Add page slug to body class in WordPress

wordpress-page-slug-body-class.md

Add page slug to body class

function wps_add_slug_to_body($classes)
{
    global $post;
    if (is_home()) {
        $key = array_search('blog', $classes);
        if ($key > -1) {
            unset($classes[$key]);
        }
    } elseif (is_page()) {
        $classes[] = sanitize_html_class($post->post_name);
    } elseif (is_singular()) {
        $classes[] = sanitize_html_class($post->post_name);
    }

    return $classes;
}

Usage

add_filter('body_class', ' wps_add_slug_to_body');