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| 322 | 322 | Introduction to Scriptaculous Effects | Gather around kids, because this year, much like in that James Bond movie with Denise Richards, Christmas is coming early… in the shape of scrumptuous smooth javascript driven effects at your every whim. Now what I’m going to do, is take things down a notch. Which is to say, you don’t need to know much beyond how to open a text file and edit it to follow this article. Personally, I for instance can’t code to save my life. Well, strictly speaking, that’s not entirely true. If my life was on the line, and the code needed was really simple and I wasn’t under any time constraints, then yeah maybe I could hack my way out of it But my point is this: I’m not a programmer in the traditional sense of the word. In fact, what I do best, is scrounge code off of other people, take it apart and then put it back together with duct tape, chewing gum and dumb blind luck. No, don’t run! That happens to be a good thing in this case. You see, we’re going to be implementing some really snazzy effects (which are considerably more relevant than most people are willing to admit) on your site, and we’re going to do it with the aid of Thomas Fuchs’ amazing Script.aculo.us library. And it will be like stealing candy from a child. What Are We Doing? I’m going to show you the very basics of implementing the Script.aculo.us javascript library’s Combination Effects. These allow you to fade elements on your site in or out, slide them up and down and so on. Why Use Effects at All? Before get started though, let me just take a moment to explain how I came to see smooth transitions as something more than smoke and mirror-like effects included for with little more motive than to dazzle and make parents go ‘uuh, snazzy’. Earlier this year, I had the good fortune of meeting the kind, gentle and quite knowledgable Matt Webb at a conference here in Copenhagen where we were both speaking (though I will be the first to admit my little talk on Open Source Design was vastly inferior to Matt’s talk). Matt held a talk called Fixing Broken Windows (b… | 2005 | Michael Heilemann | michaelheilemann | 2005-12-12T00:00:00+00:00 | https://24ways.org/2005/introduction-to-scriptaculous-effects/ | code |
| 212 | 212 | Refactoring Your Way to a Design System | I love refactoring code. Absolutely love it. There’s something about taking a piece of UI or a bit of code and reworking it in a way that is simpler, modular, and reusable that makes me incredibly happy. I also love design systems work. It gives hybrids like me a home. It seems like everyone is talking about design systems right now. Design systems teams are perfect for those who enjoy doing architectural work and who straddle the line between designer and developer. Una Kravets recently identified some of the reasons that design systems fail, and chief among them are lack of buy-in, underlying architecture, and communication. While it’s definitely easier to establish these before project work begins, that doesn’t mean it is the only path to success. It’s a privilege to work on a greenfield project, and one that is not afforded to many. Companies with complex and/or legacy codebases may not be able to support a full rewrite of their product. In addition, many people feel overwhelmed at the thought of creating a complete system and are at a loss of how or where to even begin the process. This is where refactoring comes into play. According to Martin Fowler, “refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal structure.” It’s largely invisible work, and if you do it right, the end user will never know the difference. What it will do is provide a decent foundation to begin more systematic work. Build a solid foundation When I was first asked to create Pantsuit, the design system for Hillary for America, I was tasked with changing our codebase to be more modular and scalable, without changing the behavior or visual design of the UI. We needed a system in place that would allow for the rapid creation of new projects while maintaining a consistent visual language. In essence, I was asked to refactor our code into a design system. During that refactor, I focused the majority of my efforts on creating a scalable arch… | 2017 | Mina Markham | minamarkham | 2017-12-23T00:00:00+00:00 | https://24ways.org/2017/refactoring-your-way-to-a-design-system/ | code |
| 180 | 180 | Going Nuts with CSS Transitions | I’m going to show you how CSS 3 transforms and WebKit transitions can add zing to the way you present images on your site. Laying the foundations First we are going to make our images look like mini polaroids with captions. Here’s the markup: <div class="polaroid pull-right"> <img src="../img/seal.jpg" alt=""> <p class="caption">Found this little cutie on a walk in New Zealand!</p> </div> You’ll notice we’re using a somewhat presentational class of pull-right here. This means the logic is kept separate from the code that applies the polaroid effect. The polaroid class has no positioning, which allows it to be used generically anywhere that the effect is required. The pull classes set a float and add appropriate margins—they can be used for things like blockquotes as well. .polaroid { width: 150px; padding: 10px 10px 20px 10px; border: 1px solid #BFBFBF; background-color: white; -webkit-box-shadow: 2px 2px 3px rgba(135, 139, 144, 0.4); -moz-box-shadow: 2px 2px 3px rgba(135, 139, 144, 0.4); box-shadow: 2px 2px 3px rgba(135, 139, 144, 0.4); } The actual polaroid effect itself is simply applied using padding, a border and a background colour. We also apply a nice subtle box shadow, using a property that is supported by modern WebKit browsers and Firefox 3.5+. We include the box-shadow property last to ensure that future browsers that support the eventual CSS3 specified version natively will use that implementation over the legacy browser specific version. The box-shadow property takes four values: three lengths and a colour. The first is the horizontal offset of the shadow—positive values place the shadow on the right, while negative values place it to the left. The second is the vertical offset, positive meaning below. If both of these are set to 0, the shadow is positioned equally on all four sides. The last length value sets the blur radius—the larger the number, the blurrier the shadow (therefore the darker you need to make the colour to have an effect). The colour value can be given in any forma… | 2009 | Natalie Downe | nataliedowne | 2009-12-14T00:00:00+00:00 | https://24ways.org/2009/going-nuts-with-css-transitions/ | code |
| 256 | 256 | Develop Your Naturalist Superpowers with Observable Notebooks and iNaturalist | We’re going to level up your knowledge of what animals you might see in an area at a particular time of year - a skill every naturalist* strives for - using technology! Using iNaturalist and Observable Notebooks we’re going to prototype seasonality graphs for particular species in an area, and automatically create a guide to what animals you might see in each month. *(a Naturalist is someone who likes learning about nature, not someone who’s a fan of being naked, that’s a ‘Naturist’… different thing!) Looking for critters in rocky intertidal habitats One of my favourite things to do is going rockpooling, or as we call it over here in California, ‘tidepooling’. Amounting to the same thing, it’s going to a beach that has rocks where the tide covers then uncovers little pools of water at different times of the day. All sorts of fun creatures and life can be found in this ‘rocky intertidal habitat’ A particularly exciting creature that lives here is the Nudibranch, a type of super colourful ‘sea slug’. There are over 3000 species of Nudibranch worldwide. (The word “nudibranch” comes from the Latin nudus, naked, and the Greek βρανχια / brankhia, gills.) They are however quite tricky to find! Even though they are often brightly coloured and interestingly shaped, some of them are very small, and in our part of the world in the Bay Area in California their appearance in our rockpools is seasonal. We see them more often in Summer months, despite the not-as-low tides as in our Winter and Spring seasons. My favourite place to go tidepooling here is Pillar Point in Half Moon bay (at other times of the year more famously known for the surf competition ‘Mavericks’). The rockpools there are rich in species diversity, of varied types and water-coverage habitat zones as well as being relatively accessible. I was rockpooling at Pillar Point recently with my parents and we talked to a lady who remarked that she hadn’t seen any Nudibranchs on her visit this time. I realised that having an idea of what species to find where, a… | 2018 | Natalie Downe | nataliedowne | 2018-12-18T00:00:00+00:00 | https://24ways.org/2018/observable-notebooks-and-inaturalist/ | code |
| 126 | 126 | Intricate Fluid Layouts in Three Easy Steps | The Year of the Script may have drawn attention away from CSS but building fluid, multi-column, cross-browser CSS layouts can still be as unpleasant as a lump of coal. Read on for a worry-free approach in three quick steps. The layout system I developed, YUI Grids CSS, has three components. They can be used together as we’ll see, or independently. The Three Easy Steps Choose fluid or fixed layout, and choose the width (in percents or pixels) of the page. Choose the size, orientation, and source-order of the main and secondary blocks of content. Choose the number of columns and how they distribute (for example 50%-50% or 25%-75%), using stackable and nestable grid structures. The Setup There are two prerequisites: We need to normalize the size of an em and opt into the browser rendering engine’s Strict Mode. Ems are a superior unit of measure for our case because they represent the current font size and grow as the user increases their font size setting. This flexibility—the container growing with the user’s wishes—means larger text doesn’t get crammed into an unresponsive container. We’ll use YUI Fonts CSS to set the base size because it provides consistent-yet-adaptive font-sizes while preserving user control. The second prerequisite is to opt into Strict Mode (more info on rendering modes) by declaring a Doctype complete with URI. You can choose XHTML or HTML, and Transitional or Strict. I prefer HTML 4.01 Strict, which looks like this: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> Including the CSS A single small CSS file powers a nearly-infinite number of layouts thanks to a recursive system and the interplay between the three distinct components. You could prune to a particular layout’s specific needs, but why bother when the complete file weighs scarcely 1.8kb uncompressed? Compressed, YUI Fonts and YUI Grids combine for a miniscule 0.9kb over the wire. You could save an HTTP request by concatenating the two CSS files, or by adding their contents … | 2006 | Nate Koechley | natekoechley | 2006-12-20T00:00:00+00:00 | https://24ways.org/2006/intricate-fluid-layouts/ | code |
| 75 | 75 | A Harder-Working Class | Class is only becoming more important. Focusing on its original definition as an attribute for grouping (or classifying) as well as linking HTML to CSS, recent front-end development practices are emphasizing class as a vessel for structured, modularized style packages. These patterns reduce the need for repetitive declarations that can seriously bloat file sizes, and instil human-readable understanding of how the interface, layout, and aesthetics are constructed. In the next handful of paragraphs, we will look at how these emerging practices – such as object-oriented CSS and SMACSS – are pushing the relevance of class. We will also explore how HTML and CSS architecture can be further simplified, performance can be boosted, and CSS utility sharpened by combining class with the attribute selector. A primer on attribute selectors While attribute selectors were introduced in the CSS 2 spec, they are still considered rather exotic. These well-established and well-supported features give us vastly improved flexibility in targeting elements in CSS, and offer us opportunities for smarter markup. With an attribute selector, you can directly style an element based on any of its unique – or uniquely shared – attributes, without the need for an ID or extra classes. Unlike pseudo-classes, pseudo-elements, and other exciting features of CSS3, attribute selectors do not require any browser-specific syntax or prefix, and are even supported in Internet Explorer 7. For example, say we want to target all anchor tags on a page that link to our homepage. Where otherwise we might need to manually identify and add classes to the HTML for these specific links, we could simply write: [href=index.html] { } This selector reads: target every element that has an href attribute of “index.html”. Attribute selectors are more faceted, though, as they also give us some very simple regular expression-like logic that helps further narrow (or widen) a selector’s scope. In our previous example, what if we wanted to also give indicative styl… | 2012 | Nathan Ford | nathanford | 2012-12-15T00:00:00+00:00 | https://24ways.org/2012/a-harder-working-class/ | code |
| 91 | 91 | Infinite Canvas: Moving Beyond the Page | Remember Web 2.0? I do. In fact, that phrase neatly bifurcates my life on the internet. Pre-2.0, I was occupied by chatting on AOL and eventually by learning HTML so I could build sites on Geocities. Around 2002, however, I saw a WYSIWYG demo in Dreamweaver. The instructor was dragging boxes and images around a canvas. With a few clicks he was able to build a dynamic, single-page interface. Coming from the world of tables and inline HTML styles, I was stunned. As I entered college the next year, the web was blossoming: broadband, Wi-Fi, mobile (proud PDA owner, right here), CSS, Ajax, Bloglines, Gmail and, soon, Google Maps. I was a technology fanatic and a hobbyist web developer. For me, the web had long been informational. It was now rapidly becoming something else, something more: sophisticated, presentational, actionable. In 2003 we watched as the internet changed. The predominant theme of those early Web 2.0 years was the withering of Internet Explorer 6 and the triumph of web standards. Upon cresting that mountain, we looked around and collectively breathed the rarefied air of pristine HMTL and CSS, uncontaminated by toxic hacks and forks – only to immediately begin hurtling down the other side at what is, frankly, terrifying speed. Ten years later, we are still riding that rocket. Our days (and nights) are spent cramming for exams on CSS3 and RWD and Sass and RESS. We are the proud, frazzled owners of tiny pocket computers that annihilate the best laptops we could have imagined, and the architects of websites that are no longer restricted to big screens nor even segregated by device. We dragoon our sites into working any time, anywhere. At this point, we can hardly ask the spec developers to slow down to allow us to catch our breath, nor should we. It is, without a doubt, a most wonderful time to be a web developer. But despite the newfound luxury of rounded corners, gradients, embeddable fonts, low-level graphics APIs, and, glory be, shadows, the canyon between HTML and native appears to be as wide as… | 2012 | Nathan Peretic | nathanperetic | 2012-12-21T00:00:00+00:00 | https://24ways.org/2012/infinite-canvas-moving-beyond-the-page/ | code |
| 188 | 188 | Don't Lose Your :focus | For many web designers, accessibility conjures up images of blind users with screenreaders, and the difficulties in making sites accessible to this particular audience. Of course, accessibility covers a wide range of situations that go beyond the extreme example of screenreader users. And while it’s true that making a complex site accessible can often be a daunting prospect, there are also many small things that don’t take anything more than a bit of judicious planning, are very easy to test (without having to buy expensive assistive technology), and can make all the difference to certain user groups. In this short article we’ll focus on keyboard accessibility and how careless use of CSS can potentially make your sites completely unusable. Keyboard Access Users who for whatever reason can’t use a mouse will employ a keyboard (or keyboard-like custom interface) to navigate around web pages. By default, they will use TAB and SHIFT + TAB to move from one focusable element (links, form controls and area) of a page to the next. Note: in OS X, you’ll first need to turn on full keyboard access under System Preferences > Keyboard and Mouse > Keyboard Shortcuts. Safari under Windows needs to have the option Press Tab to highlight each item on a webpage in Preferences > Advanced enabled. Opera is the odd one out, as it has a variety of keyboard navigation options – the most relevant here being spatial navigation via Shift+Down, Shift+Up, Shift+Left, and Shift+Right). But I Don’t Like Your Dotted Lines… To show users where they are within a page, browsers place an outline around the element that currently has focus. The “problem” with these default outlines is that some browsers (Internet Explorer and Firefox) also display them when a user clicks on a focusable element with the mouse. Particularly on sites that make extensive use of image replacement on links with “off left” techniques this can create very unsightly outlines that stretch from the replaced element all the way to the left edge of the browser. Outline … | 2009 | Patrick Lauke | patricklauke | 2009-12-09T00:00:00+00:00 | https://24ways.org/2009/dont-lose-your-focus/ | code |
| 331 | 331 | Splintered Striper | Back in March 2004, David F. Miller demonstrated a little bit of DOM scripting magic in his A List Apart article Zebra Tables. His script programmatically adds two alternating CSS background colours to table rows, making them more readable and visually pleasing, while saving the document author the tedious task of manually assigning the styling to large static data tables. Although David’s original script performs its duty well, it is nonetheless very specific and limited in its application. It only: works on a single table, identified by its id, with at least a single tbody section assigns a background colour allows two colours for odd and even rows acts on data cells, rather than rows, and then only if they have no class or background colour already defined Taking it further In a recent project I found myself needing to apply a striped effect to a medium sized unordered list. Instead of simply modifying the Zebra Tables code for this particular case, I decided to completely recode the script to make it more generic. Being more general purpose, the function in my splintered striper experiment is necessarily more complex. Where the original script only expected a single parameter (the id of the target table), the new function is called as follows: striper('[parent element tag]','[parent element class or null]','[child element tag]','[comma separated list of classes]') This new, fairly self-explanatory function: targets any type of parent element (and, if specified, only those with a certain class) assigns two or more classes (rather than just two background colours) to the child elements inside the parent preserves any existing classes already assigned to the child elements See it in action View the demonstration page for three usage examples. For simplicity’s sake, we’re making the calls to the striper function from the body’s onload attribute. In a real deployment situation, we would look at attaching a behaviour to the onload programmatically — just remember that, as we need to pass varia… | 2005 | Patrick Lauke | patricklauke | 2005-12-15T00:00:00+00:00 | https://24ways.org/2005/splintered-striper/ | code |
| 36 | 36 | Naming Things | There are only two hard things in computer science: cache invalidation and naming things. Phil Karlton Being a professional web developer means taking responsibility for the code you write and ensuring it is comprehensible to others. Having a documented code style is one means of achieving this, although the size and type of project you’re working on will dictate the conventions used and how rigorously they are enforced. Working in-house may mean working with multiple developers, perhaps in distributed teams, who are all committing changes – possibly to a significant codebase – at the same time. Left unchecked, this codebase can become unwieldy. Coding conventions ensure everyone can contribute, and help build a product that works as a coherent whole. Even on smaller projects, perhaps working within an agency or by yourself, at some point the resulting product will need to be handed over to a third party. It’s sensible, therefore, to ensure that your code can be understood by those who’ll eventually take ownership of it. Put simply, code is read more often than it is written or changed. A consistent and predictable naming scheme can make code easier for other developers to understand, improve and maintain, presumably leaving them free to worry about cache invalidation. Let’s talk about semantics Names not only allow us to identify objects, but they can also help us describe the objects being identified. Semantics (the meaning or interpretation of words) is the cornerstone of standards-based web development. Using appropriate HTML elements allows us to create documents and applications that have implicit structural meaning. Thanks to HTML5, the vocabulary we can choose from has grown even larger. HTML elements provide one level of meaning: a widely accepted description of a document’s underlying structure. It’s only with the mutual agreement of browser vendors and developers that <p> indicates a paragraph. Yet (with the exception of widely accepted microdata and microformat schemas) only HTML elements co… | 2014 | Paul Lloyd | paulrobertlloyd | 2014-12-21T00:00:00+00:00 | https://24ways.org/2014/naming-things/ | code |
| 79 | 79 | Responsive Images: What We Thought We Needed | If you were to read a web designer’s Christmas wish list, it would likely include a solution for displaying images responsively. For those concerned about users downloading unnecessary image data, or serving images that look blurry on high resolution displays, finding a solution has become a frustrating quest. Having experimented with complex and sometimes devilish hacks, consensus is forming around defining new standards that could solve this problem. Two approaches have emerged. The <picture> element markup pattern was proposed by Mat Marquis and is now being developed by the Responsive Images Community Group. By providing a means of declaring multiple sources, authors could use media queries to control which version of an image is displayed and under what conditions: <picture width="500" height="500"> <source media="(min-width: 45em)" src="large.jpg"> <source media="(min-width: 18em)" src="med.jpg"> <source src="small.jpg"> <img src="small.jpg" alt=""> <p>Accessible text</p> </picture> A second proposal put forward by Apple, the srcset attribute, uses a more concise syntax intended for use with the <img> element, although it could be compatible with the <picture> element too. This would allow authors to provide a set of images, but with the decision on which to use left to the browser: <img src="fallback.jpg" alt="" srcset="small.jpg 640w 1x, small-hd.jpg 640w 2x, med.jpg 1x, med-hd.jpg 2x "> Enter Scrooge Men’s courses will foreshadow certain ends, to which, if persevered in, they must lead. Ebenezer Scrooge Given the complexity of this issue, there’s a heated debate about which is the best option. Yet code belies a certain truth. That both feature verbose and opaque syntax, I’m not sure either should find its way into the browser – especially as alternative approaches have yet to be fully explored. So, as if to dampen the festive cheer, here are five reasons why I believe both proposals are largely redundant. 1. We need better formats, not more markup As we move away from designs defi… | 2012 | Paul Lloyd | paulrobertlloyd | 2012-12-11T00:00:00+00:00 | https://24ways.org/2012/responsive-images-what-we-thought-we-needed/ | code |
| 121 | 121 | Hide And Seek in The Head | If you want your JavaScript-enhanced pages to remain accessible and understandable to scripted and noscript users alike, you have to think before you code. Which functionalities are required (ie. should work without JavaScript)? Which ones are merely nice-to-have (ie. can be scripted)? You should only start creating the site when you’ve taken these decisions. Special HTML elements Once you have a clear idea of what will work with and without JavaScript, you’ll likely find that you need a few HTML elements for the noscript version only. Take this example: A form has a nifty bit of Ajax that automatically and silently sends a request once the user enters something in a form field. However, in order to preserve accessibility, the user should also be able to submit the form normally. So the form should have a submit button in noscript browsers, but not when the browser supports sufficient JavaScript. Since the button is meant for noscript browsers, it must be hard-coded in the HTML: <input type="submit" value="Submit form" id="noScriptButton" /> When JavaScript is supported, it should be removed: var checkJS = [check JavaScript support]; window.onload = function () { if (!checkJS) return; document.getElementById('noScriptButton').style.display = 'none'; } Problem: the load event Although this will likely work fine in your testing environment, it’s not completely correct. What if a user with a modern, JavaScript-capable browser visits your page, but has to wait for a huge graphic to load? The load event fires only after all assets, including images, have been loaded. So this user will first see a submit button, but then all of a sudden it’s removed. That’s potentially confusing. Fortunately there’s a simple solution: play a bit of hide and seek in the <head>: var checkJS = [check JavaScript support]; if (checkJS) { document.write('<style>#noScriptButton{display: none}</style>'); } First, check if the browser supports enough JavaScript. If it does, document.write an extra <style> element that hides the b… | 2006 | Peter-Paul Koch | ppk | 2006-12-06T00:00:00+00:00 | https://24ways.org/2006/hide-and-seek-in-the-head/ | code |
| 68 | 68 | Grid, Flexbox, Box Alignment: Our New System for Layout | Three years ago for 24 ways 2012, I wrote an article about a new CSS layout method I was excited about. A specification had emerged, developed by people from the Internet Explorer team, bringing us a proper grid system for the web. In 2015, that Internet Explorer implementation is still the only public implementation of CSS grid layout. However, in 2016 we should be seeing it in a new improved form ready for our use in browsers. Grid layout has developed hidden behind a flag in Blink, and in nightly builds of WebKit and, latterly, Firefox. By being developed in this way, breaking changes could be safely made to the specification as no one was relying on the experimental implementations in production work. Another new layout method has emerged over the past few years in a more public and perhaps more painful way. Shipped prefixed in browsers, The flexible box layout module (flexbox) was far too tempting for developers not to use on production sites. Therefore, as changes were made to the specification, we found ourselves with three different flexboxes, and browser implementations that did not match one another in completeness or in the version of specified features they supported. Owing to the different ways these modules have come into being, when I present on grid layout it is often the very first time someone has heard of the specification. A question I keep being asked is whether CSS grid layout and flexbox are competing layout systems, as though it might be possible to back the loser in a CSS layout competition. The reality, however, is that these two methods will sit together as one system for doing layout on the web, each method playing to certain strengths and serving particular layout tasks. If there is to be a loser in the battle of the layouts, my hope is that it will be the layout frameworks that tie our design to our markup. They have been a necessary placeholder while we waited for a true web layout system, but I believe that in a few years time we’ll be easily able to date a website to circa 2015 … | 2015 | Rachel Andrew | rachelandrew | 2015-12-15T00:00:00+00:00 | https://24ways.org/2015/grid-flexbox-box-alignment-our-new-system-for-layout/ | code |
| 95 | 95 | Giving Content Priority with CSS3 Grid Layout | Browser support for many of the modules that are part of CSS3 have enabled us to use CSS for many of the things we used to have to use images for. The rise of mobile browsers and the concept of responsive web design has given us a whole new way of looking at design for the web. However, when it comes to layout, we haven’t moved very far at all. We have talked for years about separating our content and source order from the presentation of that content, yet most of us have had to make decisions on source order in order to get a certain visual layout. Owing to some interesting specifications making their way through the W3C process at the moment, though, there is hope of change on the horizon. In this article I’m going to look at one CSS module, the CSS3 grid layout module, that enables us to define a grid and place elements on to it. This article comprises a practical demonstration of the basics of grid layout, and also a discussion of one way in which we can start thinking of content in a more adaptive way. Before we get started, it is important to note that, at the time of writing, these examples work only in Internet Explorer 10. CSS3 grid layout is a module created by Microsoft, and implemented using the -ms prefix in IE10. My examples will all use the -ms prefix, and not include other prefixes simply because this is such an early stage specification, and by the time there are implementations in other browsers there may be inconsistencies. The implementation I describe today may well change, but is also there for your feedback. If you don’t have access to IE10, then one way to view and test these examples is by signing up for an account with Browserstack – the free trial would give you time to have a look. I have also included screenshots of all relevant stages in creating the examples. What is CSS3 grid layout? CSS3 grid layout aims to let developers divide up a design into a grid and place content on to that grid. Rather than trying to fabricate a grid from floats, you can declare an actual grid on a c… | 2012 | Rachel Andrew | rachelandrew | 2012-12-18T00:00:00+00:00 | https://24ways.org/2012/css3-grid-layout/ | code |
| 192 | 192 | Cleaner Code with CSS3 Selectors | The parts of CSS3 that seem to grab the most column inches on blogs and in articles are the shiny bits. Rounded corners, text shadow and new ways to achieve CSS layouts are all exciting and bring with them all kinds of possibilities for web design. However what really gets me, as a developer, excited is a bit more mundane. In this article I’m going to take a look at some of the ways our front and back-end code will be simplified by CSS3, by looking at the ways we achieve certain visual effects now in comparison to how we will achieve them in a glorious, CSS3-supported future. I’m also going to demonstrate how we can use these selectors now with a little help from JavaScript – which can work out very useful if you find yourself in a situation where you can’t change markup that is being output by some server-side code. The wonder of nth-child So why does nth-child get me so excited? Here is a really common situation, the designer would like the tables in the application to look like this: Setting every other table row to a different colour is a common way to enhance readability of long rows. The tried and tested way to implement this is by adding a class to every other row. If you are writing the markup for your table by hand this is a bit of a nuisance, and if you stick a row in the middle you have to change the rows the class is applied to. If your markup is generated by your content management system then you need to get the server-side code to add that class – if you have access to that code. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Striping every other row - using classes</title> <style type="text/css"> body { padding: 40px; margin: 0; font: 0.9em Arial, Helvetica, sans-serif; } table { border-collapse: collapse; border: 1px solid #124412; width: 600px; } th { border: 1px solid #124412; background-color: #334f33; color: #fff; padding: 0.4em; text-… | 2009 | Rachel Andrew | rachelandrew | 2009-12-20T00:00:00+00:00 | https://24ways.org/2009/cleaner-code-with-css3-selectors/ | code |
| 214 | 214 | Christmas Gifts for Your Future Self: Testing the Web Platform | In the last year I became a CSS specification editor, on a mission to revitalise CSS Multi-column layout. This has involved learning about many things, one of which has been the Web Platform Tests project. In this article, I’m going to share what I’ve learned about testing the web platform. I’m also going to explain why I think you might want to get involved too. Why test? At one time or another it is likely that you have been frustrated by an issue where you wrote some valid CSS, and one browser did one thing with it and another something else entirely. Experiences like this make many web developers feel that browser vendors don’t work together, or they are actively doing things in a different way to one another to the detriment of those of us who use the platform. You’ll be glad to know that isn’t the case, and that the people who work on browsers want things to be consistent just as much as we do. It turns out however that interoperability, which is the official term for “works in all browsers”, is hard. Thanks to web-platform-tests, a test from another browser vendor just found genuine bug in our code before we shipped 😻— Brian Birtles (@brianskold) February 10, 2017 In order for W3C Specifications to move on to become W3C Recommendations we need to have interoperable implementations. 6.2.4 Implementation Experience Implementation experience is required to show that a specification is sufficiently clear, complete, and relevant to market needs, to ensure that independent interoperable implementations of each feature of the specification will be realized. While no exhaustive list of requirements is provided here, when assessing that there is adequate implementation experience the Director will consider (though not be limited to): is each feature of the current specification implemented, and how is this demonstrated? are there independent interoperable implementations of the current specification? are there implementations created by people other than the authors of the specification? are implementations publi… | 2017 | Rachel Andrew | rachelandrew | 2017-12-10T00:00:00+00:00 | https://24ways.org/2017/testing-the-web-platform/ | code |
| 243 | 243 | Researching a Property in the CSS Specifications | I frequently joke that I’m “reading the specs so you don’t have to”, as I unpack some detail of a CSS spec in a post on my blog, some documentation for MDN, or an article on Smashing Magazine. However waiting for someone like me to write an article about something is a pretty slow way to get the information you need. Sometimes people like me get things wrong, or specifications change after we write a tutorial. What if you could just look it up yourself? That’s what you get when you learn to read the CSS specifications, and in this article my aim is to give you the basic details you need to grab quick information about any CSS property detailed in the CSS specs. Where are the CSS Specifications? The easiest way to see all of the CSS specs is to take a look at the Current Work page in the CSS section of the W3C Website. Here you can see all of the specifications listed, the level they are at and their status. There is also a link to the specification from this page. I explained CSS Levels in my article Why there is no CSS 4. Who are the specifications for? CSS specifications are for everyone who uses CSS. You might be a browser engineer - referred to as an implementor - needing to know how to implement a feature, or a web developer - referred to as an author - wanting to know how to use the feature. The fact that both parties are looking at the same document hopefully means that what the browser displays is what the web developer expected. Which version of a spec should I look at? There are a couple of places you might want to look. Each published spec will have the latest published version, which will have TR in the URL and can be accessed without a date (which is always the newest version) or at a date, which will be the date of that publication. If I’m referring to a particular Working Draft in an article I’ll typically link to the dated version. That way if the information changes it is possible for someone to see where I got the information from at the time of writing. If you want the very latest additions an… | 2018 | Rachel Andrew | rachelandrew | 2018-12-14T00:00:00+00:00 | https://24ways.org/2018/researching-a-property-in-the-css-specifications/ | code |
| 306 | 306 | What next for CSS Grid Layout? | In 2012 I wrote an article for 24 ways detailing a new CSS Specification that had caught my eye, at the time with an implementation only in Internet Explorer. What I didn’t realise at the time was that CSS Grid Layout was to become a theme on which I would base the next four years of research, experimentation, writing and speaking. As I write this article in December 2016, we are looking forward to CSS Grid Layout being shipped in Chrome and Firefox. What will ship early next year in those browsers is expanded and improved from the early implementation I explored in 2012. Over the last four years the spec has been developed as part of the CSS Working Group process, and has had input from browser engineers, specification writers and web developers. Use cases have been discussed, and features added. The CSS Grid Layout specification is now a Candidate Recommendation. This status means the spec is to all intents and purposes, finished. The discussions now happening are on fine implementation details, and not new feature ideas. It makes sense to draw a line under a specification in order that browser vendors can ship complete, interoperable implementations. That approach is good for all of us, it makes development far easier if we know that a browser supports all of the features of a specification, rather than working out which bits are supported. However it doesn’t mean that works stops here, and that new use cases and features can’t be proposed for future levels of Grid Layout. Therefore, in this article I’m going to take a look at some of the things I think grid layout could do in the future. I would love for these thoughts to prompt you to think about how Grid - or any CSS specification - could better suit the use cases you have. Subgrid - the missing feature of Level 1 The implementation of CSS Grid Layout in Chrome, Firefox and Webkit is comparable and very feature complete. There is however one standout feature that has not been implemented in any browser as yet - subgrid. Once you set the value of the displa… | 2016 | Rachel Andrew | rachelandrew | 2016-12-12T00:00:00+00:00 | https://24ways.org/2016/what-next-for-css-grid-layout/ | code |
| 332 | 332 | CSS Layout Starting Points | I build a lot of CSS layouts, some incredibly simple, others that cause sleepless nights and remind me of the torturous puzzle books that were given to me at Christmas by aunties concerned for my education. However, most of the time these layouts fit quite comfortably into one of a very few standard formats. For example: Liquid, multiple column with no footer Liquid, multiple column with footer Fixed width, centred Rather than starting out with blank CSS and (X)HTML documents every time you need to build a layout, you can fairly quickly create a bunch of layout starting points, that will give you a solid basis for creating the rest of the design and mean that you don’t have to remember how a three column layout with a footer is best achieved every time you come across one! These starting points can be really basic, in fact that’s exactly what you want as the final design, the fonts, the colours and so on will be different every time. It’s just the main sections we want to be able to quickly get into place. For example, here is a basic starting point CSS and XHTML document for a fixed width, centred layout with a footer. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Fixed Width and Centred starting point document</title> <link rel="stylesheet" type="text/css" href="fixed-width-centred.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body> <div id="wrapper"> <div id="side"> <div class="inner"> <p>Sidebar content here</p> </div> </div> <div id="content"> <div class="inner"> <p>Your main content goes here.</p> </div> </div> <div id="footer"> <div class="inner"> <p>Ho Ho Ho!</p> </div> </div> </div> </body> </html> body { text-align: center; min-width: 740px; padding: 0; margi… | 2005 | Rachel Andrew | rachelandrew | 2005-12-04T00:00:00+00:00 | https://24ways.org/2005/css-layout-starting-points/ | code |
| 86 | 86 | Flashless Animation | Animation in a Flashless world When I splashed down in web design four years ago, the first thing I wanted to do was animate a cartoon in the browser. I’d been drawing comics for years, and I’ve wanted to see them come to life for nearly as long. Flash animation was still riding high, but I didn’t want to learn Flash. I wanted to learn JavaScript! Sadly, animating with JavaScript was limiting and resource-intensive. My initial foray into an infinitely looping background did more to burn a hole in my CPU than amaze my friends (although it still looks pretty cool). And there was still no simple way to incorporate audio. The browser technology just wasn’t there. Things are different now. CSS3 transitions and animations can do most of the heavy lifting and HTML5 audio can serve up the music and audio clips. You can do a lot without leaning on JavaScript at all, and when you lean on JavaScript, you can do so much more! In this project, I’m going to show you how to animate a simple walk cycle with looping audio. I hope this will inspire you to do something really cool and impress your friends. I’d love to see what you come up with, so please send your creations my way at rachelnabors.com! Note: Because every browser wants to use its own prefixes with CSS3 animations, and I have neither the time nor the space to write all of them out, I will use the W3C standard syntaxes; that is, going prefix-less. You can implement them out of the box with something like Prefixfree, or you can add prefixes on your own. If you take the latter route, I recommend using Sass and Compass so you can focus on your animations, not copying and pasting. The walk cycle Walk cycles are the “Hello world” of animation. One of the first projects of animation students is to spend hours drawing dozens of frames to complete a simple loopable animation of a character walking. Most animators don’t have to draw every frame themselves, though. They draw a few key frames and send those on to production animators to work on the between frames (or twe… | 2012 | Rachel Nabors | rachelnabors | 2012-12-06T00:00:00+00:00 | https://24ways.org/2012/flashless-animation/ | code |
| 55 | 55 | How Tabs Should Work | Tabs in browsers (not browser tabs) are one of the oldest custom UI elements in a browser that I can think of. They’ve been done to death. But, sadly, most of the time I come across them, the tabs have been badly, or rather partially, implemented. So this post is my definition of how a tabbing system should work, and one approach of implementing that. But… tabs are easy, right? I’ve been writing code for tabbing systems in JavaScript for coming up on a decade, and at one point I was pretty proud of how small I could make the JavaScript for the tabbing system: var tabs = $('.tab').click(function () { tabs.hide().filter(this.hash).show(); }).map(function () { return $(this.hash)[0]; }); $('.tab:first').click(); Simple, right? Nearly fits in a tweet (ignoring the whole jQuery library…). Still, it’s riddled with problems that make it a far from perfect solution. Requirements: what makes the perfect tab? All content is navigable and available without JavaScript (crawler-compatible and low JS-compatible). ARIA roles. The tabs are anchor links that: are clickable have block layout have their href pointing to the id of the panel element use the correct cursor (i.e. cursor: pointer). Since tabs are clickable, the user can open in a new tab/window and the page correctly loads with the correct tab open. Right-clicking (and Shift-clicking) doesn’t cause the tab to be selected. Native browser Back/Forward button correctly changes the state of the selected tab (think about it working exactly as if there were no JavaScript in place). The first three points are all to do with the semantics of the markup and how the markup has been styled. I think it’s easy to do a good job by thinking of tabs as links, and not as some part of an application. Links are navigable, and they should work the same way other links on the page work. The last three points are JavaScript problems. Let’s investigate that. The shitmus test Like a litmus test, here’s a couple of quick ways you can tell if a tabbing system is poorly implemented: Cha… | 2015 | Remy Sharp | remysharp | 2015-12-22T00:00:00+00:00 | https://24ways.org/2015/how-tabs-should-work/ | code |
| 182 | 182 | Breaking Out The Edges of The Browser | HTML5 contains more than just the new entities for a more meaningful document, it also contains an arsenal of JavaScript APIs. So many in fact, that some APIs have outgrown the HTML5 spec’s backyard and have been sent away to grow up all on their own and been given the prestigious honour of being specs in their own right. So when I refer to (bendy finger quote) “HTML5”, I mean the HTML5 specification and a handful of other specifications that help us authors build web applications. Examples of those specs I would include in the umbrella term would be: geolocation, web storage, web databases, web sockets and web workers, to name a few. For all you guys and gals, on this special 2009 series of 24 ways, I’m just going to focus on data storage and offline applications: boldly taking your browser where no browser has gone before! Web Storage The Web Storage API is basically cookies on steroids, a unhealthy dosage of steroids. Cookies are always a pain to work with. First of all you have the problem of setting, changing and deleting them. Typically solved by Googling and blindly relying on PPK’s solution. If that wasn’t enough, there’s the 4Kb limit that some of you have hit when you really don’t want to. The Web Storage API gets around all of the hoops you have to jump through with cookies. Storage supports around 5Mb of data per domain (the spec’s recommendation, but it’s open to the browsers to implement anything they like) and splits in to two types of storage objects: sessionStorage – available to all pages on that domain while the window remains open localStorage – available on the domain until manually removed Support Ignoring beta browsers for our support list, below is a list of the major browsers and their support for the Web Storage API: Latest: Internet Explorer, Firefox, Safari (desktop & mobile/iPhone) Partial: Google Chrome (only supports localStorage) Not supported: Opera (as of 10.10) Usage Both sessionStorage and localStorage support the same interface for accessing their co… | 2009 | Remy Sharp | remysharp | 2009-12-02T00:00:00+00:00 | https://24ways.org/2009/breaking-out-the-edges-of-the-browser/ | code |
| 239 | 239 | Using the WebFont Loader to Make Browsers Behave the Same | Web fonts give us designers a whole new typographic palette with which to work. However, browsers handle the loading of web fonts in different ways, and this can lead to inconsistent user experiences. Safari, Chrome and Internet Explorer leave a blank space in place of the styled text while the web font is loading. Opera and Firefox show text with the default font which switches over when the web font has loaded, resulting in the so-called Flash of Unstyled Text (aka FOUT). Some people prefer Safari’s approach as it eliminates FOUT, others think the Firefox way is more appropriate as content can be read whilst fonts download. Whatever your preference, the WebFont Loader can make all browsers behave the same way. The WebFont Loader is a JavaScript library that gives you extra control over font loading. It was co-developed by Google and Typekit, and released as open source. The WebFont Loader works with most web font services as well as with self-hosted fonts. The WebFont Loader tells you when the following events happen as a browser downloads web fonts (or loads them from cache): when fonts start to download (‘loading’) when fonts finish loading (‘active’) if fonts fail to load (‘inactive’) If your web page requires more than one font, the WebFont Loader will trigger events for individual fonts, and for all the fonts as a whole. This means you can find out when any single font has loaded, and when all the fonts have loaded (or failed to do so). The WebFont Loader notifies you of these events in two ways: by applying special CSS classes when each event happens; and by firing JavaScript events. For our purposes, we’ll be using just the CSS classes. Implementing the WebFont Loader As stated above, the WebFont Loader works with most web font services as well as with self-hosted fonts. Self-hosted fonts To use the WebFont Loader when you are hosting the font files on your own server, paste the following code into your web page: <script type="text/javascript"> WebFontConfig = { custom: { families: ['Fon… | 2010 | Richard Rutter | richardrutter | 2010-12-02T00:00:00+00:00 | https://24ways.org/2010/using-the-webfont-loader-to-make-browsers-behave-the-same/ | code |
| 307 | 307 | Get the Balance Right: Responsive Display Text | Last year in 24 ways I urged you to Get Expressive with Your Typography. I made the case for grabbing your readers’ attention by setting text at display sizes, that is to say big. You should consider very large text in the same way you might a hero image: a picture that creates an atmosphere and anchors your layout. When setting text to be read, it is best practice to choose body and subheading sizes from a pre-defined scale appropriate to the viewport dimensions. We set those sizes using rems, locking the text sizes together so they all scale according to the page default and your reader’s preferences. You can take the same approach with display text by choosing larger sizes from the same scale. However, display text, as defined by its purpose and relative size, is text to be seen first, and read second. In other words a picture of text. When it comes to pictures, you are likely to scale all scene-setting imagery - cover photos, hero images, and so on - relative to the viewport. Take the same approach with display text: lock the size and shape of the text to the screen or browser window. Introducing viewport units With CSS3 came a new set of units which are locked to the viewport. You can use these viewport units wherever you might otherwise use any other unit of length such as pixels, ems or percentage. There are four viewport units, and in each case a value of 1 is equal to 1% of either the viewport width or height as reported in reference1 pixels: vw - viewport width, vh - viewport height, vmin - viewport height or width, whichever is smaller vmax - viewport height or width, whichever is larger In one fell swoop you can set the size of a display heading to be proportional to the screen or browser width, rather than choosing from a scale in a series of media queries. The following makes the heading font size 13% of the viewport width: h1 { font-size: 13 vw; } So for a selection of widths, the rendered font size would be: Rendered font size (px) Viewport width 13 vw 320 42 768 100 1024 133 1280 166 1920 … | 2016 | Richard Rutter | richardrutter | 2016-12-09T00:00:00+00:00 | https://24ways.org/2016/responsive-display-text/ | code |
| 334 | 334 | Transitional vs. Strict Markup | When promoting web standards, standardistas often talk about XHTML as being more strict than HTML. In a sense it is, since it requires that all elements are properly closed and that attribute values are quoted. But there are two flavours of XHTML 1.0 (three if you count the Frameset DOCTYPE, which is outside the scope of this article), defined by the Transitional and Strict DOCTYPEs. And HTML 4.01 also comes in those flavours. The names reveal what they are about: Transitional DOCTYPEs are meant for those making the transition from older markup to modern ways. Strict DOCTYPEs are actually the default – the way HTML 4.01 and XHTML 1.0 were constructed to be used. A Transitional DOCTYPE may be used when you have a lot of legacy markup that cannot easily be converted to comply with a Strict DOCTYPE. But Strict is what you should be aiming for. It encourages, and in some cases enforces, the separation of structure and presentation, moving the presentational aspects from markup to CSS. From the HTML 4 Document Type Definition: This is HTML 4.01 Strict DTD, which excludes the presentation attributes and elements that W3C expects to phase out as support for style sheets matures. Authors should use the Strict DTD when possible, but may use the Transitional DTD when support for presentation attribute and elements is required. An additional benefit of using a Strict DOCTYPE is that doing so will ensure that browsers use their strictest, most standards compliant rendering modes. Tommy Olsson provides a good summary of the benefits of using Strict over Transitional in Ten questions for Tommy Olsson at Web Standards Group: In my opinion, using a Strict DTD, either HTML 4.01 Strict or XHTML 1.0 Strict, is far more important for the quality of the future web than whether or not there is an X in front of the name. The Strict DTD promotes a separation of structure and presentation, which makes a site so much easier to maintain. For those looking to start using web standards and valid, semantic markup, it is important… | 2005 | Roger Johansson | rogerjohansson | 2005-12-13T00:00:00+00:00 | https://24ways.org/2005/transitional-vs-strict-markup/ | code |
| 63 | 63 | Be Fluid with Your Design Skills: Build Your Own Sites | Just five years ago in 2010, when we were all busy trying to surprise and delight, learning CSS3 and trying to get whole websites onto one page, we had a poster on our studio wall. It was entitled ‘Designers Vs Developers’, an infographic that showed us the differences between the men(!) who created websites. Designers wore skinny jeans and used Macs and developers wore cargo pants and brought their own keyboards to work. We began to learn that designers and developers were not only doing completely different jobs but were completely different people in every way. This opinion was backed up by hundreds of memes, millions of tweets and pages of articles which used words like void and battle and versus. Thankfully, things move quickly in this industry; the wide world of web design has moved on in the last five years. There are new devices, technologies, tools – and even a few women. Designers have been helped along by great apps, software, open source projects, conferences, and a community of people who, to my unending pride, love to share their knowledge and their work. So the world has moved on, and if Miley Cyrus, Ruby Rose and Eliot Sumner are identifying as gender fluid (an identity which refers to a gender which varies over time or is a combination of identities), then I would like to come out as discipline fluid! OK, I will probably never identify as a developer, but I will identify as fluid! How can we be anything else in an industry that moves so quickly? That’s how we should think of our skills, our interests and even our job titles. After all, Steve Jobs told us that “Design is not just what it looks like and feels like. Design is how it works.” Sorry skinny-jean-wearing designers – this means we’re all designing something together. And it’s not just about knowing the right words to use: you have to know how it feels. How it feels when you make something work, when you fix that bug, when you make it work on IE. Like anything in life, things run smoothly when you make the effort to share experiences, em… | 2015 | Ros Horner | roshorner | 2015-12-12T00:00:00+00:00 | https://24ways.org/2015/be-fluid-with-your-design-skills-build-your-own-sites/ | code |
| 20 | 20 | Make Your Browser Dance | It was a crisp winter’s evening when I pulled up alongside the pier. I stepped out of my car and the bitterly cold sea air hit my face. I walked around to the boot, opened it and heaved out a heavy flight case. I slammed the boot shut, locked the car and started walking towards the venue. This was it. My first gig. I thought about all those weeks of preparation: editing video clips, creating 3-D objects, making coloured patterns, then importing them all into software and configuring effects to change as the music did; targeting frequency, beat, velocity, modifying size, colour, starting point; creating playlists of these… and working out ways to mix them as the music played. This was it. This was me VJing. This was all a lifetime (well a decade!) ago. When I started web designing, VJing took a back seat. I was more interested in interactive layouts, semantic accessible HTML, learning all the IE bugs and mastering the quirks that CSS has to offer. More recently, I have been excited by background gradients, 3-D transforms, the @keyframe directive, as well as new APIs such as getUserMedia, indexedDB, the Web Audio API But wait, have I just come full circle? Could it be possible, with these wonderful new things in technologies I am already familiar with, that I could VJ again, right here, in a browser? Well, there’s only one thing to do: let’s try it! Let’s take to the dance floor Over the past couple of years working in The Lab I have learned to take a much more iterative approach to projects than before. One of my new favourite methods of working is to create a proof of concept to make sure my theory is feasible, before going on to create a full-blown product. So let’s take the same approach here. The main VJing functionality I want to recreate is manipulating visuals in relation to sound. So for my POC I need to create a visual, with parameters that can be changed, then get some sound and see if I can analyse that sound to detect some data, which I can then use to manipulate the visual parameters. Easy, … | 2013 | Ruth John | ruthjohn | 2013-12-02T00:00:00+00:00 | https://24ways.org/2013/make-your-browser-dance/ | 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 |
| 30 | 30 | Making Sites More Responsive, Responsibly | With digital projects we’re used to shifting our thinking to align with our target audience. We may undertake research, create personas, identify key tasks, or observe usage patterns, with our findings helping to refine our ongoing creations. A product’s overall experience can make or break its success, and when it comes to defining these experiences our development choices play a huge role alongside more traditional user-focused activities. The popularisation of responsive web design is a great example of how we are able to shape the web’s direction through using technology to provide better experiences. If we think back to the move from table-based layouts to CSS, initially our clients often didn’t know or care about the difference in these approaches, but we did. Responsive design was similar in this respect – momentum grew through the web industry choosing to use an approach that we felt would give a better experience, and which was more future-friendly. We tend to think of responsive design as a means of displaying content appropriately across a range of devices, but the technology and our implementation of it can facilitate much more. A responsive layout not only helps your content work when the newest smartphone comes out, but it also ensures your layout suitably adapts if a visually impaired user drastically changes the size of the text. The 24 ways site at 400% on a Retina MacBook Pro displays a layout more typically used for small screens. When we think more broadly, we realise that our technical choices and approaches to implementation can have knock-on effects for the greater good, and beyond our initial target audiences. We can make our experiences more responsive to people’s needs, enhancing their usability and accessibility along the way. Being responsibly responsive Of course, when we think about being more responsive, there’s a fine line between creating useful functionality and becoming intrusive and overly complex. In the excellent Responsible Responsive Design, Scott Jehl states that: … | 2014 | Sally Jenkinson | sallyjenkinson | 2014-12-10T00:00:00+00:00 | https://24ways.org/2014/making-sites-more-responsive-responsibly/ | code |
| 42 | 42 | An Overview of SVG Sprite Creation Techniques | SVG can be used as an icon system to replace icon fonts. The reasons why SVG makes for a superior icon system are numerous, but we won’t be going over them in this article. If you don’t use SVG icons and are interested in knowing why you may want to use them, I recommend you check out “Inline SVG vs Icon Fonts” by Chris Coyier – it covers the most important aspects of both systems and compares them with each other to help you make a better decision about which system to choose. Once you’ve made the decision to use SVG instead of icon fonts, you’ll need to think of the best way to optimise the delivery of your icons, and ways to make the creation and use of icons faster. Just like bitmaps, we can create image sprites with SVG – they don’t look or work exactly alike, but the basic concept is pretty much the same. There are several ways to create SVG sprites, and this article will give you an overview of three of them. While we’re at it, we’re going to take a look at some of the available tools used to automate sprite creation and fallback for us. Prerequisites The content of this article assumes you are familiar with SVG. If you’ve never worked with SVG before, you may want to look at some of the introductory tutorials covering SVG syntax, structure and embedding techniques. I recommend the following: SVG basics: Using SVG. Structure: Structuring, Grouping, and Referencing in SVG — The <g>, <use>, <defs> and <symbol> Elements. We’ll mention <use> and <symbol> quite a bit in this article. Embedding techniques: Styling and Animating SVGs with CSS. The article covers several topics, but the section linked focuses on embedding techniques. A compendium of SVG resources compiled by Chris Coyier — contains resources to almost every aspect of SVG you might be interested in. And if you’re completely new to the concept of spriting, Chris Coyier’s CSS Sprites explains all about them. Another important SVG feature is the viewBox attribute. For some of the techniques, knowing your way around this attribute is … | 2014 | Sara Soueidan | sarasoueidan | 2014-12-16T00:00:00+00:00 | https://24ways.org/2014/an-overview-of-svg-sprite-creation-techniques/ | code |
| 296 | 296 | Animation in Design Systems | Our modern front-end workflow has matured over time to include design systems and component libraries that help us stay organized, improve workflows, and simplify maintenance. These systems, when executed well, ensure proper documentation of the code available and enable our systems to scale with reduced communication conflicts. But while most of these systems take a critical stance on fonts, colors, and general building blocks, their treatment of animation remains disorganized and ad-hoc. Let’s leverage existing structures and workflows to reduce friction when it comes to animation and create cohesive and performant user experiences. Understand the importance of animation Part of the reason we treat animation like a second-class citizen is that we don’t really consider its power. When users are scanning a website (or any environment or photo), they are attempting to build a spatial map of their surroundings. During this process, nothing quite commands attention like something in motion. We are biologically trained to notice motion: evolutionarily speaking, our survival depends on it. For this reason, animation when done well can guide your users. It can aid and reinforce these maps, and give us a sense that we understand the UX more deeply. We retrieve information and put it back where it came from instead of something popping in and out of place. “Where did that menu go? Oh it’s in there.” For a deeper dive into how animation can connect disparate states, I wrote about the Importance of Context-Shifting in UX Patterns for CSS-Tricks. An animation flow on mobile. Animation also aids in perceived performance. Viget conducted a study where they measured user engagement with a standard loading GIF versus a custom animation. Customers were willing to wait almost twice as long for the custom loader, even though it wasn’t anything very fancy or crazy. Just by showing their users that they cared about them, they stuck around, and the bounce rates dropped. 14 second generic loading screen.22 second custom loadin… | 2016 | Sarah Drasner | sarahdrasner | 2016-12-16T00:00:00+00:00 | https://24ways.org/2016/animation-in-design-systems/ | code |
| 231 | 231 | Designing for iOS: Life Beyond Media Queries | Although not a new phenomenon, media queries seem to be getting a lot attention online recently and for the right reasons too – it’s great to be able to adapt a design with just a few lines of CSS – but many people are relying only on them to create an iPhone-specific version of their website. I was pleased to hear at FOWD NYC a few weeks ago that both myself and Aral Balkan share the same views on why media queries aren’t always going to be the best solution for mobile. Both of us specialise in iPhone design ourselves and we opt for a different approach to media queries. The trouble is, regardless of what you have carefully selected to be display:none; in your CSS, the iPhone still loads everything in the background; all that large imagery for your full scale website also takes up valuable mobile bandwidth and time. You can greatly increase the speed of your website by creating a specific site tailored to mobile users with just a few handy pointers – media queries, in some instances, might be perfectly suitable but, in others, here’s what you can do. Redirect your iPhone/iPod Touch users To detect whether someone is viewing your site on an iPhone or iPod Touch, you can either use JavaScript or PHP. The JavaScript if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))) { if (document.cookie.indexOf("iphone_redirect=false") == -1) window.location = "http://mobile.yoursitehere.com"; } The PHP if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') || strstr($_SERVER['HTTP_USER_AGENT'],'iPod')) { header('Location: http://mobile.yoursitehere.com'); exit(); } Both of these methods redirect the user to a site that you have made specifically for the iPhone. At this point, be sure to provide a link to the full version of the website, in case the user wishes to view this and not be thrown into an experience they didn’t want, with no way back. Tailoring your site So, now you’ve got 320 × 480 pixels of screen to play with – and to create a style sheet for, just as you would fo… | 2010 | Sarah Parmenter | sarahparmenter | 2010-12-17T00:00:00+00:00 | https://24ways.org/2010/life-beyond-media-queries/ | code |
| 276 | 276 | Your jQuery: Now With 67% Less Suck | Fun fact: more websites are now using jQuery than Flash. jQuery is an amazing tool that’s made JavaScript accessible to developers and designers of all levels of experience. However, as Spiderman taught us, “with great power comes great responsibility.” The unfortunate downside to jQuery is that while it makes it easy to write JavaScript, it makes it easy to write really really f*&#ing bad JavaScript. Scripts that slow down page load, unresponsive user interfaces, and spaghetti code knotted so deep that it should come with a bottle of whiskey for the next sucker developer that has to work on it. This becomes more important for those of us who have yet to move into the magical fairy wonderland where none of our clients or users view our pages in Internet Explorer. The IE JavaScript engine moves at the speed of an advancing glacier compared to more modern browsers, so optimizing our code for performance takes on an even higher level of urgency. Thankfully, there are a few very simple things anyone can add into their jQuery workflow that can clear up a lot of basic problems. When undertaking code reviews, three of the areas where I consistently see the biggest problems are: inefficient selectors; poor event delegation; and clunky DOM manipulation. We’ll tackle all three of these and hopefully you’ll walk away with some new jQuery batarangs to toss around in your next project. Selector optimization Selector speed: fast or slow? Saying that the power behind jQuery comes from its ability to select DOM elements and act on them is like saying that Photoshop is a really good tool for selecting pixels on screen and making them change color – it’s a bit of a gross oversimplification, but the fact remains that jQuery gives us a ton of ways to choose which element or elements in a page we want to work with. However, a surprising number of web developers are unaware that all selectors are not created equal; in fact, it’s incredible just how drastic the performance difference can be between two selectors that, at first g… | 2011 | Scott Kosman | scottkosman | 2011-12-13T00:00:00+00:00 | https://24ways.org/2011/your-jquery-now-with-less-suck/ | code |
| 255 | 255 | Inclusive Considerations When Restyling Form Controls | I would like to begin by saying 2018 was the year that we, as developers, visual designers, browser implementers, and inclusive design and experience specialists rallied together and achieved a long-sought goal: We now have the ability to fully style form controls, across all modern browsers, while retaining their ease of declaration, native functionality and accessibility. I would like to begin by saying all these things. However, they’re not true. I think we spent the year debating about what file extension CSS should be written in, or something. Or was that last year? Maybe I’m thinking of next year. Returning to reality, styling form controls is more tricky and time consuming these days rather than flat out “hard”. In fact, depending on the length of the styling-leash a particular browser provides, there are controls you can style quite a bit. As for browsers with shorter leashes, there are other options to force their controls closer to the visual design you’re tasked to match. However, when striving for custom styled controls, one must be careful not to forget about the inherent functionality and accessibility that many provide. People expect and deserve the products and services they use and pay for to work for them. If these services are visually pleasing, but only function for those who fit the handful of personas they’ve been designed for, then we’ve potentially deprived many people the experiences they deserve. Quick level setting Getting down to brass tacks, when creating custom styled form controls that should retain their expected semantics and functionality, we have to consider the following: Many form elements can be styled directly through standard and browser specific selectors, as well as through some clever styling of markup patterns. We should leverage these native options before reinventing any wheels. It is important to preserve the underlying semantics of interactive controls. We must not unintentionally exclude people who use assistive technologies (ATs) that rely on these semantics. Ma… | 2018 | Scott O'Hara | scottohara | 2018-12-13T00:00:00+00:00 | https://24ways.org/2018/inclusive-considerations-when-restyling-form-controls/ | code |
| 221 | 221 | “Probably, Maybe, No”: The State of HTML5 Audio | With the hype around HTML5 and CSS3 exceeding levels not seen since 2005’s Ajax era, it’s worth noting that the excitement comes with good reason: the two specifications render many years of feature hacks redundant by replacing them with native features. For fun, consider how many CSS2-based rounded corners hacks you’ve probably glossed over, looking for a magic solution. These days, with CSS3, the magic is border-radius (and perhaps some vendor prefixes) followed by a coffee break. CSS3’s border-radius, box-shadow, text-shadow and gradients, and HTML5’s <canvas>, <audio> and <video> are some of the most anticipated features we’ll see put to creative (ab)use as adoption of the ‘new shiny’ grows. Developers jumping on the cutting edge are using subsets of these features to little detriment, in most cases. The more popular CSS features are design flourishes that can degrade nicely, but the current audio and video implementations in particular suffer from a number of annoyances. The new shiny: how we got here Sound involves one of the five senses, a key part of daily life for most – and yet it has been strangely absent from HTML and much of the web by default. From a simplistic perspective, it seems odd that HTML did not include support for the full multimedia experience earlier, despite the CD-ROM-based craze of the early 1990s. In truth, standards like HTML can take much longer to bake, but eventually deliver the promise of a lowered barrier to entry, consistent implementations and shiny new features now possible ‘for free’ just about everywhere. <img> was introduced early and naturally to HTML, despite having some opponents at the time. Perhaps <audio> and <video> were avoided, given the added technical complexity of decoding various multi-frame formats, plus the hardware and bandwidth limitations of the era. Perhaps there were quarrels about choosing a standard format or – more simply – maybe these elements just weren’t considered to be applicable to the HTML-based web at the time. In any event, browser plug… | 2010 | Scott Schiller | scottschiller | 2010-12-08T00:00:00+00:00 | https://24ways.org/2010/the-state-of-html5-audio/ | code |
| 295 | 295 | Internet of Stranger Things | This year I’ve been running a workshop about using JavaScript and Node.js to work with all different kinds of electronics on the Raspberry Pi. So especially for 24 ways I’m going to show you how I made a very special Raspberry Pi based internet connected project! And nothing says Christmas quite like a set of fairy lights connected to another dimension1. What you’ll see You can rig up the fairy lights in your home, with the scrawly letters written under each one. The people from the other side (i.e. the internet) will be able to write messages to you from their browser in real time. In fact why not try it now; check this web page. When you click the lights in your browser, my lights (and yours) will turn on and off in real life! (There may be a queue if there are lots of people accessing it, hit the “Send a message” button and wait your turn.) It’s all done with JavaScript, using Node.js running on both the Raspberry Pi and on the server. I’m using WebSockets to communicate in real time between the browser, server and Raspberry Pi. What you’ll need Raspberry Pi any of the following models: Zero (will need straight male header pins soldered2 and Micro USB OTG adaptor), A+, B+, 2, or 3 Micro SD card at least 4Gb Class 10 speed3 Micro USB power supply at least 2A USB Wifi dongle (unless you have a Pi 3 - that has wifi built in). Addressable fairy lights Logic level shifter (with pins soldered unless you want to do it!) Breadboard Jumper wires (3x male to male and 4x female to male) Optional but recommended Base board to hold the Pi and Breadboard (often comes with a breadboard!) Find links for where to buy all of these items that goes along with this tutorial. The total price should be around $1004. Setting up the Raspberry Pi You’ll need to install the SD card for the Raspberry Pi. You’ll find a link to download a disk image on the support document, ready-made with the Raspbian version of Linux, along with Node.js and all the files you need. Download it and write it to the SD card using the fantastic free … | 2016 | Seb Lee-Delisle | sebleedelisle | 2016-12-01T00:00:00+00:00 | https://24ways.org/2016/internet-of-stranger-things/ | code |
| 211 | 211 | Automating Your Accessibility Tests | Accessibility is one of those things we all wish we were better at. It can lead to a bunch of questions like: how do we make our site better? How do we test what we have done? Should we spend time each day going through our site to check everything by hand? Or just hope that everyone on our team has remembered to check their changes are accessible? This is where automated accessibility tests can come in. We can set up automated tests and have them run whenever someone makes a pull request, and even alongside end-to-end tests, too. Automated tests can’t cover everything however; only 20 to 50% of accessibility issues can be detected automatically. For example, we can’t yet automate the comparison of an alt attribute with an image’s content, and there are some screen reader tests that need to be carried out by hand too. To ensure our site is as accessible as possible, we will still need to carry out manual tests, and I will cover these later. First, I’m going to explain how I implemented automated accessibility tests on Elsevier’s ecommerce pages, and share some of the lessons I learnt along the way. Picking the right tool One of the hardest, but most important parts of creating our automated accessibility tests was choosing the right tool. We began by investigating aXe CLI, but soon realised it wouldn’t fit our requirements. It couldn’t check pages that required a visitor to log in, so while we could test our product pages, we couldn’t test any customer account pages. Instead we moved over to Pa11y. Its beforeScript step meant we could log into the site and test pages such as the order history. The example below shows the how the beforeScript step completes a login form and then waits for the login to complete before testing the page: beforeScript: function(page, options, next) { // An example function that can be used to make sure changes have been confirmed before continuing to run Pa11y function waitUntil(condition, retries, waitOver) { page.evaluate(condition, function(err, result) { if (result … | 2017 | Seren Davies | serendavies | 2017-12-07T00:00:00+00:00 | https://24ways.org/2017/automating-your-accessibility-tests/ | code |
| 298 | 298 | First Steps in VR | The web is all around us. As web folk, it is our responsibility to consider the impact our work can have. Part of this includes thinking about the future; the web changes lives and if we are building the web then we are the ones making decisions that affect people in every corner of the world. I find myself often torn between wanting to make the right decisions, and just wanting to have fun. To fiddle and play. We all know how important it is to sometimes just try ideas, whether they will amount to much or not. I think of these two mindsets as production and prototyping, though of course there are lots of overlap and phases in between. I mention this because virtual reality is currently seen as a toy for rich people, and in some ways at the moment it is. But with WebVR we are able to create interesting experiences with a relatively low entry point. I want us to have open minds, play around with things, and then see how we can use the tools we have at our disposal to make things that will help people. Every year we see articles saying it will be the “year of virtual reality”, that was especially prevalent this year. 2016 has been a year of progress, VR isn’t quite mainstream but with efforts like Playstation VR and Google Cardboard, we are definitely seeing much more of it. This year also saw the consumer editions of the Oculus Rift and HTC Vive. So it does seem to be a good time for an overview of how to get involved with creating virtual reality on the web. WebVR is an API for connecting to devices and retrieving continuous data such as the position and orientation. Unlike the Web Audio API and some other APIs, WebVR does not feel like a framework. You use it however you want, taking the data and using it as you wish. To make it easier, there are plenty of resources such as Three.js, A-Frame and ReactVR that help to make the heavy lifting a bit easier. Getting Started with A-Frame I like taking the opportunity to learn new things whenever I can. So while planning this article I thought that instead of trying to… | 2016 | Shane Hudson | shanehudson | 2016-12-11T00:00:00+00:00 | https://24ways.org/2016/first-steps-in-vr/ | code |
| 129 | 129 | Knockout Type - Thin Is Always In | OS X has gorgeous native anti-aliasing (although I will admit to missing 10px aliased Geneva — *sigh*). This is especially true for dark text on a light background. However, things can go awry when you start using light text on a dark background. Strokes thicken. Counters constrict. Letterforms fill out like seasonal snackers. So how do we combat the fat? In Safari and other Webkit-based browsers we can use the CSS ‘text-shadow’ property. While trying to add a touch more contrast to the navigation on haveamint.com I noticed an interesting side-effect on the weight of the type. The second line in the example image above has the following style applied to it: This creates an invisible drop-shadow. (Why is it invisible? The shadow is positioned directly behind the type (the first two zeros) and has no spread (the third zero). So the color, black, is completely eclipsed by the type it is supposed to be shadowing.) Why applying an invisible drop-shadow effectively lightens the weight of the type is unclear. What is clear is that our light-on-dark text is now of a comparable weight to its dark-on-light counterpart. You can see this trick in effect all over ShaunInman.com and in the navigation on haveamint.com and Subtraction.com. The HTML and CSS source code used to create the example images used in this article can be found here. | 2006 | Shaun Inman | shauninman | 2006-12-17T00:00:00+00:00 | https://24ways.org/2006/knockout-type/ | code |
| 316 | 316 | Have Your DOM and Script It Too | When working with the XMLHttpRequest object it appears you can only go one of three ways: You can stay true to the colorful moniker du jour and stick strictly to the responseXML property You can play with proprietary – yet widely supported – fire and inject the value of responseText property into the innerHTML of an element of your choosing Or you can be eval() and parse JSON or arbitrary JavaScript delivered via responseText But did you know that there’s a fourth option giving you the best of the latter two worlds? Mint uses this unmentioned approach to grab fresh HTML and run arbitrary JavaScript simultaneously. Without relying on eval(). “But wait-”, you might say, “when would I need to do this?” Besides the example below this technique is handy for things like tab groups that need initialization onload but miss the main onload event handler by a mile thanks to asynchronous scripting. Consider the problem Originally Mint used option 2 to refresh or load new tabs into individual Pepper panes without requiring a full roundtrip to the server. This was all well and good until I introduced the new Client Mode which when enabled allows anyone to view a Mint installation without being logged in. If voyeurs are afoot as Client Mode is disabled, the next time they refresh a pane the entire login page is inserted into the current document. That’s not very helpful so I needed a way to redirect the current document to the login page. Enter the solution Wouldn’t it be cool if browsers interpreted the contents of script tags crammed into innerHTML? Sure, but unfortunately, that just wasn’t meant to be. However like the body element, image elements have an onload event handler. When the image has fully loaded the handler runs the code applied to it. See where I’m going with this? By tacking a tiny image (think single pixel, transparent spacer gif – shudder) onto the end of the HTML returned by our Ajax call, we can smuggle our arbitrary JavaScript into the existing document. The image is added to the DOM, and … | 2005 | Shaun Inman | shauninman | 2005-12-24T00:00:00+00:00 | https://24ways.org/2005/have-your-dom-and-script-it-too/ | code |
| 168 | 168 | Unobtrusively Mapping Microformats with jQuery | Microformats are everywhere. You can’t shake an electronic stick these days without accidentally poking a microformat-enabled site, and many developers use microformats as a matter of course. And why not? After all, why invent your own class names when you can re-use pre-defined ones that give your site extra functionality for free? Nevertheless, while it’s good to know that users of tools such as Tails and Operator will derive added value from your shiny semantics, it’s nice to be able to reuse that effort in your own code. We’re going to build a map of some of my favourite restaurants in Brighton. Fitting with the principles of unobtrusive JavaScript, we’ll start with a semantically marked up list of restaurants, then use JavaScript to add the map, look up the restaurant locations and plot them as markers. We’ll be using a couple of powerful tools. The first is jQuery, a JavaScript library that is ideally suited for unobtrusive scripting. jQuery allows us to manipulate elements on the page based on their CSS selector, which makes it easy to extract information from microformats. The second is Mapstraction, introduced here by Andrew Turner a few days ago. We’ll be using Google Maps in the background, but Mapstraction makes it easy to change to a different provider if we want to later. Getting Started We’ll start off with a simple collection of microformatted restaurant details, representing my seven favourite restaurants in Brighton. The full, unstyled list can be seen in restaurants-plain.html. Each restaurant listing looks like this: <li class="vcard"> <h3><a class="fn org url" href="http://www.riddleandfinns.co.uk/">Riddle & Finns</a></h3> <div class="adr"> <p class="street-address">12b Meeting House Lane</p> <p><span class="locality">Brighton</span>, <abbr class="country-name" title="United Kingdom">UK</abbr></p> <p class="postal-code">BN1 1HB</p> </div> <p>Telephone: <span class="tel">+44 (0)1273 323 008</span></p> <p>E-mail: <a href="mailto:info@riddleandfinns.co.uk" class="email">info@ri… | 2007 | Simon Willison | simonwillison | 2007-12-12T00:00:00+00:00 | https://24ways.org/2007/unobtrusively-mapping-microformats-with-jquery/ | code |
| 249 | 249 | Fast Autocomplete Search for Your Website | Every website deserves a great search engine - but building a search engine can be a lot of work, and hosting it can quickly get expensive. I’m going to build a search engine for 24 ways that’s fast enough to support autocomplete (a.k.a. typeahead) search queries and can be hosted for free. I’ll be using wget, Python, SQLite, Jupyter, sqlite-utils and my open source Datasette tool to build the API backend, and a few dozen lines of modern vanilla JavaScript to build the interface. Try it out here, then read on to see how I built it. First step: crawling the data The first step in building a search engine is to grab a copy of the data that you plan to make searchable. There are plenty of potential ways to do this: you might be able to pull it directly from a database, or extract it using an API. If you don’t have access to the raw data, you can imitate Google and write a crawler to extract the data that you need. I’m going to do exactly that against 24 ways: I’ll build a simple crawler using wget, a command-line tool that features a powerful “recursive” mode that’s ideal for scraping websites. We’ll start at the https://24ways.org/archives/ page, which links to an archived index for every year that 24 ways has been running. Then we’ll tell wget to recursively crawl the website, using the --recursive flag. We don’t want to fetch every single page on the site - we’re only interested in the actual articles. Luckily, 24 ways has nicely designed URLs, so we can tell wget that we only care about pages that start with one of the years it has been running, using the -I argument like this: -I /2005,/2006,/2007,/2008,/2009,/2010,/2011,/2012,/2013,/2014,/2015,/2016,/2017 We want to be polite, so let’s wait for 2 seconds between each request rather than hammering the site as fast as we can: --wait 2 The first time I ran this, I accidentally downloaded the comments pages as well. We don’t want those, so let’s exclude them from the crawl using -X "/*/*/comments". Finally, it’s useful to be able to run the command multiple times… | 2018 | Simon Willison | simonwillison | 2018-12-19T00:00:00+00:00 | https://24ways.org/2018/fast-autocomplete-search-for-your-website/ | code |
| 326 | 326 | Don't be eval() | JavaScript is an interpreted language, and like so many of its peers it includes the all powerful eval() function. eval() takes a string and executes it as if it were regular JavaScript code. It’s incredibly powerful and incredibly easy to abuse in ways that make your code slower and harder to maintain. As a general rule, if you’re using eval() there’s probably something wrong with your design. Common mistakes Here’s the classic misuse of eval(). You have a JavaScript object, foo, and you want to access a property on it – but you don’t know the name of the property until runtime. Here’s how NOT to do it: var property = 'bar'; var value = eval('foo.' + property); Yes it will work, but every time that piece of code runs JavaScript will have to kick back in to interpreter mode, slowing down your app. It’s also dirt ugly. Here’s the right way of doing the above: var property = 'bar'; var value = foo[property]; In JavaScript, square brackets act as an alternative to lookups using a dot. The only difference is that square bracket syntax expects a string. Security issues In any programming language you should be extremely cautious of executing code from an untrusted source. The same is true for JavaScript – you should be extremely cautious of running eval() against any code that may have been tampered with – for example, strings taken from the page query string. Executing untrusted code can leave you vulnerable to cross-site scripting attacks. What’s it good for? Some programmers say that eval() is B.A.D. – Broken As Designed – and should be removed from the language. However, there are some places in which it can dramatically simplify your code. A great example is for use with XMLHttpRequest, a component of the set of tools more popularly known as Ajax. XMLHttpRequest lets you make a call back to the server from JavaScript without refreshing the whole page. A simple way of using this is to have the server return JavaScript code which is then passed to eval(). Here is a simple function for doing exactly that … | 2005 | Simon Willison | simonwillison | 2005-12-07T00:00:00+00:00 | https://24ways.org/2005/dont-be-eval/ | code |
| 201 | 201 | Lint the Web Forward With Sonarwhal | Years ago, when I was in a senior in college, much of my web development courses focused on two things: the basics like HTML and CSS (and boy, do I mean basic), and Adobe Flash. I spent many nights writing ActionScript 3.0 to build interactions for the websites that I would add to my portfolio. A few months after graduating, I built one website in Flash for a client, then never again. Flash was dying, and it became obsolete in my résumé and portfolio. That was my first lesson in the speed at which things change in technology, and what a daunting realization that was as a new graduate looking to enter the professional world. Now, seven years later, I work on the Microsoft Edge team where I help design and build a tool that would have lessened my early career anxieties: sonarwhal. Sonarwhal is a linting tool, built by and for the web community. The code is open source and lives under the JS Foundation. It helps web developers and designers like me keep up with the constant change in technology while simultaneously teaching how to code better websites. Introducing sonarwhal’s mascot Nellie Good web development is hard. It is more than HTML, CSS, and JavaScript: developers are expected to have a grasp of accessibility, performance, security, emerging standards, and more, all while refreshing this knowledge every few months as the web evolves. It’s a lot to keep track of. Web development is hard Staying up-to-date on all this knowledge is one of the driving forces for developing this scanning tool. Whether you are just starting out, are a student, or you have over a decade of experience, the sonarwhal team wants to help you build better websites for all browsers. Currently sonarwhal checks for best practices in five categories: Accessibility, Interoperability, Performance, PWAs, and Security. Each check is called a “rule”. You can configure them and even create your own rules if you need to follow some specific guidelines for your project (e.g. validate analytics attributes, title format of pages, etc.). You c… | 2017 | Stephanie Drescher | stephaniedrescher | 2017-12-02T00:00:00+00:00 | https://24ways.org/2017/lint-the-web-forward-with-sonarwhal/ | code |
| 157 | 157 | Capturing Caps Lock | One of the more annoying aspects of having to remember passwords (along with having to remember loads of them) is that if you’ve got Caps Lock turned on accidentally when you type one in, it won’t work, and you won’t know why. Most desktop computers alert you in some way if you’re trying to enter your password to log on and you’ve enabled Caps Lock; there’s no reason why the web can’t do the same. What we want is a warning – maybe the user wants Caps Lock on, because maybe their password is in capitals – rather than something that interrupts what they’re doing. Something subtle. But that doesn’t answer the question of how to do it. Sadly, there’s no way of actually detecting whether Caps Lock is on directly. However, there’s a simple work-around; if the user presses a key, and it’s a capital letter, and they don’t have the Shift key depressed, why then they must have Caps Lock on! Simple. DOM scripting allows your code to be notified when a key is pressed in an element; when the key is pressed, you get the ASCII code for that key. Capital letters, A to Z, have ASCII codes 65 to 90. So, the code would look something like: on a key press if the ASCII code for the key is between 65 and 90 *and* if shift is pressed warn the user that they have Caps Lock on, but let them carry on end if end keypress The actual JavaScript for this is more complicated, because both event handling and keypress information differ across browsers. Your event handling functions are passed an event object, except in Internet Explorer where you use the global event object; the event object has a which parameter containing the ASCII code for the key pressed, except in Internet Explorer where the event object has a keyCode parameter; some browsers store whether the shift key is pressed in a shiftKey parameter and some in a modifiers parameter. All this boils down to code that looks something like this: keypress: function(e) { var ev = e ? e : window.event; if (!ev) { return; } var targ = ev.target ? ev.target : ev.srcElement; /… | 2007 | Stuart Langridge | stuartlangridge | 2007-12-04T00:00:00+00:00 | https://24ways.org/2007/capturing-caps-lock/ | code |
| 202 | 202 | Design Systems and CSS Grid | Recently, my client has been looking at creating a few new marketing pages for their website. They currently have a design system in place but they’re looking to push this forward into 2018 with some small and possibly some larger changes. To start with we are creating a couple of new marketing pages. As well as making use of existing components within the design systems component library there are a couple of new components. Looking at the first couple of sketch files I felt this would be a great opportunity to use CSS Grid, to me the newer components need to be laid out on that page and grid would help with this perfectly. As well as this layout of the new components and the text within it, imagery would be used that breaks out of the grid and pushes itself into the spaces where the text is aligned. The existing grid system When the site was rebuilt in 2015 the team decided to make use of Sass and Susy, a “lightweight grid-layout engine using Sass”. It was built separating the grid system from the components that would be laid out on the page with a container, a row, an optional column, and a block. To make use of the grid system on a page for a component that would take the full width of the row you would have to write something like this: <div class="grid-container"> <div class="grid-row"> <div class="grid-column-4"> <div class="grid-block"> <!-- component code here --> </div> </div> </div> </div> Using a grid system similar to this can easily create quite the tag soup. It could fill the HTML full of divs that may become complex to understand and difficult to edit. Although there is this reliance on several <div>s to lay out the components on a page it does allow a tidy way to place the component code within that page. It abstracts the layout of the page to its own code, its own system, so the components can ‘fit’ where needed. The requirements of the new grid system Moving forward I set myself some goals for what I’d like to have achieved in this new grid system: It needs to… | 2017 | Stuart Robson | stuartrobson | 2017-12-12T00:00:00+00:00 | https://24ways.org/2017/design-systems-and-css-grid/ | code |
| 191 | 191 | CSS Animations | Friend: You should learn how to write CSS! Me: … Friend: CSS; Cascading Style Sheets. If you’re serious about web design, that’s the next thing you should learn. Me: What’s wrong with <font> tags? That was 8 years ago. Thanks to the hard work of Jeffrey, Andy, Andy, Cameron, Colly, Dan and many others, learning how to decently markup a website and write lightweight stylesheets was surprisingly easy. They made it so easy even a complete idiot (OH HAI) was able to quickly master it. And then… nothing. For a long time, it seemed like there wasn’t happening anything in the land of CSS, time stood still. Once you knew the basics, there wasn’t anything new to keep up with. It looked like a great band split, but people just kept re-releasing their music in various “Best Of!” or “Remastered!” albums. Fast forward a couple of years to late 2006. On the official WebKit blog Surfin’ Safari, there’s an article about something called CSS animations. Great new stuff to play with, but only supported by nightly builds (read: very, very beta) of WebKit. In the following months, they release other goodies, like CSS gradients, CSS reflections, CSS masks, and even more CSS animation sexiness. Whoa, looks like the band got back together, found their second youth, and went into overdrive! The problem was that if you wanted to listen to their new albums, you had to own some kind of new high-tech player no one on earth (besides some early adopters) owned. Back in the time machine. It is now late 2009, close to Christmas. Things have changed. Browsers supporting these new toys are widely available left and right. Even non-techies are using these advanced browsers to surf the web on a daily basis! Epic win? Almost, but at least this gives us enough reason to start learning how we could use all this new CSS voodoo. On Monday, Natalie Downe showed you a good tutorial on Going Nuts with CSS Transitions. Today, I’m taking it one step further… Howto: A basic spinner No matter how fast internet tubes or servers are, we’ll always need spi… | 2009 | Tim Van Damme | timvandamme | 2009-12-15T00:00:00+00:00 | https://24ways.org/2009/css-animations/ | code |
| 11 | 11 | JavaScript: Taking Off the Training Wheels | JavaScript is the third pillar of front-end web development. Of those pillars, it is both the most powerful and the most complex, so it’s understandable that when 24 ways asked, “What one thing do you wish you had more time to learn about?”, a number of you answered “JavaScript!” This article aims to help you feel happy writing JavaScript, and maybe even without libraries like jQuery. I can’t comprehensively explain JavaScript itself without writing a book, but I hope this serves as a springboard from which you can jump to other great resources. Why learn JavaScript? So what’s in it for you? Why take the next step and learn the fundamentals? Confidence with jQuery If nothing else, learning JavaScript will improve your jQuery code; you’ll be comfortable writing jQuery from scratch and feel happy bending others’ code to your own purposes. Writing efficient, fast and bug-free jQuery is also made much easier when you have a good appreciation of JavaScript, because you can look at what jQuery is really doing. Understanding how JavaScript works lets you write better jQuery because you know what it’s doing behind the scenes. When you need to leave the beaten track, you can do so with confidence. In fact, you could say that jQuery’s ultimate goal is not to exist: it was invented at a time when web APIs were very inconsistent and hard to work with. That’s slowly changing as new APIs are introduced, and hopefully there will come a time when jQuery isn’t needed. An example of one such change is the introduction of the very useful document.querySelectorAll. Like jQuery, it converts a CSS selector into a list of matching elements. Here’s a comparison of some jQuery code and the equivalent without. $('.counter').each(function (index) { $(this).text(index + 1); }); var counters = document.querySelectorAll('.counter'); [].slice.call(counters).forEach(function (elem, index) { elem.textContent = index + 1; }); Solving problems no one else has! When you have to go to the internet to solve a problem, you’re forever st… | 2013 | Tom Ashworth | tomashworth | 2013-12-05T00:00:00+00:00 | https://24ways.org/2013/javascript-taking-off-the-training-wheels/ | code |
| 294 | 294 | New Tricks for an Old Dog | Much of my year has been spent helping new team members find their way around the expansive and complex codebase that is the TweetDeck front-end, trying to build a happy and productive group of people around a substantial codebase with many layers of legacy. I’ve loved doing this. Everything from writing new documentation, drawing diagrams, and holding technical architecture sessions teaches you something you didn’t know or exposes an area of uncertainty that you can go work on. In this article, I hope to share some experiences and techniques that will prove useful in your own situation and that you can impress your friends in some new and exciting ways! How do you do, fellow kids? To start with I’d like to introduce you to our JavaScript framework, Flight. Right now it’s used by twitter.com and TweetDeck although, as a company, Twitter is largely moving to React. Over time, as we used Flight for more complex interfaces, we found it wasn’t scaling with us. Composing components into trees was fiddly and often only applied for a specific parent-child pairing. It seems like an obvious feature with hindsight, but it didn’t come built-in to Flight, and it made reusing components a real challenge. There was no standard way to manage the state of a component; they all did it slightly differently, and the technique often varied by who was writing the code. This cost us in maintainability as you just couldn’t predict how a component would be built until you opened it. Making matters worse, Flight relied on events to move data around the application. Unfortunately, events aren’t good for giving structure to complex logic. They jump around in a way that’s hard to understand and debug, and force you to search your code for a specific string — the event name‚ to figure out what’s going on. To find fixes for these problems, we looked around at other frameworks. We like React for it’s simple, predictable state management and reactive re-render flow, and Elm for bringing strict functional programming to everyone. But when you ha… | 2016 | Tom Ashworth | tomashworth | 2016-12-18T00:00:00+00:00 | https://24ways.org/2016/new-tricks-for-an-old-dog/ | code |
| 175 | 175 | Front-End Code Reusability with CSS and JavaScript | Most web standards-based developers are more than familiar with creating their sites with semantic HTML with lots and lots of CSS. With each new page in a design, the CSS tends to grow and grow and more elements and styles are added. But CSS can be used to better effect. The idea of object-oriented CSS isn’t new. Nicole Sullivan has written a presentation on the subject and outlines two main concepts: separate structure and visual design; and separate container and content. Jeff Croft talks about Applying OOP Concepts to CSS: I can make a class of .box that defines some basic layout structure, and another class of .rounded that provides rounded corners, and classes of .wide and .narrow that define some widths, and then easily create boxes of varying widths and styles by assigning multiple classes to an element, without having to duplicate code in my CSS. This concept helps reduce CSS file size, allows for great flexibility, rapid building of similar content areas and means greater consistency throughout the entire design. You can also take this concept one step further and apply it to site behaviour with JavaScript. Build a versatile slideshow I will show you how to build multiple slideshows using jQuery, allowing varying levels of functionality which you may find on one site design. The code will be flexible enough to allow you to add previous/next links, image pagination and the ability to change the animation type. More importantly, it will allow you to apply any combination of these features. Image galleries are simply a list of images, so the obvious choice of marking the content up is to use a <ul>. Many designs, however, do not cater to non-JavaScript versions of the website, and thus don’t take in to account large multiple images. You could also simply hide all the other images in the list, apart from the first image. This method can waste bandwidth because the other images might be downloaded when they are never going to be seen. Taking this second concept — only showing one image — the only co… | 2009 | Trevor Morris | trevormorris | 2009-12-06T00:00:00+00:00 | https://24ways.org/2009/front-end-code-reusability-with-css-and-javascript/ | code |
| 76 | 76 | Giving CSS Animations and Transitions Their Place | CSS animations and transitions may not sit squarely in the realm of the behaviour layer, but they’re stepping up into this area that used to be pure JavaScript territory. Heck, CSS might even perform better than its JavaScript equivalents in some cases. That’s pretty serious! With CSS’s new tricks blurring the lines between presentation and behaviour, it can start to feel bloated and messy in our CSS files. It’s an uncomfortable feeling. Here are a pair of methods I’ve found to be pretty helpful in keeping the potential bloat and wire-crossing under control when CSS has its hands in both presentation and behaviour. Same eggs, more baskets Structuring your CSS to have separate files for layout, typography, grids, and so on is a fairly common approach these days. But which one do you put your transitions and animations in? The initial answer, as always, is “it depends”. Small effects here and there will likely sit just fine with your other styles. When you move into more involved effects that require multiple animations and some logic support from JavaScript, it’s probably time to choose none of the above, and create a separate CSS file just for them. Putting all your animations in one file is a huge help for code organization. Even if you opt for a name less literal than animations.css, you’ll know exactly where to go for anything CSS animation related. That saves time and effort when it comes to editing and maintenance. Keeping track of which animations are still currently used is easier when they’re all grouped together as well. And as an added bonus, you won’t have to look at all those horribly unattractive and repetitive prefixed @-keyframe rules unless you actually need to. An animations.css file might look something like the snippet below. It defines each animation’s keyframes and defines a class for each variation of that animation you’ll be using. Depending on the situation, you may also want to include transitions here in a similar way. (I’ve found defining transitions as their own class, or mixin, … | 2012 | Val Head | valhead | 2012-12-08T00:00:00+00:00 | https://24ways.org/2012/giving-css-animations-and-transitions-their-place/ | code |
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