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Skip link workarounds for Chrome and IE 

Add tabindex="-1" to main #content to work around bug in Chrome (and old
WebKits) and IE
Update advice in accessibility section
Include patch in docs CSS to suppress outline when #content is focused
(particularly as Chrome sets focus as result of mouse click for
tabindex="-1" elements)
This commit is contained in:
Patrick H. Lauke 2015-01-31 11:19:19 +00:00
parent 4d4c7c4051
commit c0892d1470
4 changed files with 13 additions and 3 deletions
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7
docs/_includes/getting-started/accessibility.html
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@ -4,11 +4,16 @@
<h3>Skip navigation</h3> <h3>Skip navigation</h3>
<p>If your navigation contains many links and comes before the main content in the DOM, add a <code>Skip to main content</code> link before the navigation <a href="http://a11yproject.com/posts/skip-nav-links/">(read why)</a>. Using the <code>.sr-only</code> class will visually hide the skip link, and the <code>.sr-only-focusable</code> class will ensure that the link becomes visible once focused (for sighted keyboard users).</p> <p>If your navigation contains many links and comes before the main content in the DOM, add a <code>Skip to main content</code> link before the navigation <a href="http://a11yproject.com/posts/skip-nav-links/">(read why)</a>. Using the <code>.sr-only</code> class will visually hide the skip link, and the <code>.sr-only-focusable</code> class will ensure that the link becomes visible once focused (for sighted keyboard users).</p>
<div class="bs-callout bs-callout-danger" id="callout-tables-striped-ie8">
<p>Due to a long-standing <a href="https://code.google.com/p/chromium/issues/detail?id=262171" title="Chromium bug tracker - Issue 262171: Focus should cycle from named anchor">bug in Chrome</a> and Internet Explorer, you will need to make sure that the target of your skip link is at least programmatically focusable by adding <code>tabindex="-1"</code>.</p>
<p>In addition, you may want to explicitly suppress a visible focus indication on the target (particularly as Chrome currently also sets focus on elements with <code>tabindex="-1"</code> when they are clicked with the mouse) with <code>#content:focus { outline: none; }</code>.</p>
<p>Note that this bug will also affect any other in-page links your site may be using, rendering them useless for keyboard users. You may consider adding a similar stop-gap fix to all other named anchors / fragment identifiers that act as link targets.</p>
</div>
{% highlight html %} {% highlight html %}
<body> <body>
<a href="#content" class="sr-only sr-only-focusable">Skip to main content</a> <a href="#content" class="sr-only sr-only-focusable">Skip to main content</a>
... ...
<div class="container" id="content"> <div class="container" id="content" tabindex="-1">
<!-- The main page content --> <!-- The main page content -->
</div> </div>
</body> </body>

2
docs/_layouts/default.html
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@ -11,7 +11,7 @@
{% include nav/main.html %} {% include nav/main.html %}
<!-- Docs page layout --> <!-- Docs page layout -->
<div class="bs-docs-header" id="content"> <div class="bs-docs-header" id="content" tabindex="-1">
<div class="container"> <div class="container">
<h1>{{ page.title }}</h1> <h1>{{ page.title }}</h1>
<p>{{ page.lead }}</p> <p>{{ page.lead }}</p>

5
docs/assets/css/src/docs.css
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@ -93,6 +93,7 @@ body {
* Fancy skip link * Fancy skip link
* *
* Make it look a bit less "bare bones" * Make it look a bit less "bare bones"
* Also includes focus suppression for the Chrome tabindex="-1" workaround
*/ */
#skippy { #skippy {
@ -108,6 +109,10 @@ body {
outline: 1px dotted; outline: 1px dotted;
} }
#content:focus {
outline: none;
}
/* /*
* Main navigation * Main navigation

2
docs/index.html
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@ -4,7 +4,7 @@ title: Bootstrap &middot; The world's most popular mobile-first and responsive f
--- ---
<main class="bs-docs-masthead" id="content" role="main"> <main class="bs-docs-masthead" id="content" role="main" tabindex="-1">
<div class="container"> <div class="container">
<span class="bs-docs-booticon bs-docs-booticon-lg bs-docs-booticon-outline">B</span> <span class="bs-docs-booticon bs-docs-booticon-lg bs-docs-booticon-outline">B</span>
<p class="lead">Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.</p> <p class="lead">Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.</p>