- From: Jason Kiss <jason@accessibleculture.org>
- Date: Wed, 20 May 2015 13:38:02 +1200
- To: www-validator@w3.org
A trailing space in a space-separated list of IDREFs in @aria-controls or @aria-labelled causes validation errors. An example of the error message is "The aria-controls attribute must point to an element in the same document." Removing the trailing space clears the error. Consider the following HTML: --- html begins --- <button type=button class=accordion-expand aria-controls="accordion-content-195 accordion-content-196 accordion-content-197 accordion-content-198 ">Trailing space</button> <a href="#" aria-labelledby="accordion-content-195 accordion-content-196 accordion-content-197 accordion-content-198 ">Foo - trailing space</a> <button type=button class=accordion-expand aria-controls="accordion-content-195 accordion-content-196 accordion-content-197 accordion-content-198">No trailing space</button> <a href="#" aria-labelledby="accordion-content-195 accordion-content-196 accordion-content-197 accordion-content-198">Bar - no trailing space</a> <div id="accordion-content-195">block 1</div> <div id="accordion-content-196">block 2</div> <div id="accordion-content-197">block 3</div> <div id="accordion-content-198">block 4</div> --- html ends --- The first button and link pair have aria attributes with space-separated ID references with a trailing space, while the second pair don't. The errors are raised only for the first button and link. The algorithm for parsing space separated tokens [1] suggests this is a bug. Jason [1] http://www.w3.org/html/wg/drafts/html/master/infrastructure.html#set-of-space-separated-tokens
Received on Wednesday, 20 May 2015 01:38:30 UTC