Will HTML5 make the use of WAI-ARIA in HTML redundant? the short answer is definitely not. There are many ARIA roles and properties that are not provided by native elements and attributes in HTML5. Also developers still have the desire to roll their own interactive controls or web components even though they have been available in HTML as native elements for 15 years, why would this suddenly change with HTML5?
First rule of ARIA use (never forget):
If you can use a native HTML element [HTML5] or attribute with the semantics and behaviour you require already built in, instead of re-purposing an element and adding an ARIA role, state or property to make it accessible, then do so.
Examples from real world web apps : a button and a link
Developers have had for 15 years a number of native elements they can use for buttons and the
a element for links, provided in HTML 4, all of which provide built in mouse and keyboard interaction and convey role, state and name properties to accessibility APIs:
But still in 2014 companies like Twitter and Google, choose to emulate a button with code (not to mention the associated scripting) such as this:
<a data-placement="bottom" class="js-tooltip global-dm-nav" href="#" role="button" data-original-title="Direct messages"> <span class="Icon Icon--dm Icon--large"></span> <span class="dm-new"><span class="count-inner"></span></span> <span class="visuallyhidden">Direct messages</span> </a>
<div tabindex="0" role="button" act="20" class="T-I J-J5-Ji nu T-I-ax7 L3" style="-moz-user-select: none;" data-tooltip="Refresh" aria-label="Refresh"> <div class="asa"> <div class="asf T-I-J3 J-J5-Ji"> </div></div></div>
and a link like this:
<div role="link" tabindex="0" idlink="" class="py pr" id=":i"> <h2 id=":k" class="pw">Quick Links</h2> <div class="qn"></div></div>
Note: First example from twitter, others are from Google’s Gmail application.
The reason is probably because they cannot apply the styles they want to native interactive elements, but who knows? What is important for accessibility is if developers choose to code in this way, they now have a method to provide the needed accessibility information. It would be preferable that they used the available native HTML elements, but if they do not, then ARIA provides what HTML alone cannot.
ARIA used in native HTML implementations (there goes the neighborhood):
<input type="week"> #shadow root (user agent) <div pseudo="-webkit-datetime-edit" id="date-time-edit" datetimeformat="'Week 'ww, yyyy"> <div pseudo="-webkit-datetime-edit-fields-wrapper"> <div pseudo="-webkit-datetime-edit-text">Week </div> <span role="spinbutton" aria-valuetext="blank" aria-valuemin="1" aria-valuemax="53" pseudo="-webkit-datetime-edit-week-field">--</span> <div pseudo="-webkit-datetime-edit-text">, </div> <span role="spinbutton" aria-valuetext="blank" aria-valuemin="1" aria-valuemax="275760" pseudo="-webkit-datetime-edit-year-field">----</span> </div></div></input>
Aria roles and properties not available in HTML5
Below are listed the ARIA roles and properties. not considered to be available natively in HTML5. It is clear that many roles and properties provided by ARIA which can be used to convey information to users are not available in HTML5.
ARIA States and Properties (aria-* attributes)
Stop adding ARIA cruft to your crappy markup. Just learn HTML. Keep it simple.
— Krijn Hoetmer (@krijnhoetmer) September 29, 2014
— Steve Faulkner (@stevefaulkner) October 1, 2014