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WebAIM: Accessibility of Rich Internet Applications - 0 views

  • WAI-ARIA (Accessible Rich Internet Applications or ARIA) is a W3C protocol for enhancing and supporting accessibility of scripted and dynamic content.
  • ARIA provides accessible interactive controls (such as tree menus, drag and drop, sliders, sort controls, etc.), content roles for identifying page structure (navigation, search, main content, etc.), areas that can be dynamically updated (called "live regions" in ARIA), better support for keyboard accessibility and interactivity, and much more.
  • WAI-ARIA provides the ability for developers to specify roles for document areas (and many other things).
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  • accessibility issues with rich internet applications can be characterized as: Providing the semantic structure of page areas and functionality (e.g., navigation, main content, search, etc.) Maintaining accessibility of content that is dynamic and may change within the page (e.g., AJAX content updates) Allowing certain non-focusable page elements to receive keyboard focus (e.g., setting focus to an error message within the page) Providing keyboard and screen reader accessibility with complex widgets and navigation elements (e.g., sliders, menu trees, etc.)
  • ARIA is being implemented into many scripting libraries (such as jQuery, Dojo, YUI, and GWT). While developers can certainly implement ARIA into their advanced widgets and applications, using ARIA-supported libraries greatly simplifies the process of providing this level of accessibility.
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The Accessibility of WAI-ARIA · An A List Apart Article - 0 views

  • Pages semantically enriched through WAI-ARIA do not currently validate, but this drawback is acceptable: Common browsers do not mind the additional markup.
  • Some sites currently circumvent the validation problem by adding WAI-ARIA attributes to the source code via a script that is executed when the page loads.
  • in HTML5, WAI-ARIA validates
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  • as long as older screen reader/browser combinations incapable of interpreting WAI-ARIA still constitute a significant part of the installed base, web designers who care for accessibility should use WAI-ARIA markup only to enrich their sites. They should not rely on it.
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Using ARIA - 0 views

  • aria-describedby with single or multiple id references
  • aria-label and aria-labelledby have similar behaviour in screen readers and the Accessibility API, but aria-label should be reserved for when there is no visible text on the page to reference or when keeping track of id values would be too difficult.
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How Can I Validate (X)HTML + ARIA? | The Paciello Group BlogThe Paciello Group Blog - 0 views

  • The DTD I have used is the HTML 4.01 loose DTD with ARIA attributes added
  • A way I have developed to do this is by creating a bookmarklet that takes the innerHTML of a document (without the DOCTYPE) and adds the custom DOCTYPE to it and then sends it to the W3C validator: HTML4.01-loose+ARIA Checker (add as a favorite to try it out)
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HTML5 Accessibility Chops: When to use an ARIA role | The Paciello Group Blog - 0 views

  • The situation for new HTML5 elements is different and likely to remain so for some time. It will be years before New HTML5 elements get robust accessibility support implemented across browsers and platforms. This is particularly so for non interactive elements such as the new HTML5 structural elements because  accessibility APIs in general do not have defined roles for many non interactive elements. In this case it is recommended to add the appropriate ARIA roles to elements that are meant to convey meaning but are effectively meaningless due to lack of implemented accessibility support. For example, adding role=navigation to a nav element fills the gaps in support for HTML5 semantics as ARIA  is more robustly  supported by most modern browsers and assistive technology:
  • <nav role=”navigation”>
  • Authors/developers can safely assume that any element that has been around since HTML 4.0 is already accessibility supported in browsers that support accessibility. So they do not need a default implicit role added.
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Don't Use The Placeholder Attribute - Smashing Magazine - 0 views

  • To recap, the placeholder attribute: Can’t be automatically translated; Is oftentimes used in place of a label, locking out assistive technology; Can hide important information when content is entered; Can be too light-colored to be legible; Has limited styling options; May look like pre-filled information and be skipped over.
  • Move the placeholder content above the input, but below the label:
  • Development Here’s how to translate our designed example to code:
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  • aria-describedby ensures that the p content will be described last, after the label’s content and the kind of input it is associated with.
  • By using aria-describedby to programmatically associate the input with the p element, we are creating a priority of information for screen readers that has parity with what a person browsing without a screen reader would experience.
  • The floating label effect, a close cousin to this phenomenon, oftentimes utilizes the placeholder attribute in place of a label, as well.
  • Content hidden by an on-screen keyboard. 3rd party keyboards with larger heights may have a greater risk of blocking important content.
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    Not only argues for not using the placeholder attribute but also describes an inclusive input hint and how to code it.
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WebAIM: To ARIA! The Cause of, and Solution to, All Our Accessibility Problems - 0 views

  • this role is often used extraneously (<button role="button">)
  • aria-label can also override other important information such as link text
  • aria-expanded This can tell screen reader users that activating a button or link will cause content to expand and collapse below (e.g., an accordion), and also whether it is currently collapsed or expanded.
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untitled - 0 views

  • The upsurge in VoiceOver could be explained in part by iPhone now providing VoiceOver support; all of a sudden there is a very real reason to switch to Mac if you can use a screen reader you are familiar with on both your desktop and mobile.
  • The upsurge in VoiceOver could be explained in part by iPhone now providing VoiceOver support; all of a sudden there is a very real reason to switch to Mac if you can use a screen reader you are familiar with on both your desktop and mobile.
  • It’s good to also see the free, open source NVDA on the up. They’ve worked hard to include WAI-ARIA support and are becoming a key tool for web developers when testing.
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  • We’re still faced with one massive problem with mobile access however and that’s the lack of an open, cross platform accessibility API that mobile screen readers can hook into. On desktop we have IAccessible2, MSAA and UI Automation (amongst others) but on mobile users are tied into one platform often only supporting one browser (such as iPhone, Blackberry RIM and others) so while desktop has opened up we find ourselves in a 1990’s type impasse with users left with little room to choose on mobile. Opera works well with VoiceOver but we have no way of telling if it works on the iPhone as it’s not supported. My hope is that with more users there’ll be more momentum behind breaking this stand off and opening up the market and ultimately giving users not only choice but portability between platforms.
  • It’s good to also see the free, open source NVDA on the up. They’ve worked hard to include WAI-ARIA support and are becoming a key tool for web developers when testing.
  • « Yay factor! Going global with standards and BBC Click on web accessibility Make video accessible, localised, mobile and searchable by captioning » Screen reader software usage shifts on desktop and mobile Nov 4th, 2009 by iheni WebAim released their 2009 Screen Reader Survey last week, a follow up from last years Screen Reader survey. Very good reading it makes too but of particular interest are results around screen reader choice on the desktop and increased screen reader access on mobile. For years it’s felt like screen reader users have mainly used IE on the desktop in combination with the major screen readers Jaws by Freedom Scientific and WindowEyes by GW Micro. It’s not that other platforms don’t support screen readers (we have Orca on Linux, VoiceOver on Mac) it’s just that IE seems to have dominated. As such what types of content and web technologies users can and can’t access has very much been driven by what the three software vendors Microsoft, Freedom Scientific and GW Micro have supported. This has made access to the open web a bit lopsided cutting down on choice for the end user, competition and by extension innovation. SVG is an example of a web technology that has possibly suffered by not being supported by IE and in turn by Jaws and WindowEyes. What’s interesting to see in this year’s survey is that Jaws and WindowEyes – while still the most used – have some stiff competition at snapping at their heels from open source, free screen readers (NVDA and  SAToGo ) and VoiceOver which is available with Mac: JAWS 75.2% Window Eyes 23.5% VoiceOver 14.6% System Access or System Access To Go 22.3% NVDA 25.6% While this year’s stats show little shift for Jaws and WindowEyes usage overall there is a significant leap forward for NVDA (NonVisual Desktop Access) and VoiceOver: Of the 1121 respondents, 74% use JAWS, 23% use Window-Eyes, 8% use NVDA, and 6% use VoiceOver. While several other screen readers were reported, these were the most prominently reported. The upsurge in VoiceOver could be explained in part by iPhone now providing VoiceOver support; all of a sudden there is a very real reason to switch to Mac if you can use a screen reader you are familiar with on both your desktop and mobile. This could also explain the increase of screen reader users on mobile reported this year with 53% of survey respondents with disabilities confirming they use a screen reader on a mobile device. This is up from 12% last year (although last year’s survey doesn’t distinguish disabled from non-disabled users). I wonder how much this is to do with the ‘iPhone Factor’ but also can’t help thinking that social networking has done for the mobile web what Kylie Minogue did for Agent Provocateur – everybody wants some. And for me at least 2009 feels like the year that we all sat up and paid attention to the potential of mobile for people with disabilities. We’re still faced with one massive problem with mobile access however and that’s the lack of an open, cross platform accessibility API that mobile screen readers can hook into. On desktop we have IAccessible2, MSAA and UI Automation (amongst others) but on mobile users are tied into one platform often only supporting one browser (such as iPhone, Blackberry RIM and others) so while desktop has opened up we find ourselves in a 1990’s type impasse with users left with little room to choose on mobile. Opera works well with VoiceOver but we have no way of telling if it works on the iPhone as it’s not supported. My hope is that with more users there’ll be more momentum behind breaking this stand off and opening up the market and ultimately giving users not only choice but portability between platforms.
  • We’re still faced with one massive problem with mobile access however and that’s the lack of an open, cross platform accessibility API that mobile screen readers can hook into.
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    "We're still faced with one massive problem with mobile access however and that's the lack of an open, cross platform accessibility API that mobile screen readers can hook into."
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HTML5 Accessibility: aria-hidden and role="presentation" | Unrepentant - 0 views

  • any user accessing the Accessibility API
  • aria-hidden=”true” + role=”presentation”
    • Vernon Fowler
       
      Use both attributes for cases where browser/OS/screen-reader combinations don't support WAI-ARIA.
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Accessible Breadcrumb Navigation - 0 views

  • Being that a breadcrumb is contained within a nav element, it will be surfaced as a landmark to screen readers. Providing it an accessible name of "breadcrumb" (or whatever term may be more meaningful to your site) will help differentiate it from any other navigation landmarks in the current document, such as the primary navigation
  • using aria-label to provide an accessible name, and aria-current to indicate the currently active link
  • screen reader support for aria-current is rather good
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  • Some other breadcrumb patterns remove the <a> element, or at least the href from the link. These examples retain the a href for current link, as without it, people using a screen reader and navigating by links, or via focusable content with the tab key would not come across the currently active link.
  • Breadcrumbs are useful on large websites where pages have clearly defined hierarchy.
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Turn Firefox into a screen reader with Fire Vox | 456 Berea Street - 0 views

  • For anyone who hasn’t heard of Fire Vox, it is a free, open source screen reader extension for Firefox that works on Windows, Mac OS X, and Linux. Among other things it has support for WAI-ARIA and the CSS3 Speech Module, and is a good alternative to VoiceOver if you’re on a Mac and need a screen reader for web browsing (or testing).
  • For developers Fire Vox makes it easy to check how their sites work in a screen reader. Sure, it’s just one of several available screen readers, but this one is free and cross-platform. In other words there is no reason for you not to have it installed, so grab a copy right now.
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