Undefined attribute name (aria-hidden)

Question

I'm using Eclipse Kepler SR2 (4.3.2). For jsp pages, the JSP validator reports this warning on a bootstrap alert box like the following

<div class="alert alert-danger alert-dismissable">
    <button type="button" class="close" data-dismiss="alert" aria-hidden="true">x</button>
    An error occurred
</div>

The closest similar question I've seen is Why does Eclipse creates warning on HTML script tag? but I'm assuming the latest version of Eclipse has HTML5 support.

Is the warning valid, or is there a way to get it to go away.

Answer 1

Upgraded to Eclipse Luna and this warning isn't shown anymore so I guess the solution now is to upgrade to Luna.