wp_nav_menu_max_depth() │ WP 3.0.0

Adds a CSS class to display the max depth of the navigation menu.

No Hooks.

Returns

string. Modified CSS classes including the menu max depth class.

Usage

wp_nav_menu_max_depth( $classes );
$classes(string) (required)
Existing CSS classes for the body tag.

Notes

Global. Int. $_wp_nav_menu_max_depth Maximum depth of the navigation menu.

Changelog

Since 3.0.0 Introduced.

wp_nav_menu_max_depth() code WP 7.1

wp-admin/nav-menus.php 
function wp_nav_menu_max_depth( $classes ) {
	global $_wp_nav_menu_max_depth;
	return "$classes menu-max-depth-$_wp_nav_menu_max_depth";
}