WP - Add page slug to body class

wp-slug-body-class.php

/**
 * Add page slug to body class
 */
function add_slug_body_class($classes) {
  global $post;
  if (isset($post)) {
    $classes[] = $post->post_type . '-' . $post->post_name;
  }
  return $classes;
  }
add_filter( 'body_class', 'add_slug_body_class' );