block_core_navigation_add_directives_to_submenu( WP_HTML_Tag_Processor $tags, array $block_attributes ): string

1217function block_core_navigation_add_directives_to_submenu( $tags, $block_attributes ) {1218	while ( $tags->next_tag(1219		array(1220			'tag_name'   => 'LI',1221			'class_name' => 'has-child',1222		)1223	) ) {1224		// Add directives to the parent `<li>`.1225		$tags->set_attribute( 'data-wp-interactive', 'core/navigation' );1226		$tags->set_attribute( 'data-wp-context', '{ "submenuOpenedBy": { "click": false, "hover": false, "focus": false }, "type": "submenu", "modal": null, "previousFocus": null }' );1227		$tags->set_attribute( 'data-wp-watch', 'callbacks.initMenu' );1228		$tags->set_attribute( 'data-wp-on--focusout', 'actions.handleMenuFocusout' );1229		$tags->set_attribute( 'data-wp-on--keydown', 'actions.handleMenuKeydown' );1230 1231		// This is a fix for Safari. Without it, Safari doesn't change the active1232		// element when the user clicks on a button. It can be removed once we add1233		// an overlay to capture the clicks, instead of relying on the focusout1234		// event.1235		$tags->set_attribute( 'tabindex', '-1' );1236 1237		$computed_visibility = block_core_navigation_get_submenu_visibility( $block_attributes );1238		$open_on_hover       = 'hover' === $computed_visibility;1239 1240		if ( $open_on_hover ) {1241			$tags->set_attribute( 'data-wp-on--pointerenter', 'actions.openMenuOnHover' );1242			$tags->set_attribute( 'data-wp-on--pointerleave', 'actions.closeMenuOnHover' );1243		}1244 1245		// Add directives to the toggle submenu button.1246		if ( $tags->next_tag(1247			array(1248				'tag_name'   => 'BUTTON',1249				'class_name' => 'wp-block-navigation-submenu__toggle',1250			)1251		) ) {1252			$tags->set_attribute( 'data-wp-on--click', 'actions.toggleMenuOnClick' );1253			$tags->set_attribute( 'data-wp-bind--aria-expanded', 'state.isSubmenuOpen' );1254			// The `aria-expanded` attribute for SSR is already added in the submenu block.1255		}1256		// Add directives to the submenu.1257		if ( $tags->next_tag(1258			array(1259				'tag_name'   => 'UL',1260				'class_name' => 'wp-block-navigation__submenu-container',1261			)1262		) ) {1263			$tags->set_attribute( 'data-wp-on--focus', 'actions.openMenuOnFocus' );1264		}1265 1266		// Iterate through subitems if exist.1267		block_core_navigation_add_directives_to_submenu( $tags, $block_attributes );1268	}1269	return $tags->get_updated_html();1270}