apply_filters( 'nav_menu_submenu_css_class', string[] $classes, stdClass $args, int $depth )

Filters the CSS class(es) applied to a menu list element.

Parameters

$classes

(string[]) Array of the CSS classes that are applied to the menu <ul> element.

$args

(stdClass) An object of wp_nav_menu() arguments.

$depth

(int) Depth of menu item. Used for padding.

Source

File: wp-includes/class-walker-nav-menu.php

View on Trac

Used By

Used By Description
wp-includes/class-walker-nav-menu.php: Walker_Nav_Menu::start_lvl()

Starts the list before the elements are added.

Changelog

Version Description
4.8.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/nav_menu_submenu_css_class