The polyfill for a more accessible HTML5.

While most browsers work all right with the new semantic elements of HTML5, they don’t add the ARIA accessibility attributes that the specification demands. This small JavaScript adds those attributes to enhance accessibility of web sites.

Just link to the accessifyhtml5.js file and call the AccessifyHTML5-Function at the bottom of your page right before the closing </body> tag:

<script src="accessifyhtml5.js"></script>
<script>AccessifyHTML5();</script>

There are some options you’re able to specify as they can be on each web page only once.

• header: A CSS selector that selects exactly one element on the page which will get the role banner.
• footer: A CSS selector that selects exactly one element on the page which will get the role contentinfo.
• main: A CSS selector that selects exactly one element on the page which will get the role main.

<script src="accessifyhtml5.js"></script>
<script>
	AccessifyHTML5({
		header:"body>header", 
		footer:"body>footer",
		main: "#main"
	});
</script>

There is a jQuery variant of the script that is a bit smaller, so if you’re using jQuery anyway, go ahead.

<script src="accessifyhtml5.jquery.js"></script>
<script>AccessifyHTML5();</script>

I’ve created a small CDN that should serve the JS file quite fast. I recommend to use the code here and copy it into your project’s JS file. Code:

<script src="//yatil-cdn.s3.amazonaws.com/accessifyhtml5.min.js"></script>
<script>AccessifyHTML5();</script>

or

<script src="//yatil-cdn.s3.amazonaws.com/accessifyhtml5.jquery.min.js"></script>
<script>AccessifyHTML5();</script>

• Added support for specifying the main part of the web site using the main parameter (as requested by @yellowled).
• The script won’t overwrite your specified roles.

• Added non-jQuery version (Using querySelector, adds support in IE8+, FF3.5+, Opera 10+, Safari, Chrome as well as iOS, Android and Opera Mobile)
• Removed header.site getting role banner and footer.site getting role contentinfo -> If you need to add a class, you can also add the role directly to the HTML
• Thanks to @adickson you can just add selectors for banner and contentinfo when calling the function
• You’ll now have to call AccessifyHTML5-function like that: @AccessifyHTML5({header:"#header", footer:"#footer"});@

• @adickson for a really good non-jQuery solution
• @stevefaulkner for his work exploring html5 a11y
• @paddya91 for object notation
• @ginader for reporting a typo
• @webaxe for reporting an error
• @divya for keeping me on track for a non-jQuery solution
• @mathias for improving my javascript

• According to @jkiss, Window-Eyes 7.11 struggles with aria-roles and HTML5, this is nothing I can solve with this script but is a screen reader issue. See: https://twitter.com/#!/jkiss/status/5488643711967232
• Firefox adds roles by itself, so this script is not needed for those browsers. I haven’t found a way to detect if those implicit roles are set, so I can’t test that at the moment.

This project is MIT licensed.

• Eric Eggert
• Twitter: @yatil
• Blog: http://yatil.net