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| Link | rowid | title | contents | year | author ▼ | author_slug | published | url | topic |
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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 |
| 317 | 317 | Putting the World into "World Wide Web" | Despite the fact that the Web has been international in scope from its inception, the predominant mass of Web sites are written in English or another left-to-right language. Sites are typically designed visually for Western culture, and rely on an enormous body of practices for usability, information architecture and interaction design that are by and large centric to the Western world. There are certainly many reasons this is true, but as more and more Web sites realize the benefits of bringing their products and services to diverse, global markets, the more demand there will be on Web designers and developers to understand how to put the World into World Wide Web. Internationalization According to the W3C, Internationalization is: “…the design and development of a product, application or document content that enables easy localization for target audiences that vary in culture, region, or language.” Many Web designers and developers have at least heard, if not read, about Internationalization. We understand that the Web is in fact worldwide, but many of us never have the opportunity to work with Internationalization. Or, when we do, think of it in purely technical terms, such as “which character set do I use?” At first glance, it might seem to many that Internationalization is the act of making Web sites available to international audiences. And while that is in fact true, this isn’t done by broad-stroking techniques and technologies. Instead, it involves a far more narrow understanding of geographical, cultural and linguistic differences in specific areas of the world. This is referred to as localization and is the act of making a Web site make sense in the context of the region, culture and language(s) the people using the site are most familiar with. Internationalization itself includes the following technical tasks: Ensuring no barrier exists to the localization of sites. Of critical importance in the planning stages of a site for Internationalized audiences, the role of the developer is to ensu… | 2005 | Molly Holzschlag | mollyholzschlag | 2005-12-09T00:00:00+00:00 | https://24ways.org/2005/putting-the-world-into-world-wide-web/ | ux |
| 329 | 329 | Broader Border Corners | A note from the editors: Since this article was written the CSS border-radius property has become widely supported in browsers. It should be preferred to this image technique. A quick and easy recipe for turning those single-pixel borders that the kids love so much into into something a little less right-angled. Here’s the principle: We have a box with a one-pixel wide border around it. Inside that box is another box that has a little rounded-corner background image sitting snugly in one of its corners. The inner-box is then nudged out a bit so that it’s actually sitting on top of the outer box. If it’s all done properly, that little background image can mask the hard right angle of the default border of the outer-box, giving the impression that it actually has a rounded corner. Take An Image, Finely Chopped Add A Sprinkle of Markup <div id="content"> <p>Lorem ipsum etc. etc. etc.</p> </div> Throw In A Dollop of CSS #content { border: 1px solid #c03; } #content p { background: url(corner.gif) top left no-repeat; position: relative; left: -1px; top: -1px; padding: 1em; margin: 0; } Bubblin’ Hot The content div has a one-pixel wide red border around it. The paragraph is given a single instance of the background image, created to look like a one-pixel wide arc. The paragraph is shunted outside of the box – back one pixel and up one pixel – so that it is sitting over the div’s border. The white area of the image covers up that part of the border’s corner, and the arc meets up with the top and left border. Because, in this example, we’re applying a background image to a paragraph, its top margin needs to be zeroed so that it starts at the top of its container. Et voilà. Bon appétit. Extra Toppings If you want to apply a curve to each one of the corners and you run out of meaningful markup to hook the background images on to, throw some spans or divs in the mix (there’s nothing wrong … | 2005 | Patrick Griffiths | patrickgriffiths | 2005-12-14T00:00:00+00:00 | https://24ways.org/2005/broader-border-corners/ | design |
| 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 |
| 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 |
| 330 | 330 | An Explanation of Ems | Ems are so-called because they are thought to approximate the size of an uppercase letter M (and so are pronounced emm), although 1em is actually significantly larger than this. The typographer Robert Bringhurst describes the em thus: The em is a sliding measure. One em is a distance equal to the type size. In 6 point type, an em is 6 points; in 12 point type an em is 12 points and in 60 point type an em is 60 points. Thus a one em space is proportionately the same in any size. To illustrate this principle in terms of CSS, consider these styles: #box1 { font-size: 12px; width: 1em; height: 1em; border:1px solid black; } #box2 { font-size: 60px; width: 1em; height: 1em; border: 1px solid black; } These styles will render like: M and M Note that both boxes have a height and width of 1em but because they have different font sizes, one box is bigger than the other. Box 1 has a font-size of 12px so its width and height is also 12px; similarly the text of box 2 is set to 60px and so its width and height are also 60px. | 2005 | Richard Rutter | richardrutter | 2005-12-02T00:00:00+00:00 | https://24ways.org/2005/an-explanation-of-ems/ | design |
| 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 |
| 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 |
| 328 | 328 | Swooshy Curly Quotes Without Images | The problem Take a quote and render it within blockquote tags, applying big, funky and stylish curly quotes both at the beginning and the end without using any images – at all. The traditional way Feint background images under the text, or an image in the markup housed in a little float. Often designers only use the opening curly quote as it’s just too difficult to float a closing one. Why is the traditional way bad? Well, for a start there are no actual curly quotes in the text (unless you’re doing some nifty image replacement). Thus with CSS disabled you’ll only have default blockquote styling to fall back on. Secondly, images don’t resize, so scaling text will have no affect on your graphic curlies. The solution Use really big text. Then it can be resized by the browser, resized using CSS, and even be restyled with a new font style if you fancy it. It’ll also make sense when CSS is unavailable. The problem Creating “Drop Caps” with CSS has been around for a while (Big Dan Cederholm discusses a neat solution in that first book of his), but drop caps are normal characters – the A to Z or 1 to 10 – and these can all be pulled into a set space and do not serve up a ton of whitespace, unlike punctuation characters. Curly quotes aren’t like traditional characters. Like full stops, commas and hashes they float within the character space and leave lots of dead white space, making it bloody difficult to manipulate them with CSS. Styles generally fit around text, so cutting into that character is tricky indeed. Also, all that extra white space is going to push into the quote text and make it look pretty uneven. This grab highlights the actual character space: See how this is emphasized when we add a normal alphabetical character within the span. This is what we’re dealing with here: Then, there’s size. Call in a curly quote at less than 300% font-size and it ain’t gonna look very big. The white space it creates will be big enough, but the curlies will be way too small. We need more like 700% (as in this … | 2005 | Simon Collison | simoncollison | 2005-12-21T00:00:00+00:00 | https://24ways.org/2005/swooshy-curly-quotes-without-images/ | business |
| 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 |
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