WordPress at a glance
action is not described

customize_controls_head action-hook . WP 5.5.0

Fires in head section of Customizer controls.

Usage

add_action( 'customize_controls_head', 'action_function_name_1073' );
function action_function_name_1073(){
	// action...
}

Changelog

Since 5.5.0 Introduced.

Where the hook is called

In file: /wp-admin/customize.php
customize_controls_head
wp-admin/customize.php 177
do_action( 'customize_controls_head' );

Where in WP core the hook is used WordPress

wp-admin/customize.php 48
add_action( 'customize_controls_head', 'wp_admin_viewport_meta' );