete CSS support: #content { height: 1%; // Let's force hasLayout for old versions of IE. line-height: 1.6; padding: 1em; } html>body #content { height: auto; // Modern browsers get a proper height value. } or by exploiting bugs in their rendering engine to deliver alternate style rules: #content p { font-size: .8em; /* Hide from Mac IE5 \*/ font-size: .9em; /* End hiding from Mac IE5 */ } We’ve even used these exploits to serve up whole stylesheets altogether: @import url("core.css"); @media tty { i{content:"\";/*" "*/}} @import 'windows-ie5.css'; /*";} }/* */ The list goes on, and on, and on. For every browser, for every bug, there’s a patch availab… | 2007 | Ethan Marcotte | ethanmarcotte | 2007-12-15T00:00:00+00:00 | https://24ways.org/2007/conditional-love/ | code |
8 | 8 | Coding Towards Accessibility | “Can we make it AAA-compliant?” – does this question strike fear into your heart? Maybe for no other reason than because you will soon have to wade through the impenetrable WCAG documentation once again, to find out exactly what AAA-compliant means? I’m not here to talk about that. The Web Content Accessibility Guidelines are a comprehensive and peer-reviewed resource which we’re lucky to have at our fingertips. But they are also a pig to read, and they may have contributed to the sense of mystery and dread with which some developers associate the word accessibility. This Christmas, I want to share with you some thoughts and some practical tips for building accessible interfaces which you can start using today, without having to do a ton of reading or changing your tools and workflow. But first, let’s clear up a couple of misconceptions. Dreary, flat experiences I recently built a front-end framework for the Post Office. This was a great gig for a developer, but when I found out about my client’s stringent accessibility requirements I was concerned that I’d have to scale back what was quite a complex set of visual designs. Sites like Jakob Neilsen’s old workhorse useit.com and even the pioneering GOV.UK may have to shoulder some of the blame for this. They put a premium on usability and accessibility over visual flourish. (Although, in fairness to Mr Neilsen, his new site nngroup.com is really quite a snazzy affair, comparatively.) Of course, there are other reasons for these sites’ aesthetics — and it’s not because of the limitations of the form. You can make an accessible site look as glossy or as plain as you want it to look. It’s always our own ingenuity and attention to detail that are going to be the limiting factors. Synecdoche We must always guard against the tendency to assume that catering to screen readers means we have the whole accessibility ballgame covered. There’s so much more to accessibility than assistive technology, as you know. And within the field of assistive technology there ar… | 2013 | Charlie Perrins | charlieperrins | 2013-12-03T00:00:00+00:00 | https://24ways.org/2013/coding-towards-accessibility/ | code |
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