wp-includes/class-wp-customize-nav-menus.php:639Adds the customizer settings and controls.
public function customize_register() { $changeset = $this->manager->unsanitized_post_values(); // Preview settings for nav menus early so that the sections and controls will be added properly. $nav_menus_setting_ids = array(); foreach ( array_keys( $changeset ) as $setting_id ) { if ( preg_match( '/^(nav_menu_locations|nav_menu|nav_menu_item)\[/', $setting_id ) ) { $nav_menus_setting_ids[] = $setting_id; } } $settings = $this->manager->add_dynamic_settings( $nav_menus_setting_ids ); if ( $this->manager->settings_previewed() ) { foreach ( $settings as $setting ) { $setting->preview(); } } // Require JS-rendered control types. $this->manager->register_panel_type( 'WP_Customize_Nav_Menus_Panel' ); $this->manager->register_control_type( 'WP_Customize_Nav_Menu_Control' ); $this->manager->register_control_type( 'WP_Customize_Nav_Menu_Name_Control' ); $this->manager->register_control_type( 'WP_Customize_Nav_Menu_Locations_Control' ); $this->manager->register_control_type( 'WP_Customize_Nav_Menu_Auto_Add_Control' ); $this->manager->register_control_type( 'WP_Customize_Nav_Menu_Item_Control' ); // Create a panel for Menus. $description = '<p>' . __( 'This panel is used for managing navigation menus for content you have already published on your site. You can create menus and add items for existing content such as pages, posts, categories, tags, formats, or custom links.' ) . '</p>'; if ( current_theme_supports( 'widgets' ) ) { $description .= '<p>' . sprintf( /* translators: %s: URL to the Widgets panel of the Customizer. */ __( 'Menus can be displayed in locations defined by your theme or in <a href="%s">widget areas</a> by adding a “Navigation Menu” widget.' ), "javascript:wp.customize.panel( 'widgets' ).focus();" ) . '</p>'; } else { $description .= '<p>' . __( 'Menus can be displayed in locations defined by your theme.' ) . '</p>'; } /* * Once multiple theme supports are allowed in WP_Customize_Panel, * this panel can be restricted to themes that support menus or widgets. */ $this->manager->add_panel( new WP_Customize_Nav_Menus_Panel( $this->manager, 'nav_menus', array( 'title' => __( 'Menus' ), 'description' => $description, 'priority' => 100, ) ) ); $menus = wp_get_nav_menus(); // Menu locations. $locations = get_registered_nav_menus(); $num_locations = count( $locations ); if ( 1 === $num_locations ) { $description = '<p>' . __( 'Your theme can display menus in one location. Select which menu you would like to use.' ) . '</p>'; } else { /* translators: %s: Number of menu locations. */ $description = '<p>' . sprintf( _n( 'Your theme can display menus in %s location. Select which menu you would like to use.', 'Your theme can display menus in %s locations. Select which menu appears in each location.', $num_locations ), number_format_i18n( $num_locations ) ) . '</p>'; } if ( current_theme_supports( 'widgets' ) ) { /* translators: URL to the Widgets panel of the Customizer. */ $description .= '<p>' . sprintf( __( 'If your theme has widget areas, you can also add menus there. Visit the <a href="%s">Widgets panel</a> and add a “Navigation Menu widget” to display a menu in a sidebar or footer.' ), "javascript:wp.customize.panel( 'widgets' ).focus();" ) . '</p>'; } $this->manager->add_section( 'menu_locations', array( 'title' => 1 === $num_locations ? _x( 'View Location', 'menu locations' ) : _x( 'View All Locations', 'menu locations' ), 'panel' => 'nav_menus', 'priority' => 30, 'description' => $description, ) );Introduced in 4.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-nav-menus.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.