WordPress Version: 5.9
/**
* Adds the necessary JavaScript to communicate with the embedded iframes.
*
* This function is no longer used directly. For back-compat it exists exclusively as a way to indicate that the oEmbed
* host JS _should_ be added. In `default-filters.php` there remains this code:
*
* add_action( 'wp_head', 'wp_oembed_add_host_js' )
*
* Historically a site has been able to disable adding the oEmbed host script by doing:
*
* remove_action( 'wp_head', 'wp_oembed_add_host_js' )
*
* In order to ensure that such code still works as expected, this function remains. There is now a `has_action()` check
* in `wp_maybe_enqueue_oembed_host_js()` to see if `wp_oembed_add_host_js()` has not been unhooked from running at the
* `wp_head` action.
*
* @since 4.4.0
* @deprecated 5.9.0 Use {@see wp_maybe_enqueue_oembed_host_js()} instead.
*/
function wp_oembed_add_host_js()
{
}