Page slug to body class

functions.php

// Page Slug Body Class
// http://www.wpbeginner.com/wp-themes/how-to-add-page-slug-in-body-class-of-your-wordpress-themes/
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' );