WordPress Version: 6.2
/**
* Displays the class names for the body element.
*
* @since 2.8.0
*
* @param string|string[] $css_class Optional. Space-separated string or array of class names
* to add to the class list. Default empty.
*/
function body_class($css_class = '')
{
// Separates class names with a single space, collates class names for body element.
echo 'class="' . esc_attr(implode(' ', get_body_class($css_class))) . '"';
}