I'm trying to integrate WordPress Nav Walker with a two level dropdown, so:
URL
-URL2
--URL2
--URL23
I am using this code:
wp_nav_menu(array(
'theme_location' => 'main-menu',
'container' => false,
'menu_class' => '',
'fallback_cb' => '__return_false',
'items_wrap' => '<ul id="%1$s" class="navbar-nav me-auto mb-2 mb-md-0 %2$s">%3$s</ul>',
'depth' => 0,
'walker' => new bootstrap_5_wp_nav_menu_walker()
));
And this for the nav-walker:
class bootstrap_5_wp_nav_menu_walker extends Walker_Nav_menu
{
private $current_item;
private $dropdown_menu_alignment_values = [
'dropdown-menu-start',
'dropdown-menu-end',
'dropdown-menu-sm-start',
'dropdown-menu-sm-end',
'dropdown-menu-md-start',
'dropdown-menu-md-end',
'dropdown-menu-lg-start',
'dropdown-menu-lg-end',
'dropdown-menu-xl-start',
'dropdown-menu-xl-end',
'dropdown-menu-xxl-start',
'dropdown-menu-xxl-end'
];
function start_lvl(&$output, $depth = 0, $args = null)
{
$dropdown_menu_class[] = '';
foreach($this->current_item->classes as $class) {
if(in_array($class, $this->dropdown_menu_alignment_values)) {
$dropdown_menu_class[] = $class;
}
}
$indent = str_repeat("\t", $depth);
$submenu = ($depth > 0) ? ' sub-menu' : '';
$output .= "\n$indent<ul class=\"dropdown-menu$submenu " . esc_attr(implode(" ",$dropdown_menu_class)) . " depth_$depth\">\n";
}
function start_el(&$output, $item, $depth = 0, $args = null, $id = 0)
{
$this->current_item = $item;
$indent = ($depth) ? str_repeat("\t", $depth) : '';
$li_attributes = '';
$class_names = $value = '';
$classes = empty($item->classes) ? array() : (array) $item->classes;
$classes[] = ($args->walker->has_children) ? 'dropdown' : '';
$classes[] = 'nav-item';
$classes[] = 'nav-item-' . $item->ID;
if ($depth && $args->walker->has_children) {
$classes[] = 'dropdown-menu dropdown-menu-end';
}
$class_names = join(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args));
$class_names = ' class="' . esc_attr($class_names) . '"';
$id = apply_filters('nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args);
$id = strlen($id) ? ' id="' . esc_attr($id) . '"' : '';
$output .= $indent . '<li ' . $id . $value . $class_names . $li_attributes . '>';
$attributes = !empty($item->attr_title) ? ' title="' . esc_attr($item->attr_title) . '"' : '';
$attributes .= !empty($item->target) ? ' target="' . esc_attr($item->target) . '"' : '';
$attributes .= !empty($item->xfn) ? ' rel="' . esc_attr($item->xfn) . '"' : '';
$attributes .= !empty($item->url) ? ' href="' . esc_attr($item->url) . '"' : '';
$active_class = ($item->current || $item->current_item_ancestor || in_array("current_page_parent", $item->classes, true) || in_array("current-post-ancestor", $item->classes, true)) ? 'active' : '';
$nav_link_class = ( $depth > 0 ) ? 'dropdown-item ' : 'nav-link ';
$attributes .= ( $args->walker->has_children ) ? ' class="'. $nav_link_class . $active_class . ' dropdown-toggle" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false"' : ' class="'. $nav_link_class . $active_class . '"';
$item_output = $args->before;
$item_output .= '<a' . $attributes . '>';
$item_output .= $args->link_before . apply_filters('the_title', $item->title, $item->ID) . $args->link_after;
$item_output .= '</a>';
$item_output .= $args->after;
$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
}
}
// register a new menu
register_nav_menu('main-menu', 'Main menu');
Now I can get the menu to show up. On mobile even to open up. However, I can't get any of the sublevel menu items to show.
My problem is I don't know what to look for. Can't exactly figure out if it is related to css, the walker, or bootstrap in general.
For my menu items with sub-menu, I can see that the aria-dropdown is visible. If I click on them and inspect, I see the following three parameters flashing, like their classes should update, but they don't change:
"nav-link dropdown-toggle" aria-expanded="false"
and the ul under it containing the sub menu also flashes:
"dropdown-menu depth_0"
So nothing changes and I don't receive any errors. Any suggestions are appreciated.