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---
layout: page
title: Accessibility
---

Bootstrap follows common web standards and—with minimal extra effort—can be used to create sites that are accessible to those using <abbr title="Assistive Technology" class="initialism">AT</abbr>.

### Skip navigation
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If your navigation contains many links and comes before the main content in the DOM, add a `Skip to main content` link [before the navigation](http://a11yproject.com/posts/skip-nav-links/). Using the `.sr-only` class will visually hide the skip link, and the `.sr-only-focusable` class will ensure that the link becomes visible once focused (for sighted keyboard users).
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{% highlight html %}
<body>
  <a href="#content" class="sr-only sr-only-focusable">Skip to main content</a>
  <div class="container" id="content">
    The main page content.
  </div>
</body>
{% endhighlight %}

### Nested headings

When nesting headings (`<h1>` - `<h6>`), your primary document header should be an `<h1>`. Subsequent headings should make logical use of `<h2>` - `<h6>` such that screen readers can construct a table of contents for your pages.

Learn more at [HTML CodeSniffer](http://squizlabs.github.io/HTML_CodeSniffer/Standards/Section508/) and [Penn State's Accessability](http://accessibility.psu.edu/headings).

### Additional resources

- ["HTML Codesniffer" bookmarklet for identifying accessibility issues](https://github.com/squizlabs/HTML_CodeSniffer)
- [The A11Y Project](http://a11yproject.com/)
- [MDN accessibility documentation](https://developer.mozilla.org/en-US/docs/Accessibility)