WordPress at a glance
action is not described

wp_nav_menu_item_custom_fields_customize_template action-hook . WP 5.4.0

Fires at the end of the form field template for nav menu items in the customizer.

Additional fields can be rendered here and managed in JavaScript.

Usage

add_action( 'wp_nav_menu_item_custom_fields_customize_template', 'action_function_name_5354' );
function action_function_name_5354(){
	// action...
}

Changelog

Since 5.4.0 Introduced.

Where the hook is called

WP_Customize_Nav_Menu_Item_Control::content_template()
wp_nav_menu_item_custom_fields_customize_template
wp-includes/customize/class-wp-customize-nav-menu-item-control.php 145
do_action( 'wp_nav_menu_item_custom_fields_customize_template' );

Where in WP core the hook is used

Usage not found!