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Improve accessibility (Section 508, WCAG)

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This PR significantly improves Bootstrap's accessibility for users of assistive technology, such as screen readers. Some of the these changes add additional markup to the source examples, but we believe that the sacrifice in readability is worth achieving more widespread usage of accessibility best-practices.

What was done
- Added lots of [WAI-ARIA attributes](http://www.w3.org/WAI/intro/aria)
- Added `.sr-only` helper class, that is only readable by screen readers (and invisible for all other users). This lets us - make progress bars and paginations accessible to screen reading users.
- Advised users to always use label elements. For inline forms, they can hide them with `.sr-only`
- Added 'Skip navigation' link
- Added "Accessibility" section to getting-started.html.

What *wasn't* done
- Contrast issues (twbs#3572)
- Tooltips (twbs#8469)
- Documentation re: usage of icons, since they now live in a separate repo

Major props to all that contributed: @bensheldon, @jasonlally, @criscristina, and @louh. Feel free to chime in, guys, if I've left anything out.
This commit is contained in:
adamjacobbecker
2013-08-06 21:25:36 -07:00
parent d1e712d848
commit a8d95d4721
14 changed files with 189 additions and 70 deletions
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_layouts/default.html
+5 -4
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@@ -6,12 +6,13 @@
<!-- Place anything custom after this. -->
</head>
<body>
<a class="sr-only" href="#content">Skip navigation</a>
<!-- Docs master nav -->
{% include nav-main.html %}
<!-- Docs page layout -->
<div class="bs-header">
<div class="bs-header" id="content" role="banner">
<div class="container">
<h1>{{ page.title }}</h1>
<p>{{ page.lead }}</p>
@@ -25,7 +26,7 @@
<div class="container bs-docs-container">
<div class="row">
<div class="col-lg-3">
<div class="bs-sidebar">
<div class="bs-sidebar" role="complementary">
<ul class="nav bs-sidenav">
{% if page.slug == "getting-started" %}
{% include nav-getting-started.html %}
@@ -41,7 +42,7 @@
</ul>
</div>
</div>
<div class="col-lg-9">
<div class="col-lg-9" role="main">
{{ content }}
</div>
</div>
@@ -50,7 +51,7 @@
<!-- Footer
================================================== -->
<footer class="bs-footer">
<footer class="bs-footer" role="contentinfo">
{% include social-buttons.html %}
<p>Designed and built with all the love in the world by <a href="http://twitter.com/mdo" target="_blank">@mdo</a> and <a href="http://twitter.com/fat" target="_blank">@fat</a>.</p>