Add page slug to body_class

// =========================================================================
// ADD PAGE SLUG TO BODY CLASS
// =========================================================================
function add_slug_to_body_class( $classes ) {
    global $post;
    if ( isset( $post ) ) {
        $classes[] = $post->post_type . '-' . $post->post_name;
    }
    return $classes;
}
add_filter( 'body_class', 'add_slug_to_body_class' );