Cannot add role="navigation" to wp_nav_menu() - nav

Question

I would like my custom nav menu to have an attribute "role" with value of "navigation". It does not appear that wp_nav_menu() accepts an attributes argument. Am I missing something?
<nav role="navigation">...</nav>

Answer 1

Was looking for a while but then saw that you can set 'container' to false.
<nav role="navigation">
<?php
$defaults = array(
'container' => false,
'items_wrap' => '<ul>%3$s</ul>'
);
wp_nav_menu( $defaults );
?>
</nav>
Returns a simple navigation without divs in the middle.

Answer 2

A little late, but here is how to do it:
<?php
echo strip_tags( wp_nav_menu( array(
'echo' => false,
'items_wrap' => '<nav role="navigation">%3$s</nav>',
) ), '<a><nav>' );
?>

Answer 3

Here's my way to do these:
add_filter( 'wp_nav_menu', function( $nav_menu, $args ) {
if( 'primary' != $args->theme_location || 'nav' != $args->container )
return $nav_menu;
$class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"';
$id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';
$search = '<'. $args->container . $id . $class . '>';
$replace = '<'. $args->container . $id . $class . ' role="navigation">';
return str_replace( $search, $replace, $nav_menu );
}, 10, 2 );