--- 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 AT. ### Skip navigation 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). {% highlight html %}

The main page content.

{% endhighlight %} ### Nested headings When nesting headings (`

` - `

`), your primary document header should be an `

`. Subsequent headings should make logical use of `

` - `

` 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)