render_block_core_navigation_submenu( array $attributes, string $content, WP_Block $block ): string

76function render_block_core_navigation_submenu( $attributes, $content, $block ) {77	// Check if this navigation item should render based on post status.78	if ( defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN ) {79		$should_render = gutenberg_block_core_shared_navigation_item_should_render( $attributes, $block );80	} else {81		$should_render = block_core_shared_navigation_item_should_render( $attributes, $block );82	}83	if ( ! $should_render ) {84		return '';85	}86 87	// Don't render the block's subtree if it has no label.88	if ( empty( $attributes['label'] ) ) {89		return '';90	}91 92	// Render inner blocks first to check if any menu items will actually display.93	$inner_blocks_html = '';94	foreach ( $block->inner_blocks as $inner_block ) {95		$inner_blocks_html .= $inner_block->render();96	}97	$has_submenu = ! empty( trim( $inner_blocks_html ) );98 99	$kind      = empty( $attributes['kind'] ) ? 'post_type' : str_replace( '-', '_', $attributes['kind'] );100	$is_active = ! empty( $attributes['id'] ) && get_queried_object_id() === (int) $attributes['id'] && ! empty( get_queried_object()->$kind );101 102	if ( is_post_type_archive() && ! empty( $attributes['url'] ) ) {103		$queried_archive_link = get_post_type_archive_link( get_queried_object()->name );104		if ( $attributes['url'] === $queried_archive_link ) {105			$is_active = true;106		}107	}108 109	$show_submenu_indicators = isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'];110	$computed_visibility     = block_core_navigation_submenu_get_submenu_visibility( $block->context );111	$open_on_click           = 'click' === $computed_visibility;112	$open_on_hover           = 'hover' === $computed_visibility;113	$open_on_hover_and_click = $open_on_hover && $show_submenu_indicators;114 115	$classes = array(116		'wp-block-navigation-item',117	);118 119	if ( $has_submenu ) {120		$classes[] = 'has-child';121	}122	if ( $open_on_click ) {123		$classes[] = 'open-on-click';124	}125	if ( $open_on_hover_and_click ) {126		$classes[] = 'open-on-hover-click';127	}128	if ( 'always' === $computed_visibility ) {129		$classes[] = 'open-always';130	}131	if ( $is_active ) {132		$classes[] = 'current-menu-item';133	}134 135	$wrapper_attributes = get_block_wrapper_attributes(136		array(137			'class' => implode( ' ', $classes ),138		)139	);140 141	$label = '';142 143	if ( isset( $attributes['label'] ) ) {144		$label .= wp_kses_post( $attributes['label'] );145	}146 147	$aria_label = sprintf(148		/* translators: Accessibility text. %s: Parent page title. */149		__( '%s submenu' ),150		wp_strip_all_tags( $label )151	);152 153	$html = '<li ' . $wrapper_attributes . '>';154 155	// If Submenus open on hover or are always open, we render an anchor tag with attributes.