Add a current class to post type parent in WordPress nav menus.

README.md

Add Post Type Current Class

WordPress Snippet

post-type-parent-current-class.php

<?php

/**
 * Add current class to post type parent in nav menus.
 */
function ccd_custom_active_item_classes( $classes = [], $menu_item = false ) {

	global $post;

	$classes[] = ( $menu_item->url == get_post_type_archive_link( $post->post_type ) ) ? 'current-menu-item active' : '';

	return $classes;

}
add_filter( 'nav_menu_css_class', 'custom_active_item_classes', 10, 2 );