I’m trying to add a class to anchor links of children element in wp_nav_menu both for pages and posts.
Is there a way to modify the Nav Menu Walker and do so?
Basically my custom walker looks like this:
class Main_Nav extends Walker_Nav_Menu {
function start_lvl(&$output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "\n$indent<ul class=\"dropdown-menu\">\n";
}
function start_el(&$output, $item, $depth, $args) {
if( $depth == 0) {
$output .= "<li class="menu">";
}
if( $depth == 1) {
$output .= "<li>";
}
$attributes="";
! empty( $item->attr_title ) and $attributes .= ' title="' . esc_attr( $item->attr_title ) .'"';
! empty( $item->target )and $attributes .= ' target="' . esc_attr( $item->target ) .'"';
! empty( $item->xfn )and $attributes .= ' rel="' . esc_attr( $item->xfn ) .'"';
! empty( $item->url )and $attributes .= ' href="' . esc_attr( $item->url ) .'"';
$title = apply_filters( 'the_title', $item->title, $item->ID );
if (/* THE MENU ELEMENT HAS CHILDREN */) {
$item_output =
"<a $attributes class="menu">"
. $title
. '</a> ';
}
else {
$item_output =
"<a $attributes>"
. $title
. '</a> ';
}
$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth);
}
}
As you see I don’t know what the proper condition instead of /* THE ELEMENT HAS CHILDREN */
.
Thank you.
UPDATE
Thanks to Tamil I updated the code as follows:
class Main_Nav extends Walker_Nav_Menu {
function start_lvl(&$output, $depth) {
$indent = str_repeat("\t", $depth);
$output .= "\n$indent<ul class=\"dropdown-menu\">\n";
}
function start_el(&$output, $item, $depth, $args) {
if( $depth == 0) {
$output .= "<li class="menu">";
}
if( $depth == 1) {
$output .= "<li>";
}
$attributes="";
! empty( $item->attr_title ) and $attributes .= ' title="' . esc_attr( $item->attr_title ) .'"';
! empty( $item->target )and $attributes .= ' target="' . esc_attr( $item->target ) .'"';
! empty( $item->xfn )and $attributes .= ' rel="' . esc_attr( $item->xfn ) .'"';
! empty( $item->url )and $attributes .= ' href="' . esc_attr( $item->url ) .'"';
$title = apply_filters( 'the_title', $item->title, $item->ID );
global $wpdb;
$query = $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->posts WHERE post_status="publish" AND post_type="nav_menu_item" AND post_parent=%d", $item->ID);
$child_count = $wpdb->get_var($query);
if($child_count > 0) { /* THE MENU ELEMENT HAS CHILDREN */
$item_output =
"<a $attributes class="menu">"
. $title
. '</a> ';
} else {
$item_output =
"<a $attributes>"
. $title
. '</a> ';
}
$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth);
}
}
No luck though 🙁
3 s
I was able to add a “parent” CSS class to the anchor tag of menu items who have children by following this answer: Add ‘has_children’ class to parent li when modifying Walker_Nav_Menu
Here’s an example:
class Main_Nav extends Walker_Nav_Menu {
/**
* @see Walker::start_el()
* @since 3.0.0
*
* @param string $output Passed by reference. Used to append additional content.
* @param object $item Menu item data object.
* @param int $depth Depth of menu item. Used for padding.
* @param int $current_page Menu item ID.
* @param object $args
*/
function start_el(&$output, $item, $depth, $args) {
global $wp_query;
$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
$class_names = $value="";
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$classes[] = 'menu-item-' . $item->ID;
$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 .'>';
$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 ) .'"' : '';
// Check our custom has_children property.
if ( $args->has_children ) {
$attributes .= ' class="menu parent"';
}
$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 );
}
function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {
$id_field = $this->db_fields['id'];
if ( is_object( $args[0] ) ) {
$args[0]->has_children = ! empty( $children_elements[$element->$id_field] );
}
return parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
}
}